Cool Roof Rating Council (CRRC)
Solar Reflectance: Initial 0.85 3 year 0.72
Thermal Emittance: Initial 0.89 3 year 0.92
SRI: Initial 107 3 year 89

Service Temp (Cured Film): -15°F to 180°F
ASTM D 6083 Type I: (Except Solvent Based)

VOC Content: <550 g/L MAX

502 RC-W Elasto-Kote Base Coat is intended for use on metal roofs (includes a rust inhibitor), 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. Maybe 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
Color: Gray
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

SURFACE PREPARATION:
Mix lightly prior to application of the coating. 502 RC-W Elasto-Kote Base Coat may be applied by brush, airless spray equipment or roller. For applications in higher temperatures (above 90 °F) KARNAK recommends application in multiple thin coats to prevent trapped moisture problems. 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 Base Coat at the rate of 1.5 gallons per 100 sq. ft. (24 wet mils). Allow base to dry 24 hours before applying 502 RC-W Elasto-Kote Finish Coat. Coverage rate will vary due to texture and porosity of the surface. Film thickness should be approximately 18-20 dry mils. 502 RC-W Elasto-Kote Base Coat will take approximately 4-6 hours to dry to the touch. EPDM roofs should first be coated at the rate of 0.5 gallons per 100 sq. ft. (8 wet mils) followed by two coats of 502 RC-W Elasto-Kote Finish Coat at 1.25-1.5 gallons per 100 sq. ft. per coat (20-24 wet mils).

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. 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.

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