4 December 2020

too much sealer on concrete


Concrete Overlays - For Countertops, Patios, Driveways, Where To Buy. I have a colored, exposed-aggregate driveway. Do you have any other advice? 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 cost to apply average concrete sealing … Also, should I apply the primer using a sprayer instead of a roller, and should I mix smaller amounts of the sealer? Keep in mind that stamped concrete should show as a base color with highlights in the textured areas. If it flakes, splinters, or comes off easily (which I think it will), it is probably diffusion. 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. Concrete sealers are great solutions to protecting concrete, but in some cases, the use of a sealer alone isn’t enough. I used a squeegee to apply the sealer, then rolled it with an epoxy roller with a 1/8-inch nap thickness. To fix the problem, I would wait until the winter is over and you get some warmer weather. Continue this along the length of the sidewalk making sure too much concrete sealer does … In fact, in tests I have witnessed the calcium stearate and calcium carbonate - the two major components of common release powders - are inert and have no chemical interaction with the acrylic resins in common sealers. These white spots are actually more gray, and they don't have the look of efflorescence. Get fair costs for your SPECIFIC project requirements. The rubber used to make car tires contains plasticizers to improve traction. They do disappear when they are wet. 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. They can be applied to fresh or cured concrete. Seems as if I got too much of an application of Thompsons deck sealer on my deck after I cleaned and water washed it. When a sealer cures, the resins cross link, forming a sticky tangle, like a bowl of undercooked spaghetti. What are these, and how do I get rid of them? Before resealing, we cleaned the deck with a mild acid wash, neutralized, and then allowed the sealer to dry. Self-leveling concrete is a cementitious mixture much like concrete. 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? After time, the sealer can also start to delaminate (come away from the concrete or previous layer of sealer), which will only make the cloudiness worse. As the concrete dries and its moisture rises upwards through the slab, it brings salts within the concrete to the surface as well. 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. Have you observed this? Typically this occurs when the sealer is applied too heavily, as it appears to be in this case. 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. The problem lies in the short 2 ½ hours of dry time after you neutralized and cleaned the stained surface. If the sealer had been well adhered, discoloration might have occurred but probably not failure. Dry sanding is often used on water-based sealers. When this occurs, moisture builds up and condenses under the sealer, making it turn white and cloudy. 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. If you are looking for a long lasting high gloss, wet look sealer … There’s a lot to cover, so if you have any questions, contact me! 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. It may take you several applications to completely remove all the concrete sealer.Third, you could hire someone to lightly sandblast the sealer off the surface. When the applicator applies a solvent-based acrylic sealer, some of the solvent soaks into the porous concrete. See examples using these formulas to calculate concrete yardage for square slabs, round slabs, cylinders, sono tubes, stairs, steps, curbs, footings, and walls. The sealer is in good condition with no failures. Pour drainage and slope caused this standing water to penetrate the already weak sealer, and failure occurred. Although each pail contained the same product, only material from the first pail was used on the light-colored areas. How do I prevent these lines, and is there a way to remove them? The sealer is being overworked with the roller. These failures occurred in early spring, two weeks after the area experienced a 30-inch snowstorm. But unlike concrete, it flows easier and sets up much faster. Fortunately, the fix in this case is easy. What happened, and how do I avoid it? When a concrete sealer flakes, it is usually because of one of the following reasons: The concrete was not dry enough when the sealer was applied. What is probably happening is diffusion. First, be sure you are using the proper applicator for the sealer type. Temperature and wind are the real culprits behind this problem. 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. To give you some reference, a credit card is about 120 mils thick. In general, a good-quality chemical stripper will do the trick. Use less-aggressive stamp patterns. The second trigger is moisture. When light can travel through a sealer without interference, you'll see a nice, clean reflection. Is it perhaps because the original sealer was a polyurethane that the others sealers are not bonding to, and with washing and water exposure, they are coming off? So in this case, moisture was trapped under the sealer, causing the white, blotchy haze. 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). 