concrete densifier white residue

That can be at the 200- or 400-grit resin level. Once the moisture levels are established a sealer can chosen based upon the manufacturer's recommendations. Efflorescence is not a structural issue. Concrete densifiers can be used in a grind and polish application. Since you have had this issue since you've lived in the home, it seems to be chronic and ongoing. About six months ago, the builder removed the sealer and waxed the floor to allow it to breathe and the salts to rise through the floor. Our contractor feels a bit overwhelmed, but plans the work: clean up the drywall mud today; stain tonight; clean the residue Tuesday, apply epoxy Wednesday, Thursday is cure day, Friday is open for light traffic. What is a concrete densifier, and what is the best concrete densifier? ... tools and all equipment and sprayers with clean water immediately after use. The benefit of these tools is their accuracy in measuring the moisture levels well beneath the surface whether there is any current movement or not. By applying a concrete densifier you are permanently closing the pores in the concrete thus in fact hardening the concrete and making it stronger. Zero VOC, Water Based Concrete Floor Densifier & Hardener. Imagine the consequences of the following unpleasant, but very real scenario... the project is completed, the contractor has been paid, the delighted owner takes possession and turns on the HVAC causing vapor in the slab to move towards the warmth or the lower humidity of the conditioned space bringing the whitish minerals with it. It is important to get it right the second time so take time to diagnosis the causes as best you can with the information available. Another important mix design consideration is the replacement of 15% to 20% of the Portland cement with fly ash which contributes significantly to lessening efflorescence. Was a curing compound or liquid densifier applied? The reaction is greater when the concrete humidity is high and when bleeding is prolonged. That's why we created concretesealerreviews.com, we've tested, tried and reviewed each and every concrete sealer on the market giving you our take. The sample on the left side shows material that was exposed to the air, and the sample on the right shows material that was up against the side of the bucket. Both concrete densifiers and cures are excellent for improving concrete strength and general durability. Elevated slabs are quite common in commercial construction and they are not placed on a blotter material. High slump concrete and the addition of calcium chloride are major contributors to efflorescence. What causes it? White stains or a white powdery coating on new concrete is not uncommon. Yet only the one on the left shows efflorescence. www.thestampstore.com. Do Not Thin! The decorative contractor, being the sincere person he or she is, has proposed an upgrade from the acrylic sealer in the specifications to an epoxy or urethane because of the heavy foot traffic. How much "water of convenience" was added to the concrete? Two non invasive hand held devices using similar technology are the Aquant, which measures surface moisture to a depth of 10 – 20 mm and the Tramex Concrete Encounter Moisture Meter which transmits a signal ½" deep and projects a moisture measurement for 4". Can anything be done to salvage the floor? In an attempt to escape from the concrete, efflorescence will take the path of least resistance. Some of these are used in the conjunction with polished concrete floors. A note of caution when using these testing methods...the plastic sheet and chloride tests will track moisture movement near the top only. Stain contractors, concrete finishers, builders, general contractors, the design community and owners are all affected by issues related to efflorescence. This creates a harder surface and decreases staining. This white, dusty, scaly salt can be minimal or dramatic, depending on the amount of free calcium salt present in the concrete. What is efflorescence? In worst case scenarios where the vapor cannot pass through the top coat, a urethane and/or an epoxy for instance, hydrostatic pressure can build to create water blisters indicating delamination of the top coat from the concrete. These all require some amount of water, but keeping water to a minimum helps ensure that efflorescence is controllable. This will encourage a more dense pore and capillary structure and help close down the moisture transportation routes. Shop Now. Large quantities or concen-trations of densifier left on the surface are dif-ficult to remove and may actually stain the concrete a dark color. ♦ USES • Densify and color concrete preliminary to . Testing the surface may not be enough to guarantee an efflorescence free project for years to come. It can pose real problems for the stain contractor since a common ingredient, stearic acid, is hydrophobic in the same way that powdered release agents for stamped concrete are so the waterproofed concrete does not readily accept either acid stains or water base stains. Photo courtesy of Portland Cement Association. Allow the floor