Highly elastic, SEBS thermoplastic rubber roof coating

Low permeability provides excellent water blister resistance

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ASTM D 6083 Type I: (Except Solvent Based)
Solar Reflectance: 0.85 Initial 0.72 3-Yr. Aged
Thermal Emittance: 0.89 Initial 0.92 3-Yr. Aged
SRI: 107 Initial 89 3-Yr. Aged

502 RC-W Elasto-Kote Finish Coat is intended for use over 502 RC-W Elasto-Kote Base Coat over metal roofs, spray polyurethane foam roofs, EPDM, TPO, and most PVC roof membranes. Also, good over previously coated surfaces as well as for coating concrete, concrete block, brick, cinder block, stucco and wood. May be applied over 405 Bond-N-Shield Base Coat over smooth BUR and smooth or granule modified bitumen membrane roofs. PVC and TPO roofs should be at least 4 years old before coating.

Weight per Gallon: 9.82 lbs.
Solids by Weight: 55%, Nominal
Solids by Volume: 40%, Nominal
Hardness, Shore A: 65
Elongation: 715%, Nominal ASTM D 2370
Tensile Strength: 1,182 PSI, Nominal ASTM D2370
Permeability: 0.01 Perm
Water Absorption (7 days): 0.4%
Cure Time: 12 to 24 hours@ 77°F and 50% Relative Humidity
Application Temp.: 40°F to 120°F

VOC Content: <550 g/L MAX

SURFACE PREPARATION:
All roof surfaces to be coated should be clean and free of dirt, dust flaking and pitting rust, grease, oil, and loose paint. Surfaces should have been previously coated with 502 RC-W Elasto-Kote Base Coat or 405 Bond-N-Shield Base Coat (Asphalt only). Recommended application temperature is 40°F to 120°F. Contact KARNAK Technical Services at 800-526-4236 for questions regarding surface preparation.

APPLICATION:
Mix lightly prior to application of the coating. 502 RC-W Elasto-Kote Finish Coat may be applied by brush, airless spray equipment or roller or previously applied 502 RC-W Elasto-Kote Base Coat. For applications in higher temperatures (above 90 °F) KARNAK recommends application in multiple thin coats to prevent trapped moisture problems. Allow to dry 24 hours before exposure to rain or water. Coverage rate will vary due to texture and porosity of the surface. 502 RC-W Elasto-Kote Finish Coat will take approximately 4-6 hours to dry to the touch. EPDM roofs should first be coated with 502 RC-W Elasto-Kote Base Coat at the rate of 0.5 gallons per 100 sq. ft. followed by two coats of 502 RC-W Elasto Kote Finish Coat at 1-1.5 gallons per 100 sq. ft. per coat. Asphalt roofs should first be coated with 405 Bond-N-Shield Base Coat at the rate of 1.5 gallons (smooth) or 2 gallons (granule) per 100 sq. ft. followed by two coats of 502 RC-W Elasto-Kote Finish Coat at 1.25 gallons per 100 sq. ft. per coat. Commencement of work by the contractor implies his approval of the deck surface.

ROLLER / BRUSH APPLICATION:
‍Apply with a 3/4" – 1-1/4” nap roller or soft roof brush.

SPRAY APPLICATION:
Utilize an airless spray pump. Equipment manufacturer should be consulted for more complete information. Spray application should be done with a 30% over-spray pattern.

COVERAGE RATE:
Apply 502 RC-W Elasto-Kote Finish Coat at the rate of 1.5 gallons per 100 sq. ft. (24wet mils) over previously applied base coat.

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ARCHITECTURAL COLORS:
‍‍Standard colors: White and portland gray.
Specialty colors: Patina green, forest green, terra cotta red, red, cement gray and khaki tan. All require minimum order of 350 gallons.

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Do not use near open flame. Avoid breathing solvent fumes and prolonged contact with skin. Do not take internally. If swallowed, do not induce vomiting. Call a physician immediately. Keep out of reach of children. Coating must be dried before exposure to water. Store in a heated room and keep container covered when not in use. Do not thin. Dispose of in an environmentally safe manner. Cover air intakes during application and while drying. For exterior use only.

Cold-process systems and coatings, either emulsion or solvent-based, should only be installed on decks with positive drainage. Per NRCA (National Roofing Contractors Association), “The criteria for judging proper slope for drainage is that there be no evidence of standing water on a deck 48 hours after it stops raining.”

CARE OF TOOLS:
Tools may be cleaned with xylol, mineral spirits, lacquer solvents or Karna-Klean. Take necessary safety precautions when handling flammable materials.