The Steel Seal 16 oz Head Gasket Sealer is a permanent fix solution for 4 cylinder engines. It is designed for easy pour-in DIY repair and has a 99% proven success rate. This product is suitable for all 4 cylinder engines and is ideal for repairing blown head gaskets, cracked heads, heater cores, and freeze plugs. Made in the United States, this gasket sealer comes in a pack of 1 and is a reliable choice for fixing engine leaks and leaks effectively.