HomeProductsClear & HardenersCHALLENGER CL640 – PRODUCTS CATEGORIES BODY FILLERS PRIMERS AUTO REFINISH CLEARS & HARDENERS CAR CARE PRODUCTS TOOLS CHALLENGER CL640 Challenger hardener for Challenger basecoat, used to make a better adhesion between basecoat and clear coat CL 640 INSTOCK RELATED PRODUCTS READ MORE READ MORE READ MORE