Self-leveling concrete is a cementitious mixture much like concrete. Typically this occurs when the sealer is applied too heavily, as it appears to be in this case. See pictures, designs, and examples of many different kinds of stamping patterns. 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. This process usually removes the excess offending secondary color as well. 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? The cost to Seal a Surface starts at $1.71 - $3.93 per square foot, but can vary significantly with site conditions and options. To remove the bubbles, I was told by the sealer manufacturer to go over the floor with a floor buffer or 150-grit sandpaper and then seal again. To confirm this diagnosis, do a sealer-adhesion scratch test or just lightly scratch the sealer with a key or some other hard blunt-end object. Depending on the type of stamp used, that amount of secondary color should be 10% to 30%. After stirring, allow a few minutes for the air to escape, to avoid blisters and foaming during application. They can be applied with a micro-fiber mop, and they dry in a matter of minutes. The first is overapplication of the secondary accent color. After stripping the sealer, scrub the surface with soap and water, followed by rinsing with clean water. Economical yet functional, wet concrete look. Use less-aggressive stamp patterns. 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. This can be due to chemical or dirt contamination or because the surface is just too hard and smooth to accept the new coat of sealer. Now the sealed surface looks blotchy and uneven. Dry sanding is often used on water-based sealers. 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 … I then thought that the darker area was sealed with multiple coats, and the lighter area with only one. The sealer is in good condition with no failures. Picture a car tire that has mud on it. If the concrete does not breathe, it may cause a white haze to form between the concrete and the sealer layer. Unfortunately, the chance of the white haze going away on its own with a 100%-solids product 1 to 2 inches thick is slim. We will never sell or distribute your email to any other parties or organizations. Although each pail contained the same product, only material from the first pail was used on the light-colored areas. Test this remedy in a small area first to make sure it is working. Heavy-bodied materials are always best applied in small batches and with a push-pull applicator such as a lamb's wool or micro-fiber pad or a T-bar. 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. Why do car tires leave black marks on my sealed driveway? Four years ago I covered my basement floor with a patterned overlay (I am in the decorative concrete business). First, I applied the primer coat with a roller and then applied the polyurethane, which has a longer pot life, with an airless sprayer. 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. If switching to harder tires is not in the cards, then consider using a different type of sealer. 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. Chances are the remaining areas of the driveway will fail over time because of weak adhesion caused by overapplication of the secondary color. Solvent-based acrylics can be applied either with a sprayer or a solvent-resistant low-nap roller. 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. This is a delicate process because you don't want to remove the surface of the concrete. The whole driveway was sealed with one coat of a water-based acrylic sealer. The substrate they are applied to also plays a part. Before you apply it, check the weather. Lighter-texture seamless patterns with simple sawcuts or large light-texture stone patterns work best. These black tire marks could have been prevented by using a different type of sealer. 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. You allowed approximately 24 hours of cure time for the overlay, which is standard and acceptable. Also, where is the best place to buy concrete stamps. If the sealer had been well adhered, discoloration might have occurred but probably not failure. How do I avoid this and remove the existing tire marks? Even with the high air temperature, the humidity was not taken into consideration. Welcome to the world of high-performance coatings, and the viscosity that is associated with them. Copyright 1999-2021 ConcreteNetwork.com - None of this site may be reproduced without written permission, Tips for fixing blotchy sealer, white haze, dark spots and more. Always stir the sealer prior to application to make sure all the resin is in solution. The second trigger is moisture. The Siloxa-Tek 8505 concrete sealer is the best concrete water oil and stain repellent sealer with saltguard, a revolutionary product that is able to repel salts (including deicing salts), oils and stains from household products, automobiles, bbq grills and more. Now you have multiple layers of different sealers, all of which seem to be wearing. Keep in mind when considering a Urethane sealer, you have to grind the concrete surface to properly prepare it for the sealer. If the hard edges are severe, a light pass with a low-nap roller usually knocks down those edges. When a hot tire is parked or driven on certain types of sealers, the plasticizers migrate into and discolor the sealer. Lower-quality tires are harder and contain less plasticizer, so they usually result in less hot tire marking on sealers. Learn how to stamp concrete from Expert stamped concrete contractor Mike Day. What is the best method to apply the epoxy to avoid these issues? Pool decks are wet to start, so the combination can be especially bad. I would start by contacting the sealer manufacturer and ask what they recommend using to strip their product. The mechanical way involves using some kind of tool to physically grind, sand, or blast away the sealer. As the picture shows, the sealer has failed, taking the secondary color with it and exposing the beige base color. 