IFI: The Leader in Pipe Insulation Fabrication and Distribution

Childers AK-CRYL CP-9 from an IFI Partner

Contact IFI for Mineral Wool and Vinyl Pipe and Support Insulation Products

Childers: AK-CRYL™ CP-9

AK-CRYL® CP-9 is a 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.


AK-CRYL CP-9 Weather Barrier Coating provides weatherproofing and mechanical protection of thermal insulation both outdoors and indoors, in hot, cold and dual-temperature service. Because it is a ‘breather’ coating (vapors under pressure will pass through it), it should only be used over insulations in low temperature, or dual-temperature service when the insulations themselves are vapor barriers, or where a complete vapor barrier system is applied to the insulated surface either before or after the coating is applied. Industry experience has demonstrated that all weather barrier coatings may blister when applied over polystyrene board. This effect may be limited by the use of white colored coatings.


  • In the wet state, AK-CRYL CP-9 Weather Barrier Coating is nonflammable for worker safety
  • Being water based, it contains no harmful solvents that will attack insulations or facings
  • Its special formulation allows for application during most times of the year for increased productivity


  • Meets NFPA Standard 90-A and 90-B 25/50 requirements
  • This product has been testing according to ASTM E-84 (Surface Burning Characteristics of Building Materials)
  • Meets requirements for LEED IEQ 4.2 Low-Emitting Materials, Paints and Coatings. VOC: 45 g/l, less water and exempt solvents

Contact IFI for all of our Childers by Foster products

Download the Childers CP-09 Data Sheet  Download the Childers CP-09 MSDS


Key Partners