Bar's Leaks G12BP Powder Radiator Stop Leak - 0.75 oz. Bar leak's, 3/4 oz, stop Leak powder, for your cooling system, install 1 tube for 4 & 6 cylinder cars & light trucks, use 2 tubes for larger vehicles & stubborn leaks Adds Extra shine to your product Manufactured in China Seals leaks Conditions cooling system Inhibits rust and corrosion Lubricates water pump seals Helps control electrolysis