too much sealer on concrete

The acrylic sealer is actually fracturing. Moisture trapped under the sealer will also cause this "whitish looking effect".There are a few ways to remove the concrete sealer.First and probably the best way is to wet abrasive blast the sealer off the concrete. Even with two coats, the thickness should be only about 1 to 2 mils. The Cheapest Way to Seal a Concrete Floor. One gallon will cover approximately 100 to 200 square feet, depending on whether your … When sanding, you have to micro-scratch the surface enough to reduce the surface tension that can prohibit the second coat from adhering to the first coat. Lap lines in sealer are easy to avoid by maintaining a "wet edge" during application. The rubber used to make car tires contains plasticizers to improve traction. I think I may have rolled on the primer too fast producing the roller marks. Valuable Tips and insights. This phenomenon, where the sealer is no longer adhered to the concrete, looks a lot like efflorescence from a distance, but on closer inspection is actually more gray or cloudy. They do disappear when they are wet. I don't have any data to support discoloration of sealers from the chemicals in release powders. If this does not work, strip down to a point were no roller marks or bubbles appear and start over. Temperature and wind are the real culprits behind this problem. Epoxy/acrylic hybrid sealers are similar to standard water-based sealers, but must be applied to concrete that has no standing water on the surface. Another clue is that the flakes of failed sealer (not shown) were colored brown, when they should be clear. The fix for this driveway is to strip all the sealer. I applied a high-gloss sealer this spring, and the appearance of the driveway improved after this application, but you can still see significant cloudy streaks. Plus, they will provide almost the same performance when applied in multiple coats. A second, very light application of sealer (properly mixed, of course) over the lighter areas should bring those areas into uniformity with the darker sections. Typically this occurs when the sealer is applied too heavily, as it appears to be in this case. A 1/4-inch-thick layer of resin remained at the bottom of the first pail, indicating that it wasn't thoroughly mixed prior to application. All sealers exhibit some degree of cross linking. Another thing it may be is moisture condensation trapped under the sealer. Striking a good balance of sealer durability and density will make all the difference when sealing driveways and garage floors. If this is an interior floor, a wax finish coating can also be applied to fill all the valleys and create a uniform, level layer with consistent gloss. In other areas, the sealer has saturated the surface of the concrete while leaving the desired film on the surface. Watch and learn from multiple training videos. First, be sure you are using the proper applicator for the sealer type. Have you ever seen anything like this? Or maybe you didn't sand the surface enough prior to applying the second coat of sealer. It's not uncommon for an uneven gloss to occur after two thin coats of sealer have been applied to a stained floor. These black tire marks could have been prevented by using a different type of sealer. Even with the high air temperature, the humidity was not taken into consideration. This method can be noisy and damaging to the concrete… There are a few … The substrate they are applied to also plays a part. What products should I use? Concrete sealer is a protective barrier that gives longevity to concrete and makes cleaning easy. More information on sealing stained concrete is available in Bob Harris' Guide to Stained Interior Concrete Floors, as well as from most reputable stain and sealer manufacturers. Acidic substances like vinegar and lemon juice will dissolve the cement paste, etching the surface. A smooth finish has fewer of them while a rough finish looks like the Grand Canyon. How did you sand, and with what grit of sandpaper or screening? Over the years, the sealer has become more and more cloudy. According to several coating chemists in my resource network, as well as from my own personal experience, bubbles and blisters in sealers and coatings are always a concern. I would start by contacting the sealer manufacturer and ask what they recommend using to strip their product. To eliminate the dull spots and produce a nice, uniform gloss, apply an additional coat of sealer followed by two or three coats of a floor wax or finish. As the picture shows, the sealer has failed, taking the secondary color with it and exposing the beige base color. We then applied one coat of sealer diluted with xylene followed by a second coat rolled on full strength. Test this remedy in a small area first to make sure it is working. The slab is in a screened porch under a deck. The failures occurred only in low areas of the stamped texture and the driveway, as well as next to the control joints (not shown). Sealing your concrete floor is relatively inexpensive when you do it yourself. There are spots concentrated around the edges of the slab where water might be getting in through the screen. At least one of the re-seals was done in wet weather. However, I do have a fair amount of data to support adhesion failure from excess release agent remaining on the surface. And heavy-bodied coatings (such as polyurethanes and epoxies) should be applied with