VI-CRYL® CP-11 weather barrier coating is a tough, durable, and fire-resistive water based mastic for most types of thermal insulation and finishing and insulating cements. It is very thixotropic – it looks heavy but spreads easily. It is outdoor rated and U.V. resistant.
VI-CRYL CP-11 weather barrier coating is unsurpassed for the mechanical protection and weatherproofing of thermal insulations both outdoors and indoors, in hot, cold, and dual-temperature service. However, since it is a ‘breathing’ 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 (Fiberglass Pipe’s ASJ paper is a vapor barrier). Childers CP-11 White Mastic has also found use throughout the thermal insulation industry as a coating used over closed cell polyethylene and polyurethane foam insulations.
CP-11 is great for sealing up insulation on chilled water systems. Use Childers CP-11 White Mastic to seal up all exposed fiberglass, paint any tape seams and SSL closures to prevent condensation buildup on the pipes. CP-11 white thermal mastic can be painted on with a brush.
$37.95 for a 1 Gal pail
$73.25 for a 2 Gal pail