K-Seal Ultimate Head Gasket Repair - 16 oz

K-Seal pour and go head gasket repair. Permanently seals head gaskets but also seals cracked heads and porous blocks. Simple to use. Just shake bottle, pour, and go. Anti-rust protection. Goot to -38 Deg F. Works in minutes. Tested to ASTM-D-3147. Compatible with all brand of coolant. No draining or flushing needed. Add to hot or cold engine. Add to overflow tank.