Epoxy.com Product #699 Methyl Methacrylate (MMA) Sealer and Top Coating

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Epoxy.com Product #699

Low Viscosity Methyl Methacrylate (MMA) Sealer

Chemical Resistant Sealer Top Coating - Superior Flow & Leveling, Scratch Resistant


Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer is a 100% reactive, low viscosity methyl methacrylate resin developed as a chemical resistant sealer/topcoat. Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer cures to a hard, scratch and wear resistant surface and is specifically designed for dry service in areas subjected to high traffic such as manufacturing areas, aisles, lobbies, service areas, and numerous other applications.


  • UV Resistant
  • Superior Scratch and Wear Resistance
  • Higher Temperature Resistance
  • Superior Chemical Resistance.
  • Lower Viscosity - Excellent Flow for Leveling
  • Fast Setting - Less than 1 Hour
  • 100% Reactive


  • Concrete must be clean and free of all oil, grease, paint, dirt, sealers, laitance and any other foreign material that might interfere with proper bonding.
  • Do not store Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer in direct sunlight, storage temperature must be  less than 80 ° F.
  • On or below grade applications should have a moisture vapor barrier under the slab. Maximum vapor transmission must be less than 3 lbs per ASTM F-1869 and less than 80% RH per ASTM F-2170.


Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer is a 100% Solids Methyl Methacrylate (MMA).

Surface Preparation

Good surface preparation is the first necessary step to successful installation of all Resinous Flooring System. All substrates must be clean and free of all oil, grease, paint, dirt sealers laitance and any other foreign matter that may interfere with proper bonding. Follow the directions for surface preparation as outlined in Epoxy.com Surface Preparation Guide.

Epoxy.com Epoxy Color Chart Here

Color Selection

Can be used clear (with a slight blue tint). Color packs are available in selected colors. Color pack mix ratio is 1 QT color pack per 5 gallon pail of Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer and Top Coating Resin.

Mixing and Installation

Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer and Top Coating Resin requires the adding of Epoxy.com Product #695 Hardening Powder. to start the hardening process. The amount of hardener must be adjusted to the respective surface temperature (see table below). At temperatures below 40°F, Epoxy.com Product #696 Accelerator must be used, contact Epoxy.com Technical Support for a recommended dosing.

In order to achieve the best curing it is necessary to apply  Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer with a short nap roller. Coating thickness should be a minimum of 10 mils and maximum of 20 mils (80-160 sq ft/gal.) depending on the profile of the base material. One hundred (100) sq ft/gal. is average. If the coating exceeds 20 mils, the top coat may remain visibly blue or yellow and surface cracks are possible. It is best to spread material with a notched trowel or squeegee to the desired thickness, and roll in one direction, then roll in a 90° pattern. This will reduce the occurrence of roller marks in the top coat.

Temp. (°F) of Resin, Air & Floor Surface

Hardener % by Wt. Based on Wt. of #699 Resin

Hardener by Vol. (oz.) Based on Gallon of #699 Resin

Pot Life (min.)

Hardness Time (min.)

+401.53Approx. 40Approx. 55
+501.53Approx. 30Approx. 40
+601.53Approx. 25Approx. 35
+701.01.8Approx. 15 Approx. 20

Hardener concentration greater than 2% by weight or 4 oz. by volume might lead to discoloration (yellowing). Epoxy.com recommends waiting 2 hours between coating and sealing. Coating work has to be continued after the complete hardening of the previous layer.

Physical Properties

Basic Material    Methyl Methacrylate Resin (MMA) 
Percent Reactive100%
Appearance  Clear Low Viscosity Liquid (with slight blue cast) 
Viscosity, cps@ 73°F     185-195
Weight per Gallon 8.35 lbs
Recoat Time 2 hours±
Pot Life Min
(Varies with Temp)
Cure Rate (min) 20-55
Heat Resistance 216°F
Shore D Hardness75-80


Clean tools and equipment with lacquer thinner or MEK. Consult Material Safety Data Sheet for safety and health precautions.


100 square feet per gallon, average.


Contact Epoxy.com Customer Service Department


Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer is considered to be a very low maintenance flooring system.  With some textures and conditions it may have to be cleaned by bristle brush or low pressure wash. Due to the thermoplastic character of Methyl Methacrylate (MMA) resins, you may get black marks from fork lifts and tire skidding.


Store Epoxy.com Product #699 Low Viscosity Methyl Methacrylate (MMA) Sealer in a cool and dry place, below 80°F, out of direct sunlight. Do not store near open flame or food. Shelf life is 4-6 months in the original unopened containers.


Adequate cross ventilation should be provided. Good ventilation during the processing ensures a good cross linking and hardening. Read, understand and follow Material Safety Data Sheets and Application Instructions prior to use.

Use only as directed. If substrate and/or material temperature is above 90°F, DO NOT apply material.

Technical Support

Call Epoxy.com Technical Support Department with any technical support questions.

Proper mixing and installation is critical to the optimal success of all product.  See Installation Tips, Techdata, & MSDS for more details on our products.  Be sure to contact us with any questions and/or concerns that you have.

For more information please contact:

A Division of Epoxy Systems, Inc
20774 W. Pennsylvania Ave.
Dunnellon, Florida 34431
Hundreds of Systems,
Since 1980 - 35 years
Florida & Vermont

Customer and Technical Support Hours: 9AM-4PM Eastern Time (6AM-1PM Pacific Time).
Closed 12 Noon-1PM Eastern Time for Lunch

321-206-1833  Customer Service - Ordering and Order Status
                         Katey Fontaine, VP - Customer Service Director

                        Technical Support
352-533-2167  Norm Lambert, President - Technical Support Director 

352-489-1666  Accounting and Administration
                         Debby Lambert, CEO, and CFO

352-489-1625   Fax line to all Departments

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