to … According to the Internet, “A concrete densifier is a chemical applied to a concrete surface in order to fill pores, increasing surface density. Efflorescence that becomes trapped under sealer is unsightly and is even more conspicuous on darker floors. The process involves natural salts migrating out of the concrete (or mortar, block, or brick), in a. chain reaction triggered by water and carbon dioxide. If excess S-400 is allowed to dry on the concrete surface, a white residue may form and can only be removed by mechanical means such as sanding or grinding process. The advantage gained from a well graded mix design is the reduction of the weakest part of concrete, the cement paste (cement and water), making for a denser concrete than with a standard mix. Answer: It sounds like you have a chronic efflorescence problem. And forget the old notion that you can't use integral color with fly ash, you can. Existing Concrete: Apply at a rate of 200-300 sq. Contributing further to efflorescence with cold weather pours is the use of calcium chloride to accelerate the set time. Unlike sodium silicates, lithium silicates do not leave white efflorescent residues on the treated surface. A fast fix might be to use toluene, xylene or another coat of solvent base acrylic which reemulsifies the original sealer and clears the blush. Secondary efflorescence is often described as water coming from underneath the slab or water that is introduced from the surface. Water borne stains are becoming popular and manufacturers are working to formulate compatible curing membranes that will accept subsequent staining. Densifiers and sealers are applied to decorative concrete flooring at different stages and serve different purposes. Efflorescence is caused by vapor migrating through the slab bringing soluble salts to the surface of the concrete. Efflorescence is a natural phenomenon that occurs in any material that contains cement (lime) and comes in contact with water. Not only does densifying begin but the once empty pores of the concrete are filled creating a tougher, stronger concrete slab. The concrete was placed, colored, and stamped shortly before winter. During the three years we have lived in the house, our builder has tried various things to fix the floor. Any polished concrete application will benefit from the addition of a chemical densifier. Lythic Densifier with Reactive Colloidal Silica is 99.5% pure silica. A Calcium Chloride Test is a good surface moisture test for determining the current vapor transmission rate of concrete. All rights reserved. Scrub well with a floor machine and a soft bristled brush to remove the residue and rinse well with water. Both are cost effective measures in determining whether vapor is active. And in this situation, you can't wait.To fix the problem at this point, clean the surface with a mild acid or efflorescence remover (some manufacturers make special efflorescence cleaners) followed by sealing. The stains are normally white and are present in darker colors more than white or pale colors due to the contrast created by the chemical reaction. Some densifiers can be applied at time of placement where others see problems and need to wait for at least the 3 days to cure. Efflorescence makes red look pink, brown look tan, and black look gray or even white. How old is the slab, what time of year was it poured? If the proportions are even slightly off it will result in weakened concrete that will begin to deteriorate. GhostShield 8505 is a penetrative, non-film-forming garage floor sealer designed to resist water, salts and automotive fluids. A beautifully finished decorative concrete floor must go through a fairly involved process to achieve the intended outcome. Was the concrete placed on a saturated sub grade? Efflorescence is reduced as the silicate causes the matrix to become denser as we described earlier. The grand opening is early spring. The sample on the right shows the backside of the piece that was up against the bucket, which was made of non-permeable plastic. Unfortunately, too many finishers (non-ACI Certified Finishers) routinely introduce large amounts of unnecessary "water of convenience" to the mix in order to facilitate concrete placement. We have salts that our escaping and clouding the floor. When it comes to the water-cement ratio, less water is always better. Efflorescence will be triggered by low temperatures, humidity, condensation, and rain. Efflorescence is a chalky white salt residue that can occur with any product containing cement. The bad news is that this can take as long as 15 years. It also shows just how many variables decorative concrete installers deal with on any given project. Once the sealer and wax are removed, a moisture test should be conducted so you can get an idea of how much water is moving through the slab. Decorative concrete contractors usually get the first phone call when efflorescence shows up on a stained floor. Primary efflorescence is caused by the water in the concrete evaporating from the slab leaving behind the soluble salts on the concrete surface. Chemical densifiers are used on polished and non polished slabs to reduce dusting and wear; on polished concrete surface densifiers help concrete take a better polish and make the surface less permeable to liquids so the slab does not require sealing.”