Bar’s Leaks® Block Seal Head Gasket Fix is the easiest solution to stop head gasket coolant leaks. No draining of the cooling system is required. One step formulation contains a combination of antifreeze compatible sodium silicate sealing liquid and various size gasket sealing particles which penetrate gaps and cracks then harden to permanently stop leaks.

Key Features:

• Safely Seals Gasket And Other Severe Leaks
• Quickly and Permanently Stops Coolant Leaks
• One Step-No Draining Required-Easy To Use
• Use with ALL types of traditional or extended life coolant