CRC K&W 401016 Block Seal Permanent Metallicâ„¢ Block & Radiator Seal - 16 Oz
Permanent molecular seal that’s as strong as steel.
Seals cracks & holes in cast iron and aluminum engine blocks, head gaskets, freeze plugs, and copper, aluminum and bi-material radiators & heater cores.
For use in all water-cooled diesel and gasoline vehicles.
Withstands extreme pressure and temperatures of a cooling system and will not wash away.
Professional grade formula exceeds ASTM D6107 for effectively sealing leaks in cooling systems.
Small leaks blow porous joints or cracks in the cooling system are not easy to locate (that is noticed is the cool falling water levels). Radiator Leak seals such leaks immediately and completely..
For all cooling and heating systems with water and without water filter. Also suitable for aluminum and plastic radiators. Compatible with all standard cooling stabilizers and frost protection agent. Also suitable for preventative use..