KARNAK 229AR-Elastomeric is a single component, SBS rubber reinforced asphalt which forms a highly elastomeric roof coating barrier. 229AR has excellent elongation properties, good cold weather pliability and excellent water and weather resistance.
Weight Per Gallon: 8.6 lbs.
Hardness, Shore A: 55 ASTM D-2240
Elongation: 350% ASTM D-412
Tensile Strength, PSI: 400 ASTM D-412
Water Vapor Permeance: 0.017 perm ASTM E-96
Air Permeability (Leakage): 0.000 L/(s·m2) @ pressure difference of 75 Pa
Service Temp. Range: -40ºF to 160ºF
Solids: Trowel 70%, Brush 63%, Spray 60% ASTM D-2697
VOC Content: 21 g/L
Preparation & Application
Surfaces must be clean, dry and free from oil, grease, release agents, laitance, dirt, dust and debris. All cracks and holes should be filled with 229AR Elastomeric Trowel Grade prior to surface coating.
KARNAK 229AR Elastomeric Brush Grade should be mechanically mixed thoroughly, prior to application. For vertical applications use only 229AR Elastomeric Trowel Grade.
Trowel Grade – Apply to either vertical or horizontal surfaces using a smooth edge trowel. Coverage will vary depending on the desired thickness. To achieve a 1/16” thickness apply at the rate of 4 gallons per 100 sq. ft.; 1/8” thickness apply at the rate of 8 gallons per 100 sq. ft.; ¼” thickness apply in two coats at the rate of 8 gallons per 100 sq. ft. per coat.
Brush Grade – Mix thoroughly just prior to using. Apply to horizontal roof surfaces with a fiber roof brush at the rate of 3 to 4 gallons per 100 sq. ft. Coverage will vary depending on the irregularity and porosity of the roof surface.
Caulk Grade – Apply directly in and over cracks using a standard caulking gun. An application rate of ¼” x ¼” bead of caulk will yield approximately 75 linear feet per 30 oz. caulking cartridge. Coverage may vary depending on desired thickness and surface being caulked.
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. Keep container covered when not in use. Do not thin. Dispose of in an environmentally safe manner.
CARE OF TOOLS:
Tools and other equipment should be thoroughly cleaned with 709 Karna-Klean. Mineral spirits or similar solvent may also be used, taking necessary precautions when handling combustible material.
Recognized by professional roofing contractors as the best quality product in the market.