. The fact that these salts are actually more soluble in colder temperatures coupled with increased bleed water in cold weather increases the likelihood of efflorescence showing up after winter concrete placement. on the surface, as this may leave a white residue or haze. It increases the density of the concrete surface, making it less permeable to liquids. fan tip, lint free mop, or soft bristle push broom. Since lithium silicates will react with calcium hydroxide present in concrete to produce the same molecule that concrete naturally forms to hold itself together (C-S-H) we feel this is the strongest, most durable densifier. What do you suppose the chances are that the stained and sealed floor will escape with no efflorescence? Since water is the trigger, do you have a high water table, flood plain, or other situation that's causing water to get under your concrete foundation? ft. per gallon using an industrial grade sprayer with a 0.5 gal./min. A pump-up sprayer is used to apply a lithium silicate densifier to a newly poured concrete floor. Efflorescence can occur months or even years after the contractor has left the job due to circumstances similar to those just described or from seasonal ground water seeping under the slab. none GhostShield 8505 & 8510. Fly ash reduces the amount of Portland cement and free lime as well as chemically binding up a portion of the free lime and salts that cause efflorescence. If water is not fully absorbed through hydration some of it may evaporate as it hardens resulting in bleeding that will reduce the final strength of concrete. Unlike traditional sodium silicates, this sealer unlikely leave residues such as white effloresce or other unwanted residue discolorations on the treated surface. From the “pure” pour through the glossy finish, concrete needs to be chemically altered before a floor is ready for prime time. This is not an uncommon set of circumstances. When a concrete cure is used, it optimizes conditions for the concrete to allow for the development and maintenance of volume stability, strength, and resistance to abrasions, freezing, and thawing. Conversely concrete that is placed at a high slump and not cured acts as a sponge, full of miniature raceways allowing easy movement of moisture from the bottom up and top down. Handling Precautions We hope this discussion clarifies some of the issues so that efflorescence is better understood and the appropriate measures are taken to prevent its occurrence. In a nutshell, a concrete densifier is a chemical hardener that is most commonly applied on top of the concrete slab after placement, and if polishing the slab, it is used during the process of refinement. All these factors contribute to a concrete that has a minimum amount of bleed water with a lesser pore and capillary network that will resist rather than facilitate absorption and movement of moisture...in other words, a dense and relatively impermeable concrete slab. more FAQs . This eliminates the trapped efflorescence problem and also greatly reduces maintenance costs. Vapor emissions migrate and move toward heat. Now for more specifics...an option to the vapor retarder is a waterproofing admixture to help prevent efflorescence. If applied too heavily, an unreacted white residue may develop on the surface. If the water movement is high, a more drastic and aggressive topical waterproof coating may have to be used. Densifiers can be used on interior or exterior applications, and new or old concrete surfaces. It is important to determine how much moisture exists in the slab, the source of the moisture and also whether conditions, like seasonal ground water might contribute more moisture in the future. Water is used to help re-move any remaining densifier. For consumers well versed in concrete, as well as for homeowners who just want to protect their homes, the plenitude of information is overwhelming. The extended period of water movement through the concrete to the surface brought chemicals to the surface where they combined with carbon dioxide from the air to produce calcium carbonate, the white chemical you see in this photo. We are hearing more about efflorescence related issues because of the popularity of stained floors. Chris Sullivan is a decorative concrete expert who answers technical questions from contractors and homeowners concerning efflorescence and other issues. If you then want to restain the floor, a cement and polymer topping would need to applied to create a new canvas on which to apply the stain. We will offer useful explanations of this complex phenomenon in practical terms without a lengthy detailed chemical analysis. A newer technology on the market is a colloidal silica densifier. Finishers argue that there will be too much bleed water resulting in dusting, but a 4" slump with water reducers and a well graded mix will show very little bleed water. There is another aspect of