Permatex 30300 Head Gasket Repair Multi-Purpose Stop-Leak 16 oz

Permatex Head Gasket Repair is a professional-grade liquid sealant designed to repair and seal head gasket leaks, warped or cracked heads, and damaged engine blocks. This concentrated formula creates a permanent seal that withstands extreme temperatures and pressures within the engine's cooling system.

Key Features:

• Repairs blown head gaskets, warped or cracked cylinder heads, and freeze plug leaks
• Seals engine blocks and pinhole leaks in the cooling system
• Works with all types of antifreeze and coolant, including extended life formulas
• Safe for all engines including gasoline, diesel, and aluminum engines
• Non-clogging formula won't harm cooling system components
• Easy pour-in application requires no disassembly
• 16 fluid ounce bottle treats cooling systems up to 4 gallons

This stop-leak formula chemically bonds to seal cracks and leaks while preventing future failures. Simply add to the radiator or coolant reservoir, run the engine, and the product circulates through the cooling system to seal leaks from the inside. Ideal for emergency repairs or extending the life of aging engines.