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. It's weird! Siloxa-Tek 8500 – Best Industrial-Grade Siloxane Sealer. Instead, this looks like sealer diffusion. The concrete surface or air temperature is high, above 90 F. The surface being sealed is exposed to warm, windy conditions. FREE CONCRETE FINISHING TRAINING TUTORIAL VIDEO. What causes this, and should I apply more sealer to remedy the situation? All sealers exhibit some degree of cross linking. This explains the lighter color on the first section compared to the darker sections, which had full-strength sealer applied to them from the second and third pails. Sealing your concrete floor is relatively inexpensive when you do it yourself. Sealer for driveways, parking structures, plazas, walkways & more. is causing sealer discoloration. This excess release acts as a bond breaker over time, causing sealer failure. Concrete sealer is a protective barrier that gives longevity to concrete and makes cleaning easy. Then I rolled over it with a spike roller. Excess release powder causes the sealer to fail and discolor. Once the area is cleaned, additional LIGHT tinting can be performed, followed by proper cleaning and drying and surface resealing. 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 … Lower solids allow moisture and air to move through the sealer easier. We applied the sealer to a test area about three months before we resealed, and there did not seem to be any issues. 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. Economical yet functional, wet concrete look. This driveway was integrally colored and has a very light brush finish. The whole driveway was sealed with one coat of a water-based acrylic sealer. This permits the edges where the two passes overlap to wet out and become one. I stripped the floor with a mild muriatic acid cleaner and applied an acrylic solvent-based sealer, thinking that I needed the solvent to restore the color. 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. Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE. I think you are on the right track in terms of the other sealers not bonding to the original polyurethane sealer. 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. Brick Paver Sealers are different than regular concrete sealers in that they: Darken the appearance by … As lovely as the word sounds, efflorescence … If spider webbing does start to occur, stop and wait for conditions to improve. The sealer never became clear, and the entire sealed surface is hazy, white, and blotchy. 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. Simply click here to return to Concrete Sealer Questions. Why do car tires leave black marks on my sealed driveway? You may need to grind out or chemically strip the coating from the sawcuts. It may take multiple attempts to get it all off, depending on how many layers of sealer are on the slab. Unfortunately, the chance of the white haze going away on its own with a 100%-solids product 1 to 2 inches thick is slim. One gallon will cover approximately 100 to 200 square feet, depending on whether your … 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. Even with the high air temperature, the humidity was not taken into consideration. Contact us and view our privacy policy, terms & conditions, and press room. Acrylic sealers are designed to go down very thin. All rollers produce lines, with more material coming off the ends of the roller as it moves across the surface. Without getting into complex physics, the sealer has lifted (even if only by micro-meters) and it causes the discoloration. Ideas and new product releases each month! The floor looked great at first, but after about a month it began to dull again in spots. Find how much overlays cost and where to get them. I recently applied a two-component, high-solids aliphatic polyurethane sealer to a stained floor in a spa. Shortly after applying a solvent-based acrylic sealer, tiny blisters and bubbles appeared on the surface of the sealer. If the solvent evaporates too fast, the sticky, soft resin is pulled into strands by the roller. 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. These residues are highly acidic, which can chemically alter the … Coat the surface with enough sealant to evenly saturate the concrete, but not so much that it pools. You allowed approximately 24 hours of cure time for the overlay, which is standard and acceptable. 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. Also, read the label, because in this case it clearly stated minimum dry times of 12 to 24 hours before application. The fix for this driveway is to strip all the sealer. 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 … Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. How To Stamp A Concrete Patio - Learn From Mike Day's Training Course. 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. A sticky situation: Acrylic resin strands being pulled by a roller as sealer is applied. It's not uncommon for an uneven gloss to occur after two thin coats of sealer have been applied to a stained floor. Typically the solvent re-liquefies the previous layer of sealer and no additional working of the coating is needed. The grayish-white spots on this pool deck may indicate sealer diffusion, a condition in which the sealer lifts from the concrete. If you drive slowly, the mud comes off the tire evenly. When a hot tire is parked or driven on certain types of sealers, the plasticizers migrate into and discolor the sealer. Valuable Tips and insights. Also avoid overworking the sealer with the roller, and always maintain a wet edge. 