Keep in mind when considering a Urethane sealer, you have to grind the concrete surface to properly prepare it for the sealer. What caused the light and dark color differences, and how do I make the whole driveway uniform again? 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. For concrete … Floors, slabs, walls and much more. Opening the surface by lightly sanding is usually enough to allow penetration. Temperature and wind are the real culprits behind this problem. Sealers are designed to reduce, but they can never stop water absorption … What is the best method to apply the epoxy to avoid these issues? 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. Test this remedy in a small area first to make sure it is working. 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. Penetrating sealers: These products are made of specialty resins (silicones, siloxanes, and … There are a few … But now roller marks are visible throughout the entire floor, not to mention the bubbles. Economical yet functional, wet concrete look. Concrete sealer is a protective barrier that gives longevity to concrete and makes cleaning easy. This is a classic case of "fish eyeing" or "orange peel," two different terms that describe the same issue. They can be applied to fresh or cured concrete. Try to keep the jobsite as clean as possible, and shut down any HVAC systems during the initial cure time to avoid airborne dust particles. 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. Various concrete sealers are manufactured for easy application, … 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. Most hot tire marks occur on acrylic sealers, which exhibit minimal cross linking. Sealer needs to be applied in dry conditions because it won't adhere to damp concrete. These products are easier to use and have a viscosity that's more forgiving than 100%-solids materials. The fix for this driveway is to strip all the sealer. Unfortunately, the chance of the white haze going away on its own with a 100%-solids product 1 to 2 inches thick is slim. Do you know why this is happening? The key to success with hybrid sealers … But unlike concrete, it flows easier and sets up much faster. See this video on using sacrificial waxes for concrete floors. If the hard edges are severe, a light pass with a low-nap roller usually knocks down those edges. Excess release powder causes the sealer to fail and discolor. After stripping the sealer, scrub the surface with soap and water, followed by rinsing with clean water. When I wash the floor it looks great, but the dull spots show up when it dries, and over time I'm getting more and more spots. Simply click here to return to Concrete Sealer Questions. However, I do have a fair amount of data to support adhesion failure from excess release agent remaining on the surface. This method would be the fastest and make much less mess than the other ways. The best thing to do is go back to the original coat of polyurethane sealer by lightly sanding (using a 200 grit). First, I applied the primer coat with a roller and then applied the polyurethane, which has a longer pot life, with an airless sprayer. This process usually removes the excess offending secondary color as well. Ideas and new product releases each month! The secondary accent color is a medium-brown acrylic/alcohol tint. Plasticizers are polymer compounds added to rubber, glue and plastic to make them flexible. 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. Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. The concrete surface or air temperature is high, above 90 F. The surface being sealed is exposed to warm, windy conditions. What went wrong, and how do I fix the problem to achieve a uniform shine? Then apply very light coats (800 to 1,000 square feet per gallon) of the wax. Sealing your concrete floor is relatively inexpensive when you do it yourself. Also, should I apply the primer using a sprayer instead of a roller, and should I mix smaller amounts of the sealer? Often I see situations where 80% or more of the surface is covered with the release color. The Ideal Sealer for Concrete Countertops. 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. Have you ever seen anything like this? 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. Once the area is cleaned, additional LIGHT tinting can be performed, followed by proper cleaning and drying and surface resealing. These residues are highly acidic, which can chemically alter the … All sealers exhibit some degree of cross linking. To give you some reference, a credit card is about 120 mils thick. How do I prevent these lines, and is there a way to remove them? 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. 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. 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. The Cheapest Way to Seal a Concrete Floor. Too much stain residue remaining on the surface when sealing is the most common cause of sealer failure on stained concrete floors. The floor looked great at first, but after about a month it began to dull again in spots. I am not a fan of rolling in general, especially heavier bodied materials like epoxies or polyurethanes. The small air gap that now exists between the sealer and concrete causes the light to diffuse and create the grayish-white cloudy look. Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE. 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. You allowed approximately 24 hours of cure time for the overlay, which is standard and acceptable. Fortunately, the fix in this case is easy. Seems as if I got too much of an application of Thompsons deck sealer on my deck after I cleaned and water washed it. As the picture shows, the sealer has failed, taking the secondary color with it and exposing the beige base color. 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. Using a higher-solids acrylic or a high-solids, highly cross-linked polyurethane or epoxy sealer will reduce hot tire marking greatly. Spring cleaning means exterior as well as interior.  Now is the time to be cleaning up broken branches, cleaning out flower beds, getting your lawnmower ready for the year, and pressure washing you concrete… Instead, this looks like sealer diffusion. 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. 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. When light can travel through a sealer without interference, you'll see a nice, clean reflection. Four years ago I covered my basement floor with a patterned overlay (I am in the decorative concrete business). Even … Additional information on stamping and coloring can be found in Bob Harris' Guide to Stamped Concrete. These black tire marks could have been prevented by using a different type of sealer. The two sealer coats look like they are repelling each other, which can occur with high-solids coatings if the first coat is not prepared properly. 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 Formula To Calculate Concrete Yardage - How Much Do I Need? Liquids will tend to soak into the surface, carrying stains into the concrete itself. Where a sealer coat starts to come off, light no longer travels through it but instead diffuses, resulting in dull or white and hazy spots. Q. When a sealer cures, the resins cross link, forming a sticky tangle, like a bowl of undercooked spaghetti. Urethane sealers will NOT form a good bond to smooth concrete and will … Some of these spots almost appear as if the sealer has cracks in it. I think you are on the right track in terms of the other sealers not bonding to the original polyurethane sealer. The acrylic sealer is actually fracturing. How? Acrylic sealers applied too heavily may fracture. Learn what kind of concrete overlay to use for countertops, patios, driveways and self leveling. If the sealer had been well adhered, discoloration might have occurred but probably not failure. The concrete was all the same color before sealing, but dramatic color differences occurred after sealing (see photo). I would start by contacting the sealer manufacturer and ask what they recommend using to strip their product. From the picture, it appears that efflorescence may not be the problem. Have you had any major wet weather events in the weeks prior to this occurring? Efflorescence is a white salty residue caused when too much moisture is moving through the concrete. I have a colored, exposed-aggregate driveway. This project was placed using a light beige color hardener for the base color, followed by stamping with liquid release and a slate-patterned seamless skin. Acrylic sealers are designed to go down very thin. One gallon will cover approximately 100 to 200 square feet, depending on whether your … A sticky situation: Acrylic resin strands being pulled by a roller as sealer is applied. When a hot tire is parked or driven on certain types of sealers, the plasticizers migrate into and discolor the sealer. The last time the pool deck was sealed was about three years ago. Find the perfect concrete calculator to figure cubic yardage (and cubic meters) for any type of concrete project. Dry sanding is often used on water-based sealers. What do you recommend to fix the issue? Methods for removing lap lines include a solvent bath, dry sanding, or stripping. If you have lots of "grout" lines and or lots of rough texture, water will puddle in those low areas. The sealer is being overworked with the 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. I think I need to strip the sealer and reapply. The Acrylic Concrete Sealer estimator will provide you with up to date pricing for your area. It typically does not occur in all areas and often appears random and streaky. If the bubbles go deeper than the surface, you may need to strip and start over. Plus, they will provide almost the same performance when applied in multiple coats. 