Childers® CP-137 HF Protective Coating

• Meets NFPA Standard 90A & 90B 25/50 requirements.
• Meets the performance requirements of MIL-DTL-3316D, Class 1, Grade A.
• Approved by the U.S. Coast Guard under 164.112/172/0 (SOLAS/IMO approval) superseding 164.012.
• CP-137 HF coating is non-flammable in the wet state and fire resistive when dry.
• It contains no solvents to attack insulations or facings.
• The viscosity permits overhead and vertical applications that do not sag or run for additional ease of application.
• The combination of properties afforded by this material gives it great versatility both as an adhesive and a coating.
• The polymeric resins make this an adhesive of high bond strength.
• The tough film is washable and is abrasion resistant.

• CP-137 HF Protective Coating is used for adhering fabrics such as glass cloth, canvas and brattice cloth to many insulated surfaces such as round and rectangular duct work and equipment.
• It is also used for adhering the laps of these fabrics as well as some woven glass cloths on pipe insulation.
• CP-137 HF is used as a protective coating over all of the above-mentioned fabrics and also finds use as a coating over plastic foam materials such as polystyrene.
• CP-137 HF coating can be brushed on the joints and edges of duct liner insulation to help prevent air erosion of the glass fiber.

Pipe Insulation, Duct Insulation and Equipment

• All insulation finished with canvas (or other fabric finishes) shall be bonded with and have their laps adhered with CP-137 HF coating.
• Apply only to clean, dry, oil-free surfaces. Apply a tack coat at 60 – 70 sq. ft. per gal. (1.5 – 1.7 m2/l).
• Immediately embed the selected lagging fabric into the wet coating.
• Smooth to avoid wrinkles and overlap seams by at least 2 inches (5 cm).
• Immediately apply a finish coat at 60 – 70 sq. ft. per gal. (1.5 – 1.7 m2/l).
• The dry film thickness of this application will vary with the fabric selected. For air conditioning ducts, increase the coverage rate to 40 – 50 sq. ft. per gal. (1.0 – 1.2 m2/l) for each coat.

Notes to Specifying Engineer

1. The above suggested specification is for hot piping and equipment. It may be used for equipment operating below ambient temperatures where it is used as protection over foil faced insulations where the foil facing is taped and sealed and has a perm rating of <0.02 perms.
2. If CP-137 HF is to be top coated with anything other than an alkyd enamel conforming to DOD-E-24607 as specified in MIL-DTL-3316D, the user must confirm by his/her own tests that the products are compatible and that the final results are satisfactory.

Use of Material

• CP-137 HF coating brushes easily despite its somewhat heavy appearance.
• It should be stored indoors and above freezing temperatures, and should not be applied below 40°F (4°C) nor above 100°F (38°C) for best results.
• Stir Well, Do Not Thin.

The Condition of the Surface to Be Adhered or Coated

• Certain surfaces which are dusty or porous such as calcium silicate or certain mineral fiber materials should first be primed with a light coat of CP-137 HF adhesive diluted 50% with water for proper bonding.
• A coating or adhesive will adhere no better than the integrity of the surface to which it is applied. Not suggested for outdoor use.

Application

• CP-137 HF coating is extremely easy to apply by brush and the same procedure would be used as applying latex paints or similar brush-on coatings.
• Brushes or other tools should be kept in water and cleaned with hot, soapy water.
• CP-137 HF coating may be sprayed with many types of equipment, including airless spray.
• Average viscosity range: 70,000 – 90,000 cps.
• For best results, we suggested the following airless spray equipment.

Hints for Success

• CP-137 HF coating is an excellent adhesive and also has good resistance to many chemicals and solvents. Spillage of this material should be cleaned immediately.

¹ - Coverage will vary with nature of substrate, application technique and the fabric selected. 0.040 in. - 0.023 in. wet film thickness (1.0 - 0.6 mm) per coat

² - Applied to ¼” Inorganic Reinforced Cement Board

• Number of Coats: 1
• Rate per Coat (sq. ft./gal.): 40

• California Dept. of Public Health Standard Method v1.2
• VOC Emissions and Content requirements to contribute to LEED v4 EQ Credit: Low Emitting Materials - Paints and Coatings - Classroom
• Collaborative for High Performance Schools EQ 7.1