I think I need to strip the sealer and reapply. Note: These Steps will work on Failed Brick Paver, Stamped Concrete, and Decorative Concrete Sealers. Less is more, and this is especially true when sealing decks around pools and hot tubs. I am not a fan of acrylic sealers with a solids content above 24%. From the picture, it appears that efflorescence may not be the problem. 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. Use a sealer with a solids content of less than 20%. So much resin was left on the bottom, it was equivalent to applying a 50% to 70% diluted sealer, with a consistency similar to water. Why do car tires leave black marks on my sealed driveway? How do I now reseal over the original sealer? What caused the sealer to fail on this stamped driveway after only 6 months? A sticky situation: Acrylic resin strands being pulled by a roller as sealer is applied. 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. I'm beginning to suspect that something in the release powder I'm using with my concrete stamps (maybe the calcium stearates?) The secondary accent color is a medium-brown acrylic/alcohol tint. Dry sanding is often used on water-based sealers. After letting the floor dry in 95 F heat for 2 ½ hours, I applied the sealer as directed. They provide nice gloss, good color development, and greatly reduce callbacks. Cracks and joints are common places for water to hide. But unlike concrete, it flows easier and sets up much faster. The sealer is in good condition with no failures. 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. I love the way the epoxy looks, but there are minor imperfections, such as trapped lint and small bubbles, that keep the surface from looking like a perfect sheet of glass. I applied a two-component high-solids epoxy sealer to a concrete floor, putting down the first coat in December and the second coat two months later. Solvent-based acrylics can be applied either with a sprayer or a solvent-resistant low-nap roller. How did you sand, and with what grit of sandpaper or screening? What can I do now to have the excess sealer ( now whitish) removed?A. Have you observed this? Striking a good balance of sealer durability and density will make all the difference when sealing driveways and garage floors. Coat the surface with enough sealant to evenly saturate the concrete, but not so much that it pools. If you are looking for a long lasting high gloss, wet look sealer … The second trigger is moisture. 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. Hi, I am Mike Day, owner of Day’s Concrete Floors, Inc. in Maine,  where I've been working with concrete for 40 years now, and this website is where I can share with you all the knowledge and wisdom I've gained from installing all kinds of decorative concrete, concrete floors, concrete overlays, stained concrete and also fixing cracked or spalled concrete. The fix requires spraying a thin layer of solvent (xylene or acetone) over the surface to loosen and "remelt" the strands back onto the surface. Lower solids allow moisture and air to move through the sealer easier. My suggestion is to try sanding out the marks and then reapply your topcoat. This is a common problem, more often found with water-based sealers. Siloxa-Tek 8500 – Best Industrial-Grade Siloxane Sealer. Sealer for driveways, parking structures, plazas, walkways & more. The whole driveway was sealed with one coat of a water-based acrylic sealer. What do you recommend to fix the issue? What is the best method to apply the epoxy to avoid these issues? 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. If the sealer had been well adhered, discoloration might have occurred but probably not failure. Self-leveling overlays are pretty dense and usually have a polymer-rich paste on the surface. See professionally prepared estimates for basic surface sealing … Before resealing, we cleaned the deck with a mild acid wash, neutralized, and then allowed the sealer to dry. After stirring, allow a few minutes for the air to escape, to avoid blisters and foaming during application. The mechanical way involves using some kind of tool to physically grind, sand, or blast away the sealer. Acrylic sealers are designed to go down very thin. Join in and write your own page! What are these, and how do I get rid of them? Even with the high air temperature, the humidity was not taken into consideration. If spider webbing does start to occur, stop and wait for conditions to improve. Do you have any other advice? As lovely as the word sounds, efflorescence … I applied a two-part polyurethane sealer to it. For concrete … The substrate they are applied to also plays a part. Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE. Moisture trapped under the sealer will also cause this "whitish looking effect". Otherwise, you will need to strip the sealer, clean the surface and allow it to fully dry, and then reseal. The cost to apply average concrete sealing … We applied the sealer to a test area about three months before we resealed, and there did not seem to be any issues. At higher solids, you need to be very careful to apply the sealer thinly. If you speed up, the mud flies all over and leaves more prominent marks on the outside edges of the tire. Acidic substances like vinegar and lemon juice will dissolve the cement paste, etching the surface. It is essential to remove a previous concrete sealer before sealing with a new concrete sealer in order to give the new concrete sealer excellent bond, adhesion and penetration depth. Depending on the type of stamp used, that amount of secondary color should be 10% to 30%. Too much water and/or too much sealer can result in water vapor that condenses beneath the sealer film, creating a pressure that can disbond sealer from concrete surface. How? For any exterior stamped concrete that will be sealed, and especially pool decks, I have a few hard, fast recommendations: Use light colors for the slab. The reason you notice the spotting so much is because the fracturing of the sealer is scattering the light that would normally travel through the sealer. The removal of old concrete sealer can be done in one of two ways: mechanical or chemical. As for the white haze that developed in the sawcuts, the cause is either trapped moisture or the coating was applied too thickly. If you were to look at a concrete floor under a microscope, you would see what looks like an endless range of plateaus and valleys. Efflorescence is a white salty residue caused when too much moisture is moving through the concrete. To avoid lap lines when using a roller, you must maintain a "wet edge" by applying a new pass of sealer while the previous pass of sealer is still wet. Thin coats of materials will give any trapped air or gas a better chance to migrate to the surface and escape. If it flakes, splinters, or comes off easily (which I think it will), it is probably diffusion. Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. 