83 Fibered Dampproofing (Brush or Spray)

    83 Fibered Dampproofing (Brush or Spray)

    Available in: 5 gallon pails & 55 gallon drums

    KARNAK 83 Fibered Dampproofing is a solvent based asphalt compound, manufactured with selected asphalts, mineral fibers, stabilizers and mineral spirits. KARNAK 83 Fibered Dampproofing is prepared to semi-mastic consistency for easy application, by brush, spray or roller. This material is a multi-  purpose, cold applied protective dampproofing that dries to a tough, durable and flexible coating that gives excellent performance over a wide range of  temperature and conditions. This product exhibits excellent resistance to acids and alkalies in the soils and in the environment.





    Acids Excellent
    Alkaline Excellent
    Salts Excellently – no mixing required

    VOC: 273 g/L


    • ASTM D-4479 Type I
    • SSA-694d

    Coverage Calculator

    • 4-4 Gallons per 100sf**


    This is intended as a general guideline only, coverage can vary based on many factors.


    KARNAK 83 Fibered Dampproofing is designed to dampproof masonry and concrete exterior surfaces below grade and interior surfaces above grade. This product is also suitable as a general protective coating for wood, steel and for all backup materials for masonry such as stone, brick and concrete.

    Physical Properties

    Weight per Gallon: 8.4 lbs.
    Solids by Weight: 72%
    Solids by Volume: 65%
    Color: Black
    Permeability: .25 perms
    Cure Time: 24 to 48 hours @ 77°F @ 50% Relative Humidity
    Application: Brush or Spray
    Service Temperature Range: 15°F to 150°F

    Preparation & Application

    Surfaces must be clean, dry and free from oil, grease, release agents, laitance, dirt, dust and debris. All cracks and pin holes should be repaired and filled with KARNAK 86 Trowel Mastic prior to coating. If the surface is very porous, it is recommended that KARNAK 108 Asphalt Primer be utilized to provide a firm film base prior to coating with KARNAK 83 Fibered Dampproofing.

    Apply with a wide, fiber brush at the rate of 4 gallons per 100 sq. ft.

    Utilize a standard heavy duty airless spray pump using heavy duty guns and nozzles. Equipment manufacturers should be consulted for more complete information. Apply at the rate of 4 gallons per 100 sq. ft.

    Apply at the rate of 4 gallons per 100 square feet.

    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. Backfilling should take place within 7 days in areas where hydrostatic  pressure is known to occur. Contact KARNAK Corporation for alternate product suggestions.

    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. Cover air intakes during application and while drying.

    Tools and other equipment should be thoroughly cleaned with mineral spirits, taking necessary precautions when handling combustible materials.

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