MMA Clear Topcoating

Methyl Methacrylate - Fast Setting

Sets in About 1 Hour

Description

Product #689 MMA SEALER is a 100% reactive medium viscosity methyl methacrylate resin developed as a sealer/top-coat over various Epoxy.com MMA Systems. Product #689 is a chemical resistant coating specifically designed for food and beverage plants, commercial kitchens, dairies, and areas having constantly wet surfaces with food and fat contamination.

Product #689is suitable for use in numerous other applications, both indoors and outdoors.

ADVANTAGES

• Medium viscosity
• Fast cure for rapid recoat and return to service
• UV resistance; non-chalking
• Abrasion and wear resistance
• Meets USGBC LEED criteria for low VOC
• Chemical resistance; Increased Hot Water and Fatty Acid Resistance
• Meets USDA requirements
• Use over wide temperature range; even below freezing

COMPOSITION

100% reactive methyl methacrylate resin.

CONSIDERATIONS

• Concrete must be dry, free of dirt, waxes, curing agents and other foreign materials
• Maintain coating thickness at 10-20 mils per coat to minimize ambering and possible micro cracking
• On or below grade installation must have an efficient vapor barrier under the slab (minimum 10-15 mil)
• Moisture vapor transmission must be less than 3 lbs per ASTM F1869 and less than 80% RH per ASTM F2170 unless Key Resin moisture mitigation system is used
• Do not use as final topcoat for areas prone to heavy scuffing and tire markin
• MMA odor must be contained and/or ventilated with negative air flow as necessary
• Small enclosed spaces require proper negative air flow ventilation to ensure proper curing

COLOR SELECTION

Product #689 MMA SEALER is supplied Clear (slight haze). Color packs are available, refer to Key Epoxy.com MMA Color Card. Color pack mix ratio is 1 quart pigment per 5 gallons resin. Certain light colors may require 2 quarts per 5 gallons.

COMPOSITION

100% reactive methyl methacrylate resin.

COVERAGE

Product #689 MMA Sealer is typically spread at 80-160 ft2 /gallon to yield 10-20 mils. Do not apply >20 mils per coat to minimize ambering and avoid possible micro cracks

APPLICATION

SURFACE PREPARATION

Surface Preparation is the most critical portion of any successful resinous flooring system application. All substrates must be properly prepared as outlined in Epoxy.com Surface Preparation Procedures.

All Epoxy.com MMA Flooring Systems require a minimum surface profile of CSP 4-5.

Product #689 MMA SEALER requires the addition of Epoxy.com #695 MMA HARDENER 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 MMA COLD TEMPERATURE ACCELERATOR must be used in addition to the amount of hardener used at the 40°F or 30°F level.

Mix Ratios, Working Life, Hardening/Temperature

ADDITIVES / SPECIAL CONDITIONS

Epoxy.com MMA COLD TEMPERATURE ACCELERATOR: At temperatures below 40°F, Epoxy.com MMA Cold Temperature Accelerator must be used in addition to the amount of hardener used at the 40°F or 30°F level. As a rule of thumb, add about 1/2 oz by volume per gallon of resin at 39° to 32°F, up to 2.0 oz by volume per gallon at -20°F, increasing the quantity gradually in a consistent linear progression as the temperature decreases.

Very Important:

Product #689 MMA COLD TEMPERATURE ACCELERATOR MUST be added to the MMA resin and thoroughly blended BEFORE adding the Epoxy.com Product #695 MMA HARDENER, or hazardous decomposition may occur (i.e., violent foaming). Epoxy.com MMA COLD TEMPERATURE ACCELERATOR will cause yellowing, it is advised to use pigmented MMA resin versus clear to reduce the appearance of yellowing, darker colors will be less affected than lighter colors. Coating work should be continued only after the complete hardening of the previous layer. Tap random areas with a hard edge tool to confirm resin is hard and not "surface dry".

MIXING / INSTALLATION

Add hardener to the clear resin and blend, after 30 seconds add pigment and continue blending for 1-2 minutes. Apply mix to the hardened MMA primer/body coat pouring a ribbon and spreading material with a notched/flat squeegee or trowel to the desired thickness, followed immediately with rolling using a short/medium nap roller. Roll in one direction, then roll in a 90° pattern. This will reduce the occurrence of roller marks in the top coat. Coating thickness should be a minimum of 10 mils and maximum of 20 mils (80-160/ft2 gal.) over a smooth primer/basecoat, or maximum of 25-30 mils when used as a grout coat over a textured broadcast system, depending on the profile of the base material. 100 SF /gallon is average over a smooth basecoat. If the coating exceeds 20 mils over a smooth basecoat, the top coat may remain visibly blue or yellow.

