Childers® Chil-Low™ CP-38 AF Fungus Resistant Vapor Retarder Coating

• CHIL-LOW™ CP-38 AF is a water-based, high solids, flexible, vapor retarder coating for use over many types of thermal insulation including polystyrene foam. It can also be used over dry concrete and insulating cement to provide a vapor retarder coating.
• CHIL-LOW™ CP-38 AF has added fungus resistance for use in high humidity areas to resist mold, fungus and mildew growth on its surface and protect the insulation system from their discoloring and deteriorating effects.
• CHIL-LOW™ CP-38 AF is formulated for indoor and light duty, outdoor, commercial use.
• It is UV resistant and has a mild, latex “paint type” odor.
• CP-38 AF is designed for use on pipes, vessels, ducts and equipment operating below ambient temperatures.
• It is non-flammable in the wet state and fire resistive when dry.
• CHIL-LOW™ CP-38 AF is ideal for use over ASJ, FRK and FSK jackets and board facings to give a vapor retarding seal at joints, laps and over staples and weld pin punctures.
• It can also be used as a duct board closure sealant.

Certified

• MAS Certified Green®
• 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
• Collaborative for High Performance Schools EQ 7.1
• Meets the performance requirements for MIL-PRF-19565C, Type II using method ASTM E96, Procedure A permeance

Suggested specifications for vapor sealing insulation on low temperature equipment, chilled water or refrigerated piping and fittings:

• The insulation on all piping, fittings, and equipment shall be vapor sealed with Childers® CP-38 AF CHIL-LOW™ Vapor Retarder Coating.
• The first coat shall be a tack coat applied at a coverage rate of 2 U.S. gals./100 sq. ft. (0.8 l/m2 ).
• While still wet, a layer of CHIL-GLAS® #10 Glass Fiber Reinforcing Mesh shall be embedded, with all seams overlapped a minimum of 2" (5.08 cm).
• A finish coat at a coverage rate of 2 U.S. gals./100 sq. ft. (0.8 l/m2 ) shall be applied so that the total wet film thickness is a minimum of 0.064" (1.6 mm).
• This will provide a minimum dry film thickness of 0.037" (0.9 mm).

Notes to Specifying Engineer 

• Childers® CP-38 AF CHIL-LOWTM Vapor Retarder Coating is white in color and should be specified where white All Service Jacketing (ASJ) or other white coatings/finishings are specified on the adjoining pipe or equipment insulation.
• Do not use over copper clad wire.
• All horizontal surfaces must be sloped at least 1/2 inch per foot (4 cm/m) to assure water run-off and prevent the ponding of rain water and melting snow or ice.

• Always test foil and paper facings for acceptable adhesion before using.
• Outdoor horizontal surfaces must always drain completely. A pitch of at least 1/2 inch per foot (4 cm/m) is required.
• To resist rain wash-off, allow at least 12 hours drying time above 50°F (10°C), with a relative humidity of 50%. Higher humidity and/or lower temperature may retard drying.
• Do not apply over 1/8” (3.2 mm) wet film thickness. Select CP-38 AF in white color for use over polystyrene insulation outdoors. May weather to an off-white color after exposure

Use of Material

• Stir Well.
• Do Not Thin.
• Apply only to clean, dry, oil-free surfaces.
• Keep container closed when not in use.

Application – Indoor and Light Duty Outdoor 

• To prevent water vapor and moisture infiltration, proper and complete flashing is required.
• Follow flashing specifications.
  1. Apply tack coat of CP-38 AF CHIL-LOWTM Vapor Retarder Coating at 2 gallons per 100 sq. ft. (0.8 l/m2 ).
  2. Embed CHIL-GLAS® #10 Membrane into the wet tack coat. Smooth membrane to avoid wrinkles and overlap all seams at least two inches (5 cm). Apply finish coat of CP-38 AF CHIL-LOWTM Coating, within 1/2 hour of the tack coat application, at 2 gallons per 100 square feet (0.8 l/m2 ).
  3. This application shall provide a minimum dry thickness of 37 mils (0.9 mm).
• Brush Use a good brush, suitable for water-based paints, making strokes as long as possible over the surface. Apply with full brush and spread out evenly. Do not overwork.
• Spray CP-38 AF CHIL-LOWTM Vapor Retarder Coating may be airless spray applied. For spray equipment information, please consult Airless Spray Recommendations or contact your spray equipment supplier. Average viscosity range: 60,000 – 90,000 cps. Corrosion resistant pumps and fittings are suggested.
• Clean Up Use fresh water to clean brushes and equipment before product dries. Dry product may be removed with hot soapy water (with ammonia added) or strong solvents such as chlorinated solvent (non-flammable) or xylol (flammable).

• ¹ - Temperature at coated surface.
• ² - Subject to the surface being coated. Wet coverages shown below are for smooth, non-porous surfaces. Porous or rough surfaces will require higher gallonage to attain required dry thickness.
• ³ - Surface: Inorganic reinforced cement board
• ³ - Number of Coats: 1
• ³ - Coverage: 25 sq. ft./gal. in 4” strip
• ⁴ - Tested with reinforcing mesh.

Store and apply between 40°F (4°C) and 100°F (38°C); protect from freezing until dry