T-Rex Black Bed Liner, 2K Urethane, SMR-1000-K8 Truck Bedliner w/Free Spray Gun Easy to use: ADD hardener - SHAKE - SPRAY (see instructions below) Abrasion and Stain Resistant Protects against rust, corrosion salt, damp & extreme temperatures Waterproof, flexible, helps deaden sound & vibrations Provides excellent adhesion