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. Lower solids also reduce the risk of slipping accidents. Strip Old Paint. What went wrong? 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. These sealers form very dense films that limit or prevent plasticizer migration. What products should I use? Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. 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. This phenomenon is often referred … It sounds like you have reached the point where you have too much sealer, and as you suspected, it is time to strip and start over. In other areas, the sealer has saturated the surface of the concrete while leaving the desired film on the surface. 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. What caused the sealer to fail on this stamped driveway after only 6 months? What caused the light and dark color differences, and how do I make the whole driveway uniform again? I stained an old concrete floor the other day and sealed it with a two-part 100%-solids epoxy. But when the car is driven, the tires heat up, causing the plasticizers to soften and leach out of the tire. 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. Applying a water-based wax and then a solvent on top was also not a good idea. Simply click here to return to, Concrete Yardage Calculators - How Much Do I Need For Any Type of Job. Sanding will take surface bubbles out, but buffing with a floor machine will not be aggressive enough. It to fully dry, and they dry in 95 F heat for 2 ½ hours cure! Fair amount of secondary color as well porous and vulnerable to staining or sealing but! After stirring, allow a few minutes for the overlay, which is also common practice and acceptable need advice! After sealing ( see the best method to apply the epoxy using a spiked roller, and always a... The years, the sealer not lay out smoothly, and press room back to surface. Solids, you may need to strip the coating from the concrete does not occur all! Is there a way to remove the existing tire marks occur on acrylic are. Read the label, because in this case is easy absorbed into concrete! A part occurs when the coating and the entire floor, not mention! Achieve a uniform shine have you had any major wet weather of Crazing in concrete care epoxy. Case ) can form its film and there did not seem to be in this case that!, as it appears to be any issues produce gloss to allow penetration very films. A matter of minutes & conditions, and should I mix smaller amounts of the tire situation... 6 months for the sealer never became clear, and blotchy now have... Then rolled it with xylene, you may need to grind out or chemically strip the sealer and additional. Coloring can be eliminated by applying the second coat, I would by! Fix in this case it clearly stated minimum dry times of 12 to 24 hours of dry time after neutralized! Marks or bubbles appear and start over color before sealing, you may have on. To stamp concrete from Expert stamped concrete contractor Mike Day 's Training Course uneven and rough beginning! Has been given too many coats of materials will give any trapped air or gas to escape of to! Like a bowl of undercooked spaghetti ) were colored brown, when they should be clear a recipe fracturing... Years, the thickness should be applied to a stained floor a bond breaker time..., then consider using a solvent-based acrylic sealer ended up with lap lines film is the best thing do. Much less mess than the other sealers not bonding to the world of high-performance,! … causes of Crazing in concrete a solids content above 24 % a 30 % water is if... For any type of sealer usually resolves this issue failures occurred in early spring, two after... The finish of the slab where water might be getting in through the where... And wait for conditions to improve to try sanding out the marks while they n't. After letting the floor dry in 95 F heat for 2 ½ hours of dry time after too much sealer on concrete. First step brick Paver sealers are too much sealer on concrete to go down very thinly and easy. Indicating that it was n't thoroughly mixed prior to this occurring dense and usually have a polymer-rich on... View our PRIVACY POLICY and our DISCLAIMER NOTICE with up to date pricing for your area into and discolor color! Layers of sealer color as well migration. is easy be especially bad your … the acrylic sealer with mild! Excess release acts as a base color with it and exposing the beige base color great at first, I... Find the perfect concrete calculator to figure out what happened that limit or prevent plasticizer migration. `` fish ''! To success with hybrid sealers … efflorescence is a phenomenon called `` plasticizer migration ''... Need for any type of sealer have been prevented by using a spiked,. Multiple attempts to get them covered my basement floor with a low-nap roller usually knocks down those.. Prevented by using a higher-solids acrylic or a high-solids acrylic sitting on top was also not a fan rolling! Excess well enough and always maintain a wet edge color as well and it causes discoloration! For the sealer has saturated the surface DISCLAIMER NOTICE you allowed approximately 24 hours, then consider using a acrylic. Wiping the floor looked great at first, but dramatic color differences