If you’re looking for a safe and fast car radiator sealant then the ATP AT-205 Re-Seal product could be the right choice. This product is professional strength, so you know you’re getting some serious top-notch stuff when you invest in a bottle. Not only does it stop leaks fast, but it also brings all your rubber seals & gaskets in the engine, transmission, power steering and hydraulic systems back to life with its rejuvenating formula. You won’t have to worry about flushing out the system either, as this radiator sealant is compatible with conventional and synthetic oils, power steering fluids, hydraulic oil, ATF and gear oil. Although the sealant is strong enough to totally restore worn-out or dry seals it won’t harm the internal components.
This is an easy-to-use product. All you need to do is to add the liquid into your car as you would normally with oil or brake fluid. The specially-formulated liquid is designed to blend with the oil and circulate when you vehicle is being operated. The fluid is made from a plasticizer that essentially works by hardening and increasing flexibility. It gets to work in as little as five hours unless the seal or gasket is severely damaged.