WARNING!!!!! Be sure to select the proper VOC version for your area!
Standard VOC version CANNOT be shipped to California, Connecticut, Delaware, District of Columbia, Illinois, Indiana, Maine, Maricopa County of Arizona, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Northern VA, Ohio, Pennsylvania, Rhode Island, Northwest Utah or Vermont.
All other states EXCEPT California may purchase either version. NO version of this product can be shipped to California. If you are in California please do not try to order this product. We WILL NOT be able to process your order!!!
MMA-25 is a solvent based, 25% solids pure acrylic sealer for all types decorative concrete. MMA-25 offers excellent color enhancement and a rich Wet Look with a gloss finish. MMA-25 is also a great choice for interior floors and many other applications where a premium 25% pure acrylic is desired.
MMA-25 is formulated from a unique 100% pure methyl-methacrylate acrylic resin. This premium resin makes MMA-25 the ultimate multi-use concrete sealer with better chemical, weather and wear resistance than normal acrylic sealers. Since MMA-25 is a pure acrylic, it will never yellow from UV exposure like styrene-acrylics. Pure acrylics should only be applied to concrete that is fully cured (28+ days). MMA-25 offers easy application by roller or sprayer.
What's up with all these acrylics? What's the freaking difference? Which is right for me?
As you search for the "perfect sealer" you will likely come across hundreds of solvent-based acrylics, all in a different shiny can, and all claiming to be the "best sealer ever invented". Truth is, there are only a few basic differences in solvent-based acrylics that are even noticeable to the average user. Many (if not most) are the EXACT same products private labeled over and over with new claims to fame. Here are the three basic things you should be looking at when choosing a solvent-based acrylic:
Acrylic Formula - Pure Acrylic or Co-polymer? Pure acrylics are typically a little more durable than co-polymer (styrene-acrylics) and will not yellow with UV exposure. Pure acrylics should only be applied to cured concrete (28+ days old). Styrene-Acrylics are often referred to as "cure and seals since they can be applied to freshly poured concrete. The addition of styrene into the formula allows for a bit of breathability. Because of this, styrene-acrylics are a little more forgiving if you apply them over concrete that has a higher moisture content. Unfortunately, they typically don't last as long and most will "yellow" to some degree over time with UV exposure, no matter what the manufacturer says.
Solids Ratio - This is simply the ratio of acrylic to solvent in the product. The most common ratios are 25% and 30%. Simply put, 25% products contain 5% less solids than 30% products. This means a 25% product is a bit thinner, penetrates deeper and is sprayable. Usually both produce the same gloss finish, but because the 25% leaves a thinner film and penetrates deeper, it appears more of a semi-gloss than a 30%. It has been our experience that 25% products will consistently outperform 30% products due to their superior penetration. Thinner films are also less likely to flake, peel or chip than thicker films. The exception is exposed aggregate where a thicker product is often needed due to the additional texture and porosity.
VOC content - This has to do with the types of solvents that are used in the formula. Many local, state and regional laws now regulate the amount of VOC's a product can emit. This means "low VOC" formulas usually contain higher levels of "exempt" solvents like acetone and butyl-acetates. For the most part this does not change the quality of the product, but it does affect the drying speed. Typically "low VOC" solvents evaporate more quickly, which gives the sealer less time to penetrate and/or bond to an existing coating. Delamination is a big problem with low VOC solvent-based acrylics when applied in hot temps or direct sunlight.
So.... If you are looking for a solvent-based acrylic, consider the attributes of each and make the best decision for your situation based on facts, not brand, packaging, marketing or online sealer review sites just trying to market the products they sell.
Check out the "Help Center" above, send us an email or just give us a call and we'll be glad to help you with your order!
MMA-25 is Awesome!
Easy to Apply and Extremely Durable.
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MMA-25 is a solvent based 25% solids pure methyl-methacrylate acrylic sealer for all types of decorative concrete projects. MMA-25 offers excellent color enhancement and a rich Wet Look with a gloss finish. MMA-25 is is available in both "standard VOC" and "low VOC" to accommodate laws in all states except California.
Like most "low VOC" solvent-based products, the "low VOC" version of MMA-25 dries faster than the standard version. for this reason we recommend special care be taken to avoid application of this version in hot temperatures or direct sunlight. The "low VOC" version is great in situations where a fast-drying product is needed, no matter what your local regs are.
If you are in a low VOC area, we encourage you to carefully explore all of the options available to you. You can find a complete list of available low VOC sealers HERE.
