Radiator Stop Leak — Block Seal Liquid 32 oz

Seal small radiator and heater core leaks quickly without draining the cooling system with this concentrated liquid stop leak. The sodium silicate-free formula seals leaks without clogging passages, is compatible with all coolant types, and treats the entire cooling system.

• 32 oz treats entire cooling system
• Sodium silicate free — safe for passages
• Compatible with all coolant types
• Seals radiator and heater core leaks
• No coolant drain required