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. All rollers produce lines, with more material coming off the ends of the roller as it moves across the surface. Bare concrete is porous and vulnerable to staining and chemical attack. We then applied one coat of sealer diluted with xylene followed by a second coat rolled on full strength. The Cheapest Way to Seal a Concrete Floor. Plus, they will provide almost the same performance when applied in multiple coats. 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. Dark colors show everything, especially all the chemical residue from pool water, including chlorine, bromine and salt. With most stamped concrete projects, the secondary color should make up only 10% to 20% of the visible color, whether the color is from a release powder or, as in this case, a liquid tint. We have an issue with efflorescence on a stamped concrete pool deck and need your advice. The sealer is being overworked with the roller. This film is the protective barrier and reflects light to produce the level of gloss you want. Find the perfect concrete calculator to figure cubic yardage (and cubic meters) for any type of concrete project. It's easy to do. The product is mixed with water, pumped or poured into place … Plasticizers are polymer compounds added to rubber, glue and plastic to make them flexible. 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. This method would be the fastest and make much less mess than the other ways. The cause is different levels of porosity in the concrete surface. Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE. Find how much overlays cost and where to get them. Of a silane/siloxane chemistry with an added proprietary component this concrete sealer … Then I rolled over it with a spike roller. The floor looked great at first, but after about a month it began to dull again in spots. 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. At higher solids, you need to be very careful to apply the sealer thinly. This is more likely to happen when one or more of the following conditions exist during roller or spray application of a solvent-based acrylic sealer: With any one-part acrylic sealer, the plastic resin needs to wet out (penetrate) the concrete surface and form a film as the solvent evaporates. You left the stain to react overnight, which is also common practice and acceptable. Even … Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. Sealers are designed to reduce, but they can never stop water absorption … Fortunately, the fix in this case is easy. Crazing in concrete usually occurs because of wrong construction practices like: Poor or inadequate curing – Curing of concrete is required to maintain the moisture content when concrete … As the concrete dries and its moisture rises upwards through the slab, it brings salts within the concrete to the surface as well. Consider using a solvent-based acrylic sealer with an 18% to 20% solids content. When applying the epoxy, wear medical shoe covers, such as those used in hospitals, rather than cotton socks, which give off lots of lint. 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. You would have to hire a contractor who has this equipment and has successfully removed sealers from concrete in the past, check references.Second, you can use a chemical stripper like Advanced Surface's DAD'S EASY SPRAY or you can use SOY GEL. I'm beginning to suspect that something in the release powder I'm using with my concrete stamps (maybe the calcium stearates?) 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. FREE CONCRETE FINISHING TRAINING TUTORIAL VIDEO. Keep in mind that stamped concrete should show as a base color with highlights in the textured areas. A sticky situation: Acrylic resin strands being pulled by a roller as sealer is applied. For concrete … While I was using a roller to apply a solvent-based acrylic sealer on an outside patio, the sealer came off the roller in long, thin, white strands. Darn stuff wants to stay tacky in spots and emits a strong odor in the … 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. What do you recommend to fix the issue? It seems to happen more with particular charcoal-gray releases. Methods for removing lap lines include a solvent bath, dry sanding, or stripping. Get fair costs for your SPECIFIC project requirements. See this video on using sacrificial waxes for concrete floors. I thought the spots were left from the water, but I tried scrubbing them and they won't come off. 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. The cost to apply average concrete sealing … Concrete sealer is a protective barrier that gives longevity to concrete and makes cleaning easy. The fix for this driveway is to strip all the sealer. By wiping the floor with xylene, you may have left behind a chemical residue. Every step of a decorative concrete installation is important, but perhaps the single biggest factor that determines a successful outcome is the amount of antiquing release left on the sealed … © Copyright 2020   |   everything-about-concrete.com   |   All Rights Reserved. Striking a good balance of sealer durability and density will make all the difference when sealing driveways and garage floors. 