Bar's Leaks 1109 Liquid Copper Block Seal Intake and Radiator Stop Leak 18 oz

Bar's Leaks Liquid Copper Block Seal seals larger leaks regular stop leaks won't. This one-step formula permanently repairs coolant loss problems on cars, trucks, vans, SUVs and RVs.

Key Features:

• Antifreeze compatible sodium silicate liquid glass penetrates large and small leaks in plastic, aluminum and cast iron heads, blocks, intake manifold & gaskets, freeze plugs, heater cores and radiators
• Fiber additives lock together with liquid to increase strength and promote a permanent seal
• Will not harm the cooling system when used properly, no draining is required
• Use with all types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water
• One-step application - pour directly into radiator for easy use

This professional-grade coolant leak repair solution is designed to provide permanent sealing of cooling system leaks without the need for draining or flushing. 18 oz