Black mastic is a high-performance moisture-proof and vapor barrier material formulated with asphalt as the base material, enhanced with mineral fillers and flame retardant additives. Also known as waterproof flame retardant mastic, this product offers exceptional performance characteristics including:
Superior air tightness and water resistance
Excellent frost and corrosion resistance
Durable resistance to aging and cracking
Flame retardant properties when dried at room temperature