MMA-25, along with most solvent-based acrylics, is compatible with many other similar solvent-based acrylics that may already exist on previously sealed concrete. Solvent-based acrylics should never be applied over any existing water-based sealer. If your concrete has an existing water-based sealer, it must be removed before applying MMA-25. If you have an existing water-based sealer or a "Mystery Sealer", you may also consider other products like Seal-n-Lock SuperWet, which can be applied over many compatible water-based sealers as well as most solvent-based sealers.
Cleaning and Preparation Instructions
1. Completely remove all oils and contaminates from the surface. All previous sealers or coatings must be removed before application unless they are a compatible solvent-based acrylic. Use only cleaning methods suitable for the substrate you are cleaning. Clean oily concrete with our Concrete Degreaser. Use a bristle brush for heavily oiled spots. Area to be treated must be clean, porous and sound.
2. Use only the amount of cleaners necessary to remove contaminates, oils, fluids and sealers from the substrate. If using acidic cleaners to etch surface or to remove efflorescence, calcium, rust, etc, be sure to neutralize and restore pH with Balance Neutralizer. Rinse thoroughly! Surface and pores must be clean, dry and free of all chemicals before applying MMA-25.
3. If using over cured trowel finished concrete, diamond grinding is always recommended to open the surface and allow adhesion of the sealer. Do not grind finer than 100 grit. Beyond 100 grit, sealer adhesion will be compromised. Dry grinding is highly recommended to avoid introduction of moisture into the concrete. If diamond grinding is not possible, first etch with Surf-Prep.
4. Allow area to dry completely.
Always test in an inconspicuous area before use to ensure compatibility and desired results!
MMA-25 may be applied using a roller or industrial concrete sprayer. Use a long nap roller for exposed aggregate, a medium nap roller for textured surfaces and a short nap roller for smooth surfaces. The Standard VOC version may be sprayed with either the Chapin 1949 Sprayer or Chapin 19049 Xtreme Sprayer. The Low VOC version should only be sprayed using the 19049 Xtreme Sprayer due to it's higher concentration of acetone. Do not allow to Puddle! Thick or puddled areas may prevent the solvent from evaporating and may be susceptible to moisture intrusion which may cause milky white spots. Applying too thin may cause sealer to prematurely delaminate, flake or wear away. Allow sealer to dry for 24 hours for light traffic and at least 48 hours for heavy traffic. If applying two coats, wait approximately 4 – 6 hours between coats. Do not thin product.
Make sure all sprinklers are turned off for a 24 hour period of time. Apply MMA-25 only if rain is not expected for at least 24 hours. Do not apply MMA-25 if surface temperature is below 40° F., or above 80° F. If possible always apply as concrete is cooling, rather than as concrete is warming. Warming by the sun causes the air inside the concrete to expand and push out through the surface, often causing bubbles in the still wet sealer.
MATTE FINISH ADDITIVE: If a low gloss, matte or satin finish is desired, Matte-50 Matting Additive can be added to create the exact gloss level you desire. Follow directions on Matte-50 for mixing instructions. For most consistent results, add Matte-50 to both coats.
SLIP RESISTANCE: Surface Grip may be used for additional slip resistance or added texture. Adding Surface Grip is a great way to reduce slip and falls, reduce gloss/reflection and also hide minor imperfections in the concrete. Follow mixing instructions and do not overload system. When using a non-skid additive in acrylics, do not add to first coat. Add it to second coat. The addition of an anti-skid additive will make spraying difficult, so soll-on application is typically recommended when using Surface Grip. All non-skid additives may shorten the life of the film to some degree.
CLEAN UP: Clean up tools with A1 Solvent or Xylene.
Of course, having the right tools will make your job easier, so scroll to the bottom to see our recommended Sprayers, Rollers and Application Tools!
Coverage Rates: Coverage rates are approximate and will vary depending on substrate density, porosity and temperature. In most cases, two thin coats are recommended. Coverage rates based on total combined two coat application.
Stamped concrete: 200-250 sq. ft. / gallon
Exposed Aggregate: 100 sq. ft. / gallon
Broom swept concrete: 150-200 sq. ft. / gallon
Troweled concrete: 200-250 sq. ft. / gallon
Like all things, maintaining optimal protection of a sealed surface requires scheduled maintenance. Once properly applied, surfaces sealed with MMA-25 may periodically require a light cleaning to remove dirt, dust, mud, etc. In most cases, low pressure water is all that is needed for routine cleaning. Do not use a hot-water pressure washer unless you are preparing to apply a maintenance coat of MMA-25. Re-seal surface every two years or as needed to prevent buildup of sealer. For interior floor applications, we recommend periodic waxing to maintain finish and reduce scuffs and scratches.