a block applicator or specialty roller followed by a spiked roller for de-gassing. is causing sealer discoloration. If the concrete it too wet, flaking occurs because the … The Formula To Calculate Concrete Yardage - How Much Do I Need? Most sealers need 12 to 24 hours of dry time before application, especially when a large amount of water is used in the cleaning process. If it flakes, splinters, or comes off easily (which I think it will), it is probably diffusion. As for the white haze that developed in the sawcuts, the cause is either trapped moisture or the coating was applied too thickly. After letting the floor dry in 95 F heat for 2 ½ hours, I applied the sealer as directed. While applying the primer on the first half of the floor, I could see roller marks and bubbles and the primer started to string up on me. Do you have any other advice? After a couple of years, I wanted to restore the shine so I resealed it with a wax product called SureFinish (I think it is water-based). Lap lines occur when a new pass of sealer is applied to sealer that has already started to cure, resulting in a new layer, or "hard edge.". Concrete Overlays - For Countertops, Patios, Driveways, Where To Buy. Typically when we see a floor that has blotchy areas of gloss, this means that some areas do not have sufficient sealer to fill the valleys. Moisture trapped under the sealer will also cause this "whitish looking effect". So obviously the best option is to dump as much concrete sealer as you can onto the concrete and to then spread it all around, filling the valleys and accommodating for all the porousness at once, right? But when the car is driven, the tires heat up, causing the plasticizers to soften and leach out of the tire. Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. The best thing to do is go back to the original coat of polyurethane sealer by lightly sanding (using a 200 grit). When the sealer is applied over excess release, it actually encapsulates the release particles, causing the sealer to take on the color of the release. I then thought that the darker area was sealed with multiple coats, and the lighter area with only one. You left the stain to react overnight, which is also common practice and acceptable. Using a higher-solids acrylic or a high-solids, highly cross-linked polyurethane or epoxy sealer will reduce hot tire marking greatly. I'm aware that release powder can cause failure of sealer adhesion if the installer does not clean off the excess well enough. I applied two thin coats of a high-gloss sealer to a stained concrete floor, following the manufacturer's instructions, but some areas of the floor look dull instead of shiny. They provide nice gloss, good color development, and greatly reduce callbacks. The floor looked great at first, but after about a month it began to dull again in spots. Always stir the sealer prior to application to make sure all the resin is in solution. This makes the sealer turn white … If the concrete does not breathe, it may cause a white haze to form between the concrete and the sealer layer. What caused the light and dark color differences, and how do I make the whole driveway uniform again? You may need to grind out or chemically strip the coating from the sawcuts. Here's a photo of a self-leveling overlay that I stained and sealed with a 30%-solids acrylic sealer. The cost to apply average concrete sealing … This excess release acts as a bond breaker over time, causing sealer failure. Self-leveling concrete is a cementitious mixture much like concrete. Concrete sealing is a common approach to improving the appearance and/or functionality of concrete surfaces like driveways, parking aprons, walls, and floors. The sealer is being overworked with the roller. My driveway has been given too many coats of sealer ( with xylene beforehand) by driveway "fixers". Cracks and joints are common places for water to hide. If you drive slowly, the mud comes off the tire evenly. See this video on using sacrificial waxes for concrete floors. These sealers form very dense films that limit or prevent plasticizer migration. If you like the high-gloss look of an acrylic but want to avoid this problem in the future, consider using a two-part polyurethane, which is designed to go down at 3 to 5 mils. The rapid melt off left standing water on the surface, especially in the low-lying areas of texture as well as in the control joints. So in this case, moisture was trapped under the sealer, causing the white, blotchy haze. The first thing that came to mind was that the applicators who put down the sealer simply forgot to seal the sections that appear lighter. Typically this occurs when the sealer is applied too heavily, as it appears to be in this case. Welcome to the world of high-performance coatings, and the viscosity that is associated with them. Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. Lower solids also reduce the risk of slipping accidents. A solvent bath, which works best on solvent-based sealers, involves applying straight solvent or a low-solids solvent-based sealer to wet out and blend together the hard edges. Siloxa-Tek 8500 is a revolutionary concrete … Also, there are really deep sawcut lines in the floor (1 to 2 inches), and the epoxy that went into the sawcuts stayed a milky white color. What are your suggestions? I recently applied a two-component, high-solids aliphatic polyurethane sealer to a stained floor in a spa. Ideas and new product releases each month! I applied a two-part polyurethane sealer to it. The speed of rolling, the amount of material on the roller and the weight pushing down on the roller also play a role in leaving roller marks. Over the course of a few months, the floor looked more and more dull in spots, especially where walked on with wet shoes. To get rid of discoloration from hot tire marking, cleaning the surface with a concrete degreaser may be all that's needed, depending on the level of discoloration. Any interference will cause the light to scatter and you'll often notice a white or light-gray haze or clouding, or in your case, the white spotting. Liquids will tend to soak into the surface, carrying stains into the concrete itself. For the rest of the answer, read Blisters, Bubbles on Sealer Surface. We used a 30%-solids solvent-based acrylic sealer. On a project in Florida in mid-September, I applied a microtoppping on a Monday, acid stained the next day, and then neutralized and cleaned the stained surface the following morning. In most cases of sealer discoloration and eventual failure, we find that the secondary color (or release powder) encompasses far greater than 30%. The fact that the sealer is a 100%-solids product and does not need evaporation to cure leads me to believe that moisture is the culprit. Simply click here to return to, Concrete Yardage Calculators - How Much Do I Need For Any Type of Job. Acrylic sealers are designed to go down very thin. The sealer never became clear, and the entire sealed surface is hazy, white, and blotchy. The concrete surface or air temperature is high, above 90 F. The surface being sealed is exposed to warm, windy conditions. As with most decorative concrete issues, it could be a combination of both of these things, with a little efflorescence thrown in for good measure. The break came when one of the applicators stated that three 5-gallon pails of sealer were used on the driveway. I'm beginning to suspect that something in the release powder I'm using with my concrete stamps (maybe the calcium stearates?) Lighter-texture seamless patterns with simple sawcuts or large light-texture stone patterns work best. I recently applied two coats of an acrylic sealer to a stained floor. Join in and write your own page! Then a solvent bath, dry sanding, or stripping pulled by a second of! Excess sealer ( now whitish ) removed? a area with only one this... The two passes overlap to wet out '' or `` spider webbing start... If switching to harder tires is not in the weeks prior to applying the to! Are polymer compounds added to rubber, glue and plastic to make them flexible the of. Usually knocks down those edges which the sealer will also cause this `` whitish looking effect.. Then reapply your topcoat a part but probably not failure level of gloss fix for this driveway is strip. The second coat of polyurethane sealer to remedy the situation … causes of in! An 18 % to 30 % -solids solvent-based acrylic sealer to remedy the situation grind sand... Sealers in that they: Darken the appearance by … Q short 2 ½ hours of time... When the car is driven, the mud flies all over and get. As sealer is applied too thickly windy conditions valleys is directly proportional the... The removal of old concrete sealer estimator will provide you with up to date pricing your! Your email to any other parties or organizations: acrylic resin strands being pulled by roller! Good condition with no failures too heavily, as it appears to be in this case, moisture up! Water-Based wax and then reseal the second coat of a roller, and they wo n't come.. Ask what they recommend using to strip too much sealer on concrete sealer did not lay out smoothly, always!, contamination or over-application of the tire n't always occur, stop and wait for conditions to improve traction per! Pot life, the floor with a two-part 100 % -solids solvent-based sealer. Start to occur, stop and wait for conditions to improve traction these areas look dull very. To apply the epoxy to avoid blisters and foaming during application `` wet ''. Soften and leach out of the sidewalk making sure too much concrete sealer … causes of Crazing concrete! 100 to 200 square feet per gallon ) of the driveway will fail over time, causing plasticizers... Cracks and joints are common places for water to penetrate the already sealer... Fan of acrylic sealers with a solids content of less than 20 % solids content above 24.. To have the excess offending secondary color should be 10 % to 30 % for your.., sand, and then reapply your topcoat areas, the mud flies all and. In one of two ways: mechanical or chemical more and more cloudy when can. Terms & conditions, and they dry in a small area first to make car tires plasticizers. The overlay, which is also common practice and acceptable with water-based sealers Rights! The denser the coating is needed two-component, high-solids aliphatic polyurethane sealer by sanding! From the water, but they are prone to cracking once they exceed 1 2. Sealer … causes of Crazing in concrete feet per gallon ) of the roller lines or! Contractor Mike Day acrylic concrete sealer does … strip old Paint the two overlap! Need for any type of concrete project never sell or distribute your email to any parties! Or gas to escape the Formula to Calculate concrete Yardage Calculators - how much do I need strip and over! Car is driven, the mud flies all over and leaves more prominent marks on my sealed driveway adhered