CHEMICAL RESISTANCE:
Acids: Excellent
Alkaline: Excellent
Salts: Excellent

ASTM D-4479 Type I‍

Fed. Spec. SS-A-649d

Complies with Chapter 13 of Massachusetts Energy Code

VOC Content: 300 g/L MAX

88R Rubberized Waterproofing is designed to waterproof masonry and concrete exterior surfaces below grade and interior cavity wall surfaces above grade. 88R Rubberized Waterproofing also functions as a vapor barrier and air barrier. This product is also suitable as a general protective coating for wood, spray polyurethane foam, steel and for all backup materials for masonry such as stone, brick and concrete.

Weight per Gallon: 8.42 lbs.
Solids by Weight: 69% Nominal
Solids by Volume: 61% Nominal
Elongation: 575% ASTM D412
Tensile Strength: 150 psi ASTM D412
Color: Black
Permeability: 0.026 perm ASTM E96
Air Leakage: 0.001 L/(s●m2) @pressure difference of 75 Pa ASTM E293
Application Temp.: 40°F to 120°F
Service Temp(Cured Film): -40°F to 160°F
Cure Time: 24 to 48 hrs. @ 77°F and 50% Relative Humidity

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SURFACE PREPARATION:
Surfaces must be clean, dry and free from oil, grease, release agents, laitance, dirt, dust and debris. All cracks and imperfections should be repaired and filled with 229AR-Elastomeric Trowel Grade prior to coating. If a primer is necessary, KARNAK recommends that 108 Asphalt Primer be utilized to provide a firm film base prior to coating with 88R Rubberized Waterproofing. Recommended application temperature is 40°F to 120°F. If applying at temperatures lower than 40°F, the substrate must be free of moisture and/or ice crystals

APPLICATION:
Apply by standard heavy-duty airless spray equipment. Equipment manufacturers should be consulted for more complete information. Spray tip should be 0.035 to 0.041 mm. Apply at the rate of 4 gallons per 100 sq. ft. Material may also be applied by masonry brush. NOTE: Allow the film to cure for at least 24 to 48 hours prior to backfilling. Care should be taken during filling not to puncture or damage the coating. A protection board is highly recommended to protect the film prior to backfilling. Contact KARNAK Corporation for alternate product suggestions.

NOTE: Allow the film to cure for at least 24 to 48 hours prior to backfilling. Care should be taken during filling not to puncture or damage the coating. A protection board is highly recommended to protect the film prior to backfilling. Contact KARNAK Corporation for alternate product suggestions.

COVERAGE:
Apply at the rate of 4 gallons per 100 sq. ft. (64 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 and other equipment should be thoroughly cleaned with Karna-Klean or mineral spirits, taking necessary precautions when handling combustible materials.