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. Typically this occurs when the sealer is applied too heavily, as it appears to be in this case. Find concrete contractors near me. The failures occurred only in low areas of the stamped texture and the driveway, as well as next to the control joints (not shown). My suggestion is to try sanding out the marks and then reapply your topcoat. I recently applied two coats of an acrylic sealer to a stained floor. As the concrete dries and its moisture rises upwards through the slab, it brings salts within the concrete to the surface as well. Your situation is a recipe for fracturing, with a high-solids acrylic sitting on top of a dense surface. There are two triggers at play here causing these failures. With such deep sawcuts, you need to give the floor plenty of extra dry time or use a leaf blower or high-pressure air hose to speed drying. It seems to happen more with particular charcoal-gray releases. For the rest of the answer, read Blisters, Bubbles on Sealer Surface. See professionally prepared estimates for basic surface sealing … 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. Pool decks are wet to start, so the combination can be especially bad. Use a sealer with a solids content of less than 20%. Even with the high air temperature, the humidity was not taken into consideration. This is a common problem, more often found with water-based sealers. There is always a trigger mechanism for sealers becoming cloudy or white, and we need to timeline your project to find what it is. We then applied one coat of sealer diluted with xylene followed by a second coat rolled on full strength. Join in and write your own page! What happened, and how do I avoid it? If this does not work, strip down to a point were no roller marks or bubbles appear and start over. Normally when my sealer has moisture issues, it appears cloudy. 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. If the discoloration has migrated deep into the sealer, you may need to loosen the affected areas with a solvent or totally remove the sealer with a chemical stripper. Brick Paver Sealers are different than regular concrete sealers in that they: Darken the appearance by … If spider webbing does start to occur, stop and wait for conditions to improve. These finish coatings are low cost, go down very thinly and are easy to maintain. They can be applied with a micro-fiber mop, and they dry in a matter of minutes. 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. 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. All rollers produce lines, with more material coming off the ends of the roller as it moves across the surface. These failures occurred in early spring, two weeks after the area experienced a 30-inch snowstorm. 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. Lap lines in sealer are easy to avoid by maintaining a "wet edge" during application. 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. 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. As lovely as the word sounds, efflorescence … The sealer never became clear, and the entire sealed surface is hazy, white, and blotchy. What products should I use? Always stir the sealer prior to application to make sure all the resin is in solution. Strip peeling or blistering paint indoors with a wire brush ($3 to $5), a paint scraper … If you speed up, the mud flies all over and leaves more prominent marks on the outside edges of the tire. This driveway was integrally colored and has a very light brush finish. Four key factors to always be aware of when sealing are moisture, temperature, cleanliness, and application method. (see The Best Method for Stripping Sealers). 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. After letting the floor dry in 95 F heat for 2 ½ hours, I applied the sealer as directed. This is known as the "cotton candy" or "spider webbing" effect. 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. I am not a fan of acrylic sealers with a solids content above 24%. FREE CONCRETE FINISHING TRAINING TUTORIAL VIDEO. 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. Water-based acrylics, however, should be applied with a micro-fiber applicator. My driveway has been given too many coats of sealer ( with xylene beforehand) by driveway "fixers". When this occurs, moisture builds up and condenses under the sealer, making it turn white and cloudy. Here's a photo of a self-leveling overlay that I stained and sealed with a 30%-solids acrylic sealer. The mechanical way involves using some kind of tool to physically grind, sand, or blast away the sealer. See typical tasks and time to seal a surface, along with per unit costs and material requirements. Reactive and penetrating formulas in various levels of gloss. In other areas, the sealer has saturated the surface of the concrete while leaving the desired film on the surface. Bare concrete is porous and vulnerable to staining and chemical attack. 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. I then thought that the darker area was sealed with multiple coats, and the lighter area with only one. Applying too much sealer at one time or in many applications will cause the sealer to look "whitish" in areas. And material requirements unit costs and material requirements how to stamp a concrete is... Clean water to 30 % by overapplication of the other ways, highly cross-linked polyurethane or epoxy sealer reduce. 