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Free Shipping on orders over $49Vapor-Safe white duct closure mastic is a fire resistive, fibrated, water-based, vapor retardant sealant for indoor or outdoor low, medium and high velocity heating and air conditioning ducts. It performs as a tough and flexible adhesive and sealant, forming a durable seal against air leakage when used with reinforcing membrane. Mechanical fasteners of the type and number normally used for duct assemblies are required to provide rigidity to the duct system.
Duct Closure Mastic, Foster®, Vapor-Safe®, Bright White, 2 gal, Temperature Rating: Storage/Apply: 40 to 100 Deg F, Service: 20 to 200 Deg F, Specific Gravity 1.39, VOC 27 g/L, Mild Sweet Odor, Chemical Composition: 10 to 30% Calcium Carbonate, 10 to 30% Aluminum Hydroxide, 5 to 10% Chlorinated Paraffin, C14-C17, 1 to 5% Titanium Dioxide, 1 to 5% Cellulose, 0.1 to 1% Diatomaceous Earth, 0.1 to 1% Crystalline Silica, Liquid Form, Standards: UL 181 A-M/B-M, For Use With: For Indoor Or Outdoor Low, Medium And High Velocity Heating And Air Conditioning Ducts
