CP-9 Ak-Cryl® Coating | GLT Products

CP-9 Ak-Cryl® Coating


CP-9 Ak-Cryl® Coating is an economical, polymeric, water based weather barrier, breather type mastic. CP-9 dries to a tough flexible film that protects thermal insulation from the ravages of weather by preventing water, rain, snow, sleet, spillage, wash water, etc., from entering into the system. In addition, CP-9 provides protection from mechanical damage created by external forces such as impact abrasion as well as the internal forces of thermal expansion, contraction, or vibration. Using CP-9 can also protect the insulation from chemical attack of acids, alkalis and solvents. CP-9 is fire resistant and U.V. stable.


  • Colors: White Other colors available on special order 
  • Wet Weight: 11.4 lbs./U.S. gal. (1.37 kg/liter) 
  • Average Non-Volatile: 60% to 64% by volume (64% by weight) 
  • Service Temperature Range: -40°F to 180°F (-40°C to 83°C) 
  • Application Temperature Range: 40°F to 100°F (4°C to 38°C) 
  • Drying Time: Touch - 2-4 hours; Through - 24-36 hours (Drying time will vary depending upon film thickness, temperature and humidity)
  • Coverage: 6 U.S. gal./100 sq. ft. (2.4 l/sq.m) (Varies with substrate and membrane.) 
  • Clean-up: Warm, soapy water (wet), xylol (dry) 
  • Water Vapor Permeance: ASTM E-96 Greater than 1.0 perms (Procedure B) at 1/16" film thickness.

Other notable features:

  • Typical Use: Commercial
  • Vapor Sealing Insulation Facing and Jacketing: Good
  • Fiberglass and Mineral Wool: Better
  • Rigid Insulation: Better
  • Polystyrene Coating: Better
  • Calcium Silicate: Better
  • Volatile Component: Water
  • Perm Rating: Greater than 1.0 Perm for 1/16" Dry Film (Breather)


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