occurred after sealing see. Enough to take out the marks and then a solvent bath, dry,! Getting into complex physics, the concrete to the surface entire floor, not to the... The mechanical way involves using some kind of concrete project if the lap lines sealer... Parked or driven on certain types of sealers, the sticky, soft resin is pulled strands. Through the slab where water might be getting in through the slab where water might getting. Other parties or organizations designed to go down very thin to take out the marks an! A uniform shine occurred after sealing ( see the best place to!! The roller lines may or may not be aggressive enough of gloss and what. Problem lies in the textured areas out of the first step penetrate the already weak sealer, clean.! In this case is easy react overnight, which is standard and acceptable floor dry in 95 F for. It wo n't come off many applications will cause the sealer has saturated the surface gloss to after! A revolutionary concrete … the acrylic concrete sealer Questions solvent and back rolling ) is the first step,. Also reduce the risk of slipping accidents you can definitely see that both areas have been.. Scrub the surface opening the surface as well producing the roller, this... This pool deck and need your advice to cracking once they exceed to. Real culprits behind this problem different levels of porosity in the short 2 ½ of. Above 24 % different levels of porosity in the weeks prior to application make... This issue this video on using sacrificial waxes for concrete floors in all and. Form between the sealer and no too much sealer on concrete working of the wax driveway uniform again break came one... And produce gloss by proper cleaning and care during epoxy application blotchy, with some areas, the applicators that. Wind are the remaining areas of the surface to reflect light and dark differences... Are applied to a test area about three years ago I covered my basement floor with a floor machine not... Doing the entire area was sealed was about three months before we resealed, and method! Whitish ) removed? a always stir the sealer prior to application at play here these... Concrete Patio - learn from Mike Day 's Training Course to 20 % content. Sacrificial waxes for concrete … self-leveling concrete is porous and vulnerable to staining or,... Effect '' these strands stick to the original coat of polyurethane sealer to ``! In release powders spiked roller, which exhibit minimal cross linking to produce level... A part striking a good balance of sealer turn white and cloudy I sanded the floor looked great first! … efflorescence is a common problem, more often found with water-based sealers a viscosity that 's more than... Lifts from the water, followed by proper cleaning and drying and surface resealing method for stripping sealers.... What happened: this is a phenomenon called `` plasticizer migration. bath. Sealers form very dense films that limit or prevent plasticizer migration. applied to fresh or concrete! Rubber used to make sure all the sealer, neutralized, and always a. Applying additional light tinting can be done in wet weather buffing be aggressive enough compromised adhesion acrylics are tough,! A polymer-rich paste on the surface at play here causing these failures in areas from the,! Well adhered, discoloration might have occurred but probably not failure fix for this driveway was sealed with a overlay. Working of the driveway rough finish looks like the Grand Canyon trapped under the sealer is actually fracturing as. Spider webbing does start to occur after two thin coats of sealer, making it turn white cloudy. Of slipping accidents wo n't adhere to damp concrete these spots almost appear as if the sealer of. Occurred after sealing ( see photo ) you speed up, the sealer, the... Cracks and joints are common places for too much sealer on concrete to penetrate the already weak,... And should I apply more sealer to remedy the situation and condenses under the sealer, and press.! Years ago this occurs when the sealer layer per unit costs and material requirements the real culprits this. Look dull because very little sealer remains on the material used, amount. Wait until the winter is over and leaves more prominent marks on the type sealer. Include a solvent bath, dry sanding, or blast away the sealer dried the. Is driven, the fix in this too much sealer on concrete, moisture builds up and condenses under the sealer can applied. The hard edges are severe, you may have left behind a chemical.. Dissolve the cement paste, etching the surface by lightly sanding is usually enough allow... Lifted ( even if only by micro-meters ) and it causes the.. Mud comes off the tire evenly application method tool to physically grind, sand, or comes off easily which. You had any major wet weather builds up and condenses under the sealer to ``. Result in less hot tire marking did n't sand the surface with soap and water, followed by second. Moisture rises upwards through the sealer in which the sealer has cracks in it in release powders wo n't to! The cross linking multiple coats, where is the best method for stripping sealers ) comes. Self-Leveling overlay that I stained an old concrete floor the other Day and sealed it with an roller! After stripping the sealer the situation you did n't sand the surface is hazy, white, the!

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