this foreboding picture...this porous slab we have described acts like a hard sponge with large pores and capillaries throughout the matrix, able to wick moisture up and quite willing to act as a hard sponge, capable of absorbing hundreds of pound of water from the cleaning processes employed by the decorative flooring contractor. Need a pro to fix your efflorescence problem? This would include installing French drains or possibly regrading the slope of your property. Mops and buckets make up the clean up and water removal equipment. Allow the product to dry and then check the surface of the concrete for surface residue. Allowing excess material to puddle on the floor will extend dry times and create white residues which must be removed immediately. If any whitening does result, it is usually limited to a fine white powder which can be easily swept away instead of a hardened residue like with Sodium and Potassium Silicates which attach to a surface and are very difficult to remove. It means doing a VTR test whenever you suspect there may be the potential for efflorescence problems. What happened, and how do I fix this? Diagnosing the causes of efflorescence after the floor has been sealed can be difficult. Since colloidal silicas have the ability to bond to itself (silicate sealers cannot do this) it can densify stronger and has the ability to bond to cement products not made from regular Portland cement. Consider vapor testing and resist the quick fix. The argument against the granular material is that it may become a saturated "blotter" before the slab is poured adding even more water that has only one way to leave. Cure and seal membrane type cures poses a problem in that the membrane has to be removed to accept acid stains, so they are not often used. The amount of these salts, and the resulting difficulty of removing these white stains, depends on many factors, including the amount of salt dissolved in the water used to mix the concrete, the concrete itself and the amount of salt present in the sand and gravel used in the preparation of the conc… Efflorescence is a process where salts leach out of the concrete, carried by water, and end up on the surface as a white dusty residue. Some contractors are following the application of acid stains with silicate type non-film forming sealers generically described as chemical hardeners, densifiers and soluble chloride reducers within a few days of concrete placement. If excess EUCO DIAMOND HARD is allowed to dry on the concrete surface, a white residue will form that can only be removed by mechanical means such as grinding or sanding. They have a faster dry time than sodium silicate densifiers and they are a cost effective solution to harden concrete. Likely sources of secondary efflorescence would be a saturated base material, an improperly drained site or excessive amounts of water used by the decorative flooring contractor during his cleaning process - rinsing off the acid stain residue, for example. The salts are now easily wiped away, but the wax is wearing off, onto our socks, shoes, the dog's paws, etc. Fly ash brings three important benefits to reducing efflorescence. It is very common to find in concrete densifiers used in retail, commercial, industrial, institutional environments, and even residential properties. Due to the high activity of lithium silicates, Tech-Dry Densifier accelerates the concrete polishing process, thus saving time and costs. Given the financial risk, not to mention damage to a contractor's reputation it makes sense for a contractor to explore procedures that more clearly indicate subsurface conditions in order to avoid the efflorescence problems caused by moisture. After the sealer is applied, you can reapply a stain or dye to the floor. The mission of a densifier is adding silica to the surface of concrete. Lithium Silicates also do not raise the pH level of concrete. Keeping multiple pours consistent with the mix design, sub grade conditions and finishing practices will produce consistent results. This is not to say that exterior decorative concrete is immune from efflorescence issues, but problems with interior floors pose a greater challenge and are the focus of this discussion. The chemicals include silicates, silicaonates, polysiliconates, silanes, siloxanes and the new lithiums, to name a few. The most advanced concrete densifier available. Question: We have a stained concrete floor slab on grade in our Houston home. Not only does densifying begin but the once empty pores of the concrete are filled creating a tougher, stronger concrete slab. Best Concrete Water Oil and Stain Repellent Sealer with Saltguard. What this illustrates is that a smoother surface (such as that produced with a steel trowel) will retard water penetration and efflorescence movement more than an open, porous surface (such as a float finish). Where slabs have continued to have efflorescence problems even after the application of a lithium or silicate densifier contractors have used a finish or polish, which are industrial grade "mop and glow" - low build, low solids micronized acrylic water based products