Epoxy.com Product #692 Flexible Methyl Methacrylate (MMA) Flooring, Decking Bridge Mortar Resin is a higher viscosity, 100% reactive, flexible methyl Methacrylate resin used as a crack isolation or waterproofing membrane under Epoxy.com MMA Systems. Epoxy.com Product #692 Flexible Methyl Methacrylate (MMA) resists cracking caused by horizontal substrate movement providing a crack resistant, resilient surface. Epoxy.com Product #692 Flexible Methyl Methacrylate (MMA) offers stress relieving properties for floor slabs showing movement and/or vibration.
Epoxy.com Product #692 Flexible Methyl Methacrylate (MMA) Flooring, Decking Bridge Mortar Resin is a 100% reactive methyl methacrylate resin.
Epoxy.com Product #692 Flexible Methyl Methacrylate (MMA) is supplied clear (slight haze). Color packs are available for selected colors. Color pack mix ratio is 1 quart pigment per 5 gallons resin. See Epoxy.com MMA color card.
Surface preparation is the most critical portion of any successful resinous flooring system. All substrates must be prepared as indicated on the Epoxy.com Surface Preparation Guide.
Epoxy.com Product #692 Flexible Methyl Methacrylate (MMA) is typically used in conjunction with fillers and fine aggregate and requires the addition of Epoxy.com Product #695 MMA hardener to start the hardening process. The amount of hardener must be adjusted to the respective surface temperature (see table). At temperatures below 40°F, Accelerator 101 must be used in addition to the amount of hardener used at the 40°F level (about ½ oz by vol./gal. @ 32°F up to 2.0 oz by vol./gal. @ -20°F).
Typical Slurry/Topping Formula | ||
| Material | Weight | Volume |
| Epoxy.com Product #692 | 8.4 lbs. | 1.0 gal. |
| Epoxy.com Product #78 Leveling Filler | 20 lbs. | 1.8 gal. |
| Pigment Pack | N/A | 6.4 Vol. oz. |
| Epoxy.com Product #695 MMA Hardener | Follow chart | Follow Chart |
Add hardener to the clear resin and blend; add dry powders and mix thoroughly with propeller mixer. Blend pigment and mix for 1-2 minutes until no lumps are present. Apply mix to the primed surface using a gauge rake or notched trowel. The above mixture will yield approximately 1.8 gal. of slurry. Coverage is:
| 3/32 inch | 30 sq ft |
| 1/8 inch | 22-23 sq ft |
| 3/16 inch | 15.0 sq ft |
| 1/4 inch | 11.3 sq ft |
The fresh slurry coat must be broadcast to excess with a wearing coarse of aggregate. Rates will vary from 0.25-1.25#/sq ft depending on type and size of aggregate. It is recommended to broadcast 16-30 mesh aggregate. Do not use broadcast aggregate smaller than 30 mesh. Aggregate may be natural or colored quartz, sand, aluminum oxide, emery, etc.
Epoxy.com Product #692 systems must be top coated, protected, or sealed with Epoxy.com Product #693 Methyl Methacrylate (MMA) Top Coating. These can be either pigmented or non-pigmented.
Pot Life and Hardening/Temperature | |||
Temp. (°F) of
|
Hardener by
Vol.(oz.)
|
Pot Life (min.) |
Hardening
|
| +41 | 8.0 Approx. | 25 Approx. | 70 |
| +50 | 7.0 Approx. | 25 Approx. | 65 |
| +68 | 5 Approx. | 20 Approx. | 50 |
| +70 | 5 Approx. | 20 Approx. | 45 |
| Below 41°F Epoxy.com Product # 696 Accelerator must be used in addition to the amount of hardener used at the 41°F level (about ½ oz by vol./gal. @ 32°F up to 2.0 oz by vol./gal. @ -20°F). | |||
PHYSICAL PROPERTIES | |
| Percent Solids | 100% |
| Working Life, 50° - 70° | 20-25 min. |
| Recoat Time | 55-75 Min. |
| Viscosity, cps | 1,100-1,200 cps |
| Weight per Gallon | 8.3 lbs |
| Compressive Strength | 2,500-3,000 psi |
| Tensile Strength | 75-80 psi |
| Elongation at Break | 300% |
Clean tools and equipment with lacquer thinner or MEK. Consult Material Safety Data Sheet for safety and health precautions.
Store 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.
Additives and fillers can separate with storage. Stir thoroughly before using or removing from drum.
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.