IMPORTANT

Back-rolling should be performed immediately after spreading, and should be completed before reaching the upper limit of the pot life time, as the resin quickly transitions from fluid to sticky within a few minutes. Very light surface rolling may still be performed towards the end of the working time, but do not allow full weight of the roller to completely imbed in the resin and contact the bond line or problems may result (resin may become "stringy" and pull away from the previous layer). Also, be aware that addition of the pigment to the clear resin may slightly speed up the cure process. Use a clean roller cover with each successive batch

HELPFUL HINTS

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 unless prepared for very short working time, possible roller marks, aesthetic variations in finish, etc.

TECHNICAL DATA

PHYSICAL PROPERTIES

CLEAN UP

Clean tools and equipment with Epoxy.com MMA MONOMER, lacquer thinner or MEK. Consult material Safety Data Sheet (SDS) for safety and health precautions.

MAINTENANCE

Epoxy.com Product #689 MMA is considered to be a low maintenance flooring solution. After completing the application of Epoxy.com Product #689 MMA, the installer should provide the owner with maintenance instructions. #695 MMA is easily cleaned with neutral soaps or detergents. Contact Epoxy.com Technical support for additional recommendations. Certain textures and environments require specific cleaning with bristled brushes. Due to the thermoplastic character of MMA resins, black marks can occur from fork lifts and tires skidding

AVAILABILITY

Contact Epoxy.com Customer Service at 321-206-1833

TECHNICAL SUPPORT

Epoxy.com provides services and consultations on material selection, specification, troubleshooting, and other information on the proper repair and protection of concrete surfaces.

STORAGE

Store Product #689 in a cool and dry place, below 80°F, out of direct sunlight. Do not store near open flame or food. Shelf life is 12 months in the original unopened containers. After extended storage: Additives and fillers can separate with storage, materials should be inspected for any visible signs of settlement, polymerization, or paraffin coagulation (clumps, strands). Thoroughly mix pails or drums (use a drum mixer, do not rely on rolling drum on floor) and pour into new containers to inspect resin before use.

MMA Warranty

Epoxy Systems, Inc. AKA Epoxy.com warrants for a period of one (1) year that its products will be free of manufacturing defects and will be in conformity with published specifications when handled, stored, mixed, and applied in accordance with recommendations of Epoxy.com. If any product fails to meet this warranty, the liability of Epoxy.com will be limited to replacement of any non-conforming material if notice of such non-conformity is given to Epoxy.com within (1) one year of delivery of materials. Epoxy.com may in its discretion refund the price received by Epoxy.com in lieu of replacing the material. No customer, distributor, or representative of Epoxy.com is authorized to change or modify the published specifications of this warranty in any way. No one is authorized to make oral warranties on behalf of Epoxy.com. In order to obtain replacement or refund the customer must provide written notice containing full details of the non-conformity. Epoxy.com reserves the right to inspect the non-conforming material prior to replacement. EXCEPT FOR THE EXPRESSED WARRANTY STATED ABOVE, THERE ARE NO OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR PURPOSE. EPOXY.COM'S OBLIGATION SHALL NOT EXTEND BEYOND THE OBLIGATIONS EXPRESSLY UNDERTAKEN ABOVE AND EPOXY.COM SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO THE PURCHASER OR ANY THIRD PARTY FOR ANY LOSS, COST, EXPENSE, DAMAGE OR LIABILITY, WHETHER DIRECT OR INDIRECT, OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.

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If it does not have this logo on it, it is not an Epoxy.com product.

Proper mixing and installation are critical to the success of all products. See Installation Tips, Techdata, and (M)SDS for more details, or contact us with any questions.

321-206-1833 Customer Service – Ordering and Order Status
Katey Lambert-Fontaine – Vice President & Chief Operations Officer
[email protected]

352-533-2167 Technical Support
Norm Lambert – President & Technical Support Director
[email protected]

Debby Lambert, Co-Founder and Strategic Planning

Website: www.epoxy.com

24-hour Hazmat Emergency Telephone Response Service: 1-800-633-8253

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