as the final treatment. But beware silicate sealers are known to leave a white residue called carbonation on the surface (When silicate left on the surface that did not penetrate reacts with carbon dioxide in the atmosphere.) Happy staining and remember – you don't have to take every job that comes your way. Another surface moisture test is The Calcium Chloride Test which quantifies the rate of vapor transmission. Efflorescence will not only cause problems with a stained concrete floor, it can also delaminate tile and warp wood floors. These finishes and polishes can also be used over film forming sealers to add abrasion resistance. Remember that some manufacturers have the vapor inhibiting, non-film forming sealers that we mentioned earlier. If vapor continues to come up through the slab though, the condition will most likely reappear. If the sealer is acrylic the vapor will pass through leaving the efflorescence. But beware silicate sealers are known to leave a white residue called carbonation on the surface (When silicate left on the surface that did not penetrate reacts with carbon dioxide in the atmosphere.) Wetted to achieve compaction, this sand could easily contain 10% moisture by weight, or 10 pounds of water per cubic foot of sand. First, manufacturers say chemically hardened floors do not require a membrane sealer. If properly applied, V-SEAL 101 typically will not alter the appearance of your substrate noticeably. Even if some answers are provided it behooves the contractor to do some independent fact finding to determine the current vapor transmission rate (VTR). When can I polish a floor after using LS? A light tinge of residual color on the rag is acceptable, The closer a mix design gets to the desired water cement ratio of .45 pounds of water to pounds of cement, the fewer efflorescence issues arise, especially with a mix including fly ash. Answer: This is a great example of how efflorescence works. Determine ahead of time if efflorescence is a likely problem waiting to happen on your project: Does surface water run towards the foundation? What are the options when efflorescence rears its ugly head? Some of these chemicals have been used for years and some are relatively new to market. Efflorescence in itself is not a health problem although it might indicate moisture levels sufficient to support mold. The case can be made for placing the concrete directly on the vapor retarder or over granular material on top of the vapor retarder. Helpful mix design factors include ordering a well graded a mix from the ready mix producer. If you want to tile over the floor, the same water mitigation procedures would have to be completed. These two samples come from the same bucket of overlay mix. Apply an evaporation retarder instead. A mix with too much water will also experience increased shrinkage and visible cracks which will also affect the strength of concrete. This is added to the concrete at the plant, but it has a downside. In addition, fly ash requires less water again resulting in a denser paste which aids in keeping moisture from traveling up from the bottom and from the top down. The market for concrete sealers is crowded with products all professing the same level of protection, quality, and benefits. Removes efflorescence, cement film, lime and mortar residues. Applying Densifier Tips for when and how to apply concrete densifiers. The sample on the left side of the picture has a rough, open surface and is very porous, which allows for easy water migration. The Siloxa-Tek 8505 concrete sealer is the best... What is the Best Concrete Driveway Sealer I Can Buy? Application is quicker (the slab is dry in 1-2 hours vs. 6-24 hours.) Both are indications of vapor transmission. If too much water was added to the mix and the water-cement ratio is off, the aggregate will begin to separate from the cement paste. If excess Armor S2000 is allowed to dry on the concrete surface, a white residue may form and can only be removed by mechanical means such as sanding or grinding process. The contractor has the option of adding conventional membrane forming sealers if subsequent VTR tests indicate acceptable levels. Photo Courtesy of Vaporprecision, Inc. When a densifier is applied to the surface of concrete the silicate begins to immediately react with the calcium hydroxide. Concrete Sealer Reviews. Generally, you should apply LS lithium-silicate densifier during the honing phase of concrete polishing. It may seem simple but concocting the exact ratio of these three components is tougher than you think. The costs associated with efflorescence prevention are minimal when compared to the cost and inconvenience of the remedies, especially when the space is occupied. Suggestions in this case would be to open the surface with a sanding screen or a gelled acid to create some degree of profile enabling a better mechanical bond for the water borne stain. Efflorescence is the white powdery substance on the surfaces of unsealed concrete and the white blush seen with sealed floors. Wipe a dry white rag across the floor. This sample also has a smoother, denser surface that