DINITROL 4941 is a black solvent based underbody coating which resists corrosion and abrasion. The underbody coating product is widely used in the treatment of vehicles during production, at import plants and in aftermarket applications. When applied to a clean, dry surface, it adheres to both painted surfaces and those coated with a layer of PVC or similar material. Zinc, rubber and plastics are completely unharmed by the product. DINITROL 4941 / Car is also designed for use on spare parts, machines and iron and steel structures in highly corrosive environments. Apply over Dinitrol HS 3125 for the ultimate in rust prevention. To apply this product use Wax / Shutz Gun . Available in Aerosol (500ml) or 1 litre .