Karnak 502 RC-W Elasto Kote Finish Coat
502 RC-W ELASTO KOTE FINISH COAT
502 RC-W ELASTO KOTE (FINISH COAT)
502 RC-W Elasto-Kote Finish Coat is a highly elastic, reflective thermoplastic rubber, single component, coating to be applied as a finish coat over 502 RC-W Elasto-Kote Base Coat.
INFORMATION
BRAND
Karnak
PRODUCT TYPE
Finish Coats
THERMAL EMITTANCE
Initial 0.40 (3 year 0.45)
WATER ABSORPTION
(7 days) 0.4%
AVAILABLE SIZES
- 1 gallon Cans
- 5 gallons Pails
- 55 gallon Drums
SRI
107 Initial 89 3-Yr. Aged
ELONGATION
715%, Nominal ASTM D 237
SOLIDS BY WEIGHT
55%, Nominal
HARDNESS, SHORE A
65
APPLICATION TEMP
40°F to 120°F
VOC CONTENT
<550 g/L MAX
COLORS
White, Gray, Patina Green and Forest Green are standard colors. Other colors are available in minimum quantities of 300 gallons. See "Elastomeric Coating Color Chart" for other available colors.
ROLLER / BRUSH APPLICATION
Apply with a 3/4" – 1-1/4” nap roller or soft roof brush
PERMEABILITY
0.01 Perm
WEIGHT PER GALLON
9.82 lbs.
CURE TIME
12 to 24 hours@ 77°F and 50% Relative Humidity
ASTM D 6083 TYPE ICRRC
(Except Solvent Based)
SOLAR REFLECTANCE
0.85 Initial 0.72 3-Yr. Age
CATEGORIES
- Finish Coats
- Base Coats
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.
ADVANTAGES
- Highly elastic, SEBS thermoplastic rubber roof coating
- Low permeability provides excellent water blister resistance
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.
DOWNLOAD
↓ Data Sheet
SOLIDS BY VOLUME
40%, Nominal
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.
CAUTION / CARE OF TOOLS
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.”
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.