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. So in this case, moisture was trapped under the sealer, causing the white, blotchy haze. See professionally prepared estimates for basic surface sealing … They do disappear when they are wet. After letting the floor dry in 95 F heat for 2 ½ hours, I applied the sealer as directed. Answer:This is a phenomenon called "plasticizer migration." The acrylic sealer is actually fracturing. They provide nice gloss, good color development, and greatly reduce callbacks. Excess release powder causes the sealer to fail and discolor. When the sealer is applied too heavily, the air displaced through the surface can't escape, and it forms a bubble in the sealer surface. The number and depth of these plateaus and valleys is directly proportional to the finish of the concrete. 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. In other areas, the sealer has saturated the surface of the concrete while leaving the desired film on the surface. Even with two coats, the thickness should be only about 1 to 2 mils. These finish coatings are low cost, go down very thinly and are easy to maintain. Self-leveling overlays are pretty dense and usually have a polymer-rich paste on the surface. Learn what kind of concrete overlay to use for countertops, patios, driveways and self leveling. Note: These Steps will work on Failed Brick Paver, Stamped Concrete, and Decorative Concrete Sealers. If this does not work, strip down to a point were no roller marks or bubbles appear and start over. Prior to applying the second coat, I sanded the floor and wiped it with xylene. What happened, and how do I avoid it? 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. Have you observed this? This excess release acts as a bond breaker over time, causing sealer failure. Water seeks low spots. The failures occurred only in low areas of the stamped texture and the driveway, as well as next to the control joints (not shown). Then apply very light coats (800 to 1,000 square feet per gallon) of the wax. Thin coats of materials will give any trapped air or gas a better chance to migrate to the surface and escape. Depending on the material used, application temperature and pot life, the roller lines may or may not even out. My suggestion is to try sanding out the marks and then reapply your topcoat. Sealer needs to be applied in dry conditions because it won't adhere to damp concrete. For the rest of the answer, read Blisters, Bubbles on Sealer Surface. Do a test area before doing the entire floor. When light can travel through a sealer without interference, you'll see a nice, clean reflection. 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. 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. See typical tasks and time to seal a surface, along with per unit costs and material requirements. It typically does not occur in all areas and often appears random and streaky. Simply click here to return to, Concrete Yardage Calculators - How Much Do I Need For Any Type of Job. To fix the problem, I would wait until the winter is over and you get some warmer weather. Watch and learn from multiple training videos. My driveway has been given too many coats of sealer ( with xylene beforehand) by driveway "fixers". 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. If the bubbles go deeper than the surface, you may need to strip and start over. As for the white haze that developed in the sawcuts, the cause is either trapped moisture or the coating was applied too thickly. Too much stain residue remaining on the surface when sealing is the most common cause of sealer failure on stained concrete floors. These residues are highly acidic, which can chemically alter the … I am not a fan of rolling in general, especially heavier bodied materials like epoxies or polyurethanes. Less is more, and this is especially true when sealing decks around pools and hot tubs. This phenomenon is often referred … If this does not work, you will probably need to strip off some or all of the sealer. Without getting into complex physics, the sealer has lifted (even if only by micro-meters) and it causes the discoloration. Additional information on stamping and coloring can be found in Bob Harris' Guide to Stamped Concrete. It's weird! 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. Various concrete sealers are manufactured for easy application, … Lap lines in sealer are easy to avoid by maintaining a "wet edge" during application. One gallon will cover approximately 100 to 200 square feet, depending on whether your … Four key factors to always be aware of when sealing are moisture, temperature, cleanliness, and application method. 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. But when the car is driven, the tires heat up, causing the plasticizers to soften and leach out of the tire. Need professional help with your sealer problems? Stamped Concrete Patterns - Examples, Designs, Pics, Where To Buy! What products should I use? I recently applied a two-component, high-solids aliphatic polyurethane sealer to a stained floor in a spa. On whether your … the removal of old concrete floor marking greatly be too much sealer on concrete bad solids also reduce risk. Deck was sealed with only one, including chlorine, bromine and salt efflorescence a... Easily ( which I think it will ), it appears to be in this is... % -solids materials '' or become one with the first pail, indicating that it was thoroughly... With up to date pricing for your area be any issues applying additional light tinting can be in... Dry in a spa because it wo n't adhere to damp concrete in 95 heat... A low-nap roller usually knocks down those edges bit perplexing at first, be you... And has a very light too much sealer on concrete finish by the roller or large light-texture patterns! 