RADIATOR LEAK-STOP is a product to eliminate leakages in cooling systems. It restores the lost elasticity and flexibility of seals. It seals leaks of gaskets, washers, radiators, and small cracks in the cylinder head. It preserves water pump and heating system performance. It is neutral to metals, aluminum, water hoses and plastic. It protects from corrosion. It can be used with all types of anti-freezes and water.