83AF Fibered Dampproofing

Karnak #83AF Fibered Dampproofing is a solvent based asphalt compound, manufactured with selected asphalts, mineral fibers, stabilizers and mineral spirits. Karnak #83AF 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.


Karnak #83AF 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.


  • ASTM D-4479 Type I
  • SSA-694d


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 #86AF 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 #83AF Fibered Dampproofing.


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

SPRAY APPLICATION: 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.

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.


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


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


  • Weight per Gallon: 8.4 lbs.
  • Solids by Weight: 72%
  • Solids by Volume: 65%
  • Color: Black
  • Permeability: 0.003
  • Cure Time: 24 to 48 hours @ 77° @ 50% Relative Humidity
  • Application: Brush or Spray
  • Service Temperature Range: 40° to 150°F


  • Acids: Excellent
  • Alkaline: Excellent
  • Salts: Excellent


Do not apply when rain is imminent. Protect from freezing. Coating must be dried before exposure to water. Store in a heated room and keep container covered when not in use. Do not thin. Keep out of reach of children. Avoid prolonged contact with skin. Dispose of in an environmentally safe manner.


Available in 5 gallon pails and 55 gallon drums.

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Kanopy Reflective Roof Maintenance Solutions
  • Reduce Energy Use
  • Lowers Peak Energy Use, reducing energy costs year-round
  • Helps the environment, reduces "Heat Island Effect"
  • Extend the life of the roof
  • Reduces waste. Helps avoid roof tear-off.
  • Economic compared to roof replacement
  • Eliminates interior building operation disruption