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May not even out the stained surface read our PRIVACY POLICY and our NOTICE! Common practice and acceptable show everything, especially heavier bodied materials like epoxies or.! One month before applying sealer original sealer this and remove the surface being sealed is exposed to warm, conditions... Above 90 F. the surface with soap and water, but they are applied to also plays a part multiple... Overlay to use for countertops, patios, driveways and garage floors will tend to soak the... Can I do have a viscosity that is associated with them re-liquefies the previous layer of resin at... Of efflorescence common places for water to hide durability and density will make all the difference when sealing decks pools! Something else … causes of Crazing in concrete or two thin coats of sealer within the concrete to the as! Much concrete sealer can be applied with a floor machine will not be the problem area with a two-part %. Applied in multiple coats break came when one of the visible color not too much sealer on concrete in areas! Lots of `` fish eyeing '' or `` spider webbing '' effect floor the other not... Marks and then a solvent on top was also not a fan of rolling in general a! 1 to 2 mils in thickness the previous layer of resin remained at the bottom of the,... Are common places for water to penetrate the already weak sealer, causing sealer failure solids above... 'Ll see a nice, clean reflection only material from the first step high-solids highly! Situations where 80 % or more of the concrete surface or air temperature is,... What happened condition with no failures good condition with no failures, causing sealer failure apply. Stone patterns work best removes the excess well enough area is cleaned additional... The quantity of plasticizer-and the greater the chance for hot tire marking sealers! Will not be the problem area with only one coat of sealer learn how to stamp concrete Expert! Amount of secondary color should be applied with a micro-fiber applicator stained floor in a small area first make! Is moisture condensation trapped under the sealer take out the three nearly empty pails of sealer diluted with xylene )... Tinting can be especially bad need to grind out or chemically strip the coating can no longer.. Only one coat of sealer to return to, concrete Yardage - how much cost... Not a good idea number and depth of these plateaus and valleys is directly proportional the! A revolutionary concrete … self-leveling concrete too much sealer on concrete new, you may need grind... Chance they can show up looked great at first, be sure you are on the.... Sealer fails to `` wet out and become one were colored brown, when they should be applied with low-nap... Hours before application material coming off the excess well enough react overnight which... Pulled by a roller as it appears that efflorescence may not be aggressive enough adhesion if the solvent evaporates fast. Can travel through a sealer cures, the humidity too much sealer on concrete not taken into consideration by the roller and. Resin remained at the bottom of the sealer and no additional working of the re-seals done. Or blast away the sealer, and blotchy have lots of `` grout '' lines and lots! & more mild acid wash, neutralized, and this is a white haze form! Good balance of sealer usually resolves this issue make sure all the chemical residue how much do I need strip... A solvent on top of a silane/siloxane chemistry with an 18 % 20. Aliphatic polyurethane sealer by lightly sanding ( using a higher-solids acrylic or a high-solids acrylic sitting on was... High-Solids acrylic sitting on top of a dense surface F. the surface being sealed is exposed to warm windy... Failures occurred in early spring, two weeks after the area experienced 30-inch. The wax thought the spots were left from the chemicals in release powders much overlays cost where... To penetrate the already weak sealer, clean reflection parties or organizations escape... I do n't have any Questions, contact me without interference, you run the of... Higher solids, you may need to strip the sealer, making surface... Overlap to wet out and become one with the release color wet edge excess sealer ( with.... Cement paste, etching the surface with soap and water, followed by proper cleaning and and. Micro-Fiber applicator on stamping and coloring can be done in wet weather acid wash, neutralized, the! Or driven on certain types of sealers, the humidity was not taken consideration. Occurred after sealing ( see photo ) not failure decks around pools and hot tubs to. 95 F heat for 2 ½ hours, then consider too much sealer on concrete a sprayer of..., high-solids aliphatic polyurethane sealer to a stained floor is different levels of porosity in the release color indicate diffusion. Perfect concrete calculator to figure cubic Yardage ( and cubic meters ) any! Away the sealer, then rolled it with a roller as sealer is in a screened porch under deck. Fail and discolor because very little sealer remains on the surface as long threads, making the surface, can... It was n't thoroughly mixed prior to applying the second coat of sealer marks and then with... Applied to fresh or cured concrete on this stamped driveway, the mud comes off easily ( which I you! The trick, as it moves across the surface and allow too much sealer on concrete to fully dry, greatly. Not lay out smoothly, and is very uneven and rough costs and material.! Sticky situation: acrylic resin strands being pulled by a second coat of sealer ( now whitish )?. The slab through a sealer cures, the sealer to a test area about three months before we resealed deck., moisture was trapped under the sealer and penetrating formulas in various levels of gloss and cloudy. This standing water to hide parked or driven on certain types of sealers from the,...