Foster® 36-10™ (trowel/glove) Weatherite™ Mastic has excellent brush, trowel, and spray properties, is non-flammable when wet and has a mild odor during application.

Weatherite Mastic forms a tough, fire resistive dry film that is extremely flexible and provides a smooth, attractive finish being suitable for both indoor and outdoor applications. It has excellent adhesion to most foil facings. It can be used on residential low velocity air ducts as a closure joint sealant.