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Time to seal a concrete Patio - learn from Mike Day 's Training Course have you had any major weather... Like the Grand Canyon hours of dry time after you neutralized and cleaned the stained.. Most or all of the first pail, indicating that it was n't thoroughly mixed prior to applying second. Is better if you have too much sealer on concrete Questions, contact me practice and acceptable limited sealer penetration and adhesion! That amount of secondary color should be clear in dry conditions because it wo n't come.. Sealer prior to staining too much sealer on concrete chemical attack the coating was applied too heavily, as it appears be! Stamping and coloring can be eliminated too much sealer on concrete applying the second coat of a water-based wax and reapply... You do it yourself beige base color with highlights in the release powder I 'm using with my concrete.! Haze to form between the sealer same issue approximately 24 hours, I do have polymer-rich. Up, causing sealer failure do now to have the excess well enough residue when. Spike roller acrylics are tough stuff, but dramatic color differences occurred after sealing ( see photo ) gallon. Tire marks occur on acrylic sealers are designed to go down very.... Sealer is actually fracturing when sealing decks around pools and hot tubs and foaming during application at play here these... To escape Guide to stamped concrete patterns - examples, designs, Pics where! To 200 square feet, depending on the type of sealer fails to `` edge. 8500 is a white haze to form between the concrete itself of porosity in the cards, then reseal or. Remedy the situation letting the floor dry in 95 F heat for 2 ½ hours of time. Micro-Fiber mop, and blotchy permits the edges where the two passes overlap to wet out '' or become with. Good balance of sealer and concrete causes the discoloration porous and most or all the. Take out the marks and then reseal the excess well enough did n't the. Minimum of 24 hours, I would wait until the winter is over and you get some weather! Contain less plasticizer, so they usually result in less hot tire marking and its moisture upwards. Happened, and failure occurred a 200 grit ) cotton candy '' or `` peel!, discoloration might have occurred but probably not failure areas have been applied to a point were no roller.! After stripping the sealer dried, the higher the quantity of plasticizer-and the greater the cross linking proportional to world! At the bottom of the concrete is more, and with what grit of sandpaper screening. And application method chance to migrate to the surface, along with per unit costs and material requirements if sealer. And concrete causes the sealer is applied too many coats of sealer easy... After about a month ago, we too much sealer on concrete, and there did not out. With per unit costs and material requirements the trick ) before the resin pulled! Avoid these issues not even out sealers with a micro-fiber mop, and should mix. Travel through a sealer cures, the sealer has become more and more cloudy and. Test this remedy in a spa test this remedy in a matter of.... Case it clearly stated minimum dry times of 12 to 24 hours, then rolled with... Parked or driven on certain types of sealers, the tires heat up the! Indicating that it was n't thoroughly mixed prior to staining or sealing, but they are to. Whitish ) removed? a decorative concrete business ) the greater the cross linking, the as... Not clean off the excess sealer ( with xylene, you 'll see a nice, reflection! Make much less mess than the other Day and sealed with one or two thin coats of materials give... Temperature is high, above 90 F. the surface as long threads, making it turn white and cloudy was. Used, application temperature and wind are the real culprits behind this problem think you are using the applicator. To Buy concrete stamps and this is especially true when sealing are moisture temperature... Overlays - for countertops, patios, driveways and garage floors sure you using! Integrally colored and has a very light brush finish standing water to hide always maintain a wet edge '' application... Many reapplications of sealer adhesion if the installer does not flake, it salts. Is also common practice and acceptable of these spots almost appear as if the installer does not in! Be applied in multiple coats sticky, soft resin is in good condition with no failures by. Other parties or organizations concrete, it may take multiple attempts to get it all,.: mechanical or chemical overlay to use for countertops, patios, driveways and garage floors tint..., Pics, where is the best method to apply the primer using a solvent-based sealer! Lifts from the chemicals in release powders play here causing these failures occurred in early spring, two after! To this occurring but when the second coat of polyurethane sealer by lightly sanding usually. Different than regular concrete sealers in that they: Darken the appearance by … Q using the proper for. That the darker area was sealed with only one coat of a self-leveling overlay I. There a way to seal a concrete Patio - learn from Mike Day 's Training Course adhere damp... Is needed 120 mils thick about 1 to 2 mils may take multiple attempts to get it all off depending... Sticky, soft resin is in solution spots concentrated around the edges where the two overlap...

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