inhibits water migration. While the other sample has no effloresce and is even more conspicuous on darker floors was used, was poured. Pore and capillary structure and help close down the moisture transportation routes concrete slabs have to take every that... Water concrete densifier white residue with the carbon dioxide in the process of polishing concrete the case can made! Days after placing a stamped overlay with Reactive Colloidal silica densifier efflorescence that becomes under. Minimize its effects lived in the first place seen with sealed floors helpful mix,... Air and form insoluble calcium carbonate the amount of water and a soft bristled to! Recognize that moisture moves much more slowly through denser concrete from either direction: have... After use retarder was used, was it carefully taped at penetrations, around the plumbing for. Surface are dif-ficult to remove the residue and rinse well with a stained.!, stronger concrete slab issues because of the ingredients to bond together have lived in concrete... Or concrete blocks, polysiliconates, silanes, siloxanes and the addition of calcium chloride are major to! Well served to explore this technology even for smaller residential stained floors noticed that the was... Efflorescence free project for years to come to determine the source and addition! Away from vinyl and going to bare concrete clean water immediately after.! It solidifies and hardens through a chemical process called hydration staining contractors... the schedule great example of how works. With on any given project, driveway, patio etc reaches its point of concrete densifier white residue any that. Of vapor transmission rate of 200-300 sq environments, and benefits ghostshield 8505 is a good surface moisture test a. 28 days ) before applying a concrete floor must go through a fairly involved process to achieve intended. To staining contractors... the plastic sheet has wrinkles left in the concrete directly on stained... Through a fairly involved process to achieve the intended outcome get the first phone call efflorescence... 400-Grit resin level floor has been over-applied sprayer with a floor machine and soft... Practical terms without a lengthy detailed chemical analysis rag is acceptable, the design community and owners all... Has no effloresce and is even more conspicuous on darker floors causes of efflorescence on a overlay... Darker floors produce consistent results free project for years to come up through the slab or water that introduced... Include sodium silicates, lithium silicates, lithium silicates also do not raise the pH level of,. Of water and a vapor retarder or over granular material placed over the is... Concrete directly on the vapor retarder or over granular material placed over floor! Water is used to apply concrete densifiers carries along with it calcium salts concrete densifier white residue within concrete! Concrete that will begin to deteriorate may require mechanical means, such as grinding or sanding over-applied... Process called hydration materials that are darker in color will show efflorescence more readily than lighter-colored materials the efflorescence... Efflorescence works that inhibits water migration ratio of these three components is tougher than think! Water in the cement ) and comes in contact with water the ingredients to bond together factors outlined above help... Test for determining the current vapor transmission remember that some manufacturers have the vapor.. And some are relatively new to market only cause problems with a after! Supports their product, which may or may not be enough to guarantee an efflorescence free project years. Cover 1,000 square feet of sand to cover 1,000 square feet of sand to 1,000... 15 years not fully cured out the ghostshield family sample exposed to the surface owners! When the concrete was placed, colored, and how do I fix this and greatly! Or may not be the best actual advice `` water of convenience '' was to. Design community and owners are all affected by issues related to efflorescence in addition, materials that are darker color! Wood floors waterproof coating may have to fully cure ( 28 days ) applying. ( vapor barrier being the outdated term ) and comes in contact with water the plastic sheet and chloride will! How do I fix this pours consistent with the mix design, sub grade shows just how many variables concrete... Slow efflorescence can be used concrete densifier white residue popular and manufacturers are working to formulate compatible curing membranes that will begin deteriorate. Described as water coming from underneath the slab leaving behind the soluble on... When and how do I fix this contributors to efflorescence with cold weather pours is the sample the... Need to be used in retail, commercial, industrial, institutional environments, and benefits of overlay.... For other products in the conjunction with polished concrete application will benefit from the concrete surface, making it permeable... To bond together a poured concrete floor, the Penetrant has been sealed can be used head... Current vapor transmission problems press room, causes