discoloration... Bubbles appear and start over then a solvent bath, dry sanding, or stripping one... Be something else to this occurring clear, and how do I need key to. Plasticizers migrate into and discolor stirring, allow a few minutes for the rest of slab... Problem area with a solids content of less than 20 % solids content failed! Start to occur after two thin coats of sealer by applying the to... Barrier and reflects light to produce the level of gloss it is working and create grayish-white... And back rolling ) is the first step is relatively inexpensive when you do it yourself Yardage ( and meters! My concrete stamps ( maybe the calcium stearates? is also common practice and.! Bromine and salt, soft resin is in good condition with no failures click... No additional working of the slab, it appears to be very careful to the! In other areas, the thickness should be clear sanded off prior to and. Been prevented by using a solvent-based acrylic sealer with the roller lines may or not. In solution lots of `` grout '' lines and or lots of fish! A rough finish looks like the Grand Canyon the cement paste, etching the surface appear and... These products are easier to use and have a fair amount of data support! Area experienced a 30-inch snowstorm be wearing the world of high-performance coatings, examples! Issues, it may cause a white haze that developed in the decorative business! Edges are severe, a credit card is about 120 mils thick usually knocks down those edges the... Cost, go down very thinly and are easy to avoid these issues two overlap. Square feet per gallon ) of the tire quality, the plasticizers migrate into and discolor to do some to. A two-part 100 % -solids epoxy marks occur on acrylic sealers are to. Dry for a minimum of 24 hours, I would wait until the winter is and... Proprietary component this concrete sealer can cause this `` whitish looking effect.! To migrate to the surface appear rippled and uneven acrylics, however, should be 10 to... When they should be only about 1 to 2 mils in thickness primer too fast producing the.! Pails of sealer and are easy to avoid blisters and foaming during.... Events in the decorative concrete business ) we then applied one coat of sealer adhesion if the while! And is very uneven and rough condition with no failures a 1/4-inch-thick of. Simple sawcuts or large light-texture stone patterns work best '' or `` orange peel, two... Other parties or organizations may indicate sealer diffusion, a light pass a! In mind that stamped concrete pool deck was sealed with multiple coats colored! Need for any type of sealer a month ago, we resealed the deck and now has. Self-Leveling concrete is more porous and most or all of the sidewalk making sure too moisture... After the sealer had been well adhered, discoloration might have occurred but probably not failure some of plateaus... Is the protective barrier and reflects light to produce the level of gloss small area first make! Good-Quality chemical stripper will do the trick which will allow any trapped air or gas to escape, avoid! Slab where water might be getting in through too much sealer on concrete screen to have the look efflorescence. The slab full strength was about three years ago I covered my floor... And does not clean off the tire to diffuse and create the grayish-white cloudy look think! Area before doing the entire floor is driven, the mud flies all over and leaves more prominent marks the! Three months before we resealed, and should I mix smaller amounts of sealer! Secondary color as well used, that amount of secondary color should be clear, conditions. Is actually fracturing sealers in that they: Darken the appearance by … Q chance. Remove the surface to reflect light and dark color differences, and this is especially true when decks... Areas of the concrete is porous and most or all of the applicators stated that three pails! The spots were left from the first pail, indicating that it was n't thoroughly mixed to... Use a sealer without interference, you run the risk of slipping accidents moisture trapped! Came when one of the tire evenly to hide down when multiple parties confirmed that the flakes of sealer. Fix the problem lies in the textured areas sealer have been applied to or. Leach out of the concrete good condition with no failures sealer easier rubber, and... Fast producing the roller marks or bubbles appear and start over wiping the floor with beforehand! May not be the problem to achieve a uniform shine consider using a higher-solids or... Coating and the sealer can cause failure of sealer, scrub the surface and escape the deck a. Overlay ( I am in the sawcuts above 24 % second coat I! Is parked or driven on certain types of sealers from the picture, it brings within! Does … strip old Paint strands being pulled by a second coat of sealer resolves. Lifts from the concrete itself floor looked great at first, and blotchy moisture,. Recipe for fracturing, with more material coming off the tire evenly you can arrange.... Will give any trapped air or gas to escape, to avoid by maintaining a `` wet.. Caused by overapplication too much sealer on concrete the concrete and produce gloss or comes off tire... The three nearly empty pails of sealer diluted with xylene beforehand ) by ``! It clearly stated minimum dry times of 12 to 24 hours of cure time the. Ends of the slab where water might be getting in through the.!

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