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. With all the acrylic tint laying on the surface, the sealer is not really adhering to the concrete, but to the thin layer of brown pigment. 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. Now you have multiple layers of different sealers, all of which seem to be wearing. However, if there is too high a buildup of sealer, evaporation cannot occur because moisture becomes trapped between the top of the concrete and the bottom of the sealer. The key to success with hybrid sealers … A. In general, a good-quality chemical stripper will do the trick. To give you some reference, a credit card is about 120 mils thick. 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. Get fair costs for your SPECIFIC project requirements. 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. These white spots are actually more gray, and they don't have the look of efflorescence. Brick Paver Sealers are different than regular concrete sealers in that they: Darken the appearance by … First, be sure you are using the proper applicator for the sealer type. They do disappear when they are wet. On this stamped driveway, the secondary tint makes up over 90% of the visible color. Lower-quality tires are harder and contain less plasticizer, so they usually result in less hot tire marking on sealers. Find the perfect concrete calculator to figure cubic yardage (and cubic meters) for any type of concrete project. So the best way to avoid it is to keep air and surface temperatures below 90 F and apply the sealer when winds are calm. I'm aware that release powder can cause failure of sealer adhesion if the installer does not clean off the excess well enough. This is a classic case of "fish eyeing" or "orange peel," two different terms that describe the same issue. Lap lines in sealer are easy to avoid by maintaining a "wet edge" during application. I thought the spots were left from the water, but I tried scrubbing them and they won't come off. Excess release powder causes the sealer to fail and discolor. The greater the cross linking, the denser the coating and the more resistant the sealer will be to hot tire marking. Water-based acrylics, however, should be applied with a micro-fiber applicator. There is always a trigger mechanism for sealers becoming cloudy or white, and we need to timeline your project to find what it is. I recently applied a two-component, high-solids aliphatic polyurethane sealer to a stained floor in a spa. Using a higher-solids acrylic or a high-solids, highly cross-linked polyurethane or epoxy sealer will reduce hot tire marking greatly. 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. If the bubbles go deeper than the surface, you may need to strip and start over. As the concrete dries and its moisture rises upwards through the slab, it brings salts within the concrete to the surface as well. The best thing to do is go back to the original coat of polyurethane sealer by lightly sanding (using a 200 grit). Unfortunately, the chance of the white haze going away on its own with a 100%-solids product 1 to 2 inches thick is slim. The concrete surface or air temperature is high, above 90 F. The surface being sealed is exposed to warm, windy conditions. Bubbles can be eliminated by applying the epoxy using a spiked roller, which will allow any trapped air or gas to escape. Do you know why this is happening? Find concrete contractors near me. Acrylic sealers are designed to go down very thin. What is probably happening is diffusion. The Cheapest Way to Seal a Concrete Floor. Consider using a solvent-based acrylic sealer with an 18% to 20% solids content. This process usually removes the excess offending secondary color as well. Applying a water-based wax and then a solvent on top was also not a good idea. If this does not work, strip down to a point were no roller marks or bubbles appear and start over. Let the driveway dry for a minimum of 24 hours, then reseal with one or two thin coats of sealer. The acrylic sealer is actually fracturing. Keep in mind when considering a Urethane sealer, you have to grind the concrete surface to properly prepare it for the sealer. When a hot tire is parked or driven on certain types of sealers, the plasticizers migrate into and discolor the sealer. 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. FREE CONCRETE FINISHING TRAINING TUTORIAL VIDEO. Liquids will tend to soak into the surface, carrying stains into the concrete itself. The product is mixed with water, pumped or poured into place … This film is the protective barrier and reflects light to produce the level of gloss you want. Often I see situations where 80% or more of the surface is covered with the release color. What is causing the white spots, and what percent of acrylic sealer or type of sealer do you recommend for a stamped pool deck? Or spread out the acrylic more thinly to achieve a 1- to 2-mil thickness and then apply multiple coats of a wax-modified finish coat or sacrificial topcoat designed for concrete floors. Then apply very light coats (800 to 1,000 square feet per gallon) of the wax. You may want to consider using a lower-solids-content coating, such as a two-part epoxy or polyurethane in the 50% to 60% solids range. Learn what kind of concrete overlay to use for countertops, patios, driveways and self leveling. In other areas, the sealer has saturated the surface of the concrete while leaving the desired film on the surface. Simply enter your zip code and the square footage, next click update and you will see a breakdown on what it should cost to have Acrylic Concrete Sealer … But will buffing be aggressive enough to take out the marks? Hot water is better if you can arrange it. 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. Use a 200+ grit screen to lightly sand the surface and knock down the lap lines, and then re-apply the same water-based sealer to even out the sanded surface. We have an issue with efflorescence on a stamped concrete pool deck and need your advice. If switching to harder tires is not in the cards, then consider using a different type of sealer. First, I applied the primer coat with a roller and then applied the polyurethane, which has a longer pot life, with an airless sprayer. We then applied one coat of sealer diluted with xylene followed by a second coat rolled on full strength. Instead, this looks like sealer diffusion. It takes significantly longer for water to evaporate out of a crack or joint-or in your case, a sawcut-than the larger flat surface area of a slab. I used a squeegee to apply the sealer, then rolled it with an epoxy roller with a 1/8-inch nap thickness. These sealers form very dense films that limit or prevent plasticizer migration. It's easy to do. Acrylic sealers applied too heavily may fracture. After the sealer dried, the floor appeared blotchy, with some areas glossy and others not. 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