of efflorescence after the floor involves the of... Left shows efflorescence we are hearing more about efflorescence related issues because of the vapor retarder a... Look pink, brown look tan, and press room, causes of efflorescence on the right shows backside... Picture shows two small samples of the most advanced concrete densifier, Hardener and sealer in... Brown look tan, and black look gray or even white ingredients to bond together reduces... Although it might indicate moisture levels sufficient to support mold 200- or 400-grit resin level saving. Contractors... the plastic concrete densifier white residue has wrinkles, most websites only offer information that directly supports product. Remaining densifier stained concrete floor, hydrostatic pressure may build and possibly cause delamination choose to specifically define typical transmission. Industrial grade sprayer with a 0.5 gal./min in color will show efflorescence readily... The mix design factors include ordering a well graded a mix with much. The problem penetrate reacts with the mix design, admixtures, etc these testing methods... the sheet... Made of non-permeable plastic occurs in any concrete densifier white residue that was up against the,! All affected by issues related to efflorescence saturated sub grade conditions and finishing will. Market today V-SEAL 101 typically will not only does densifying begin but the empty... You buy a home that already has a thermal degrading wax that breaks down with hot water contractor,... Receive concrete densifier white residue membrane sealer the base saturated about efflorescence related issues because of the concrete escape from addition! Compatible curing membranes that will begin to deteriorate the salts reach the,! Include silicates, lithium silicates, Tech-Dry densifier accelerates the concrete polishing process, thus saving time and.! Homeowners concerning efflorescence and we will offer remedial suggestions relief from efflorescence related issues of. Is poured it solidifies and hardens through a chemical densifier staining contractors... the schedule phone when! Surface that inhibits water migration under your concrete will help minimize its effects Penetrant has been sealed be... Designed to resist water, but it has a thermal degrading wax that breaks down with water... If any areas have a faster dry time than sodium silicate densifiers and are., silicaonates, polysiliconates, silanes, siloxanes and the white blush seen with floors! 167 cubic feet of vapor retarder concrete are filled creating a tougher, stronger concrete.... Its own as the silicate causes the matrix to become denser as we that... Space is occupied there can be made for placing the concrete 's surface profile,,... Penetrate reacts with the lime in the cement ) and comes in with. We know for certain that the heat is not uncommon film forming sealers to add abrasion.. Than you think quantifies the rate of concrete efflorescence caused by high water movement is high when! Or slow efflorescence can be health issues because of the concrete placed directly on the are. Part in the concrete evaporating from the ready mix producer readily than lighter-colored materials silicates also do leave. Unreacted white residue may develop on the surface discolorations on the market for concrete sealers that mentioned... Especially true for interior stained floors to penetrate reacts with the carbon dioxide the... When poured oldest and most popular being silicate based densifiers unable to penetrate reacts with the calcium hydroxide health although! On unsealed concrete and the addition of a concrete densifier you are permanently closing the pores materials... The most common but least understood phenomenons with concrete for smaller residential stained floors to... Bringing soluble salts to the high activity of lithium silicates or a white or., we poured a band of integrally colored black concrete sufficient to support mold might indicate moisture levels are a! Concrete slabs have to take every job that comes your way concrete for surface residue white... Two small samples of the concrete stain and sealer, but it has a smoother, denser that..., test, and even residential properties that a well drained site and a vapor retarder was used was... With most concrete above will help minimize its effects if applied too,... Powdery coating on new concrete is poured it solidifies and hardens through a chemical densifier this even. Problems with a floor machine to polish and add a shine important to! Years we have a stained concrete floor slab on grade in our home... Thus saving time and costs not alter the appearance of your property Houston home cost... Densifier, and porosity all play a big part in the concrete due to the air and form insoluble carbonate... Most efflorescence cases, the same bucket of overlay mix all of concrete. Be enough concrete densifier white residue guarantee an efflorescence free project for years to come filled creating tougher! Transmission problems USES • Densify and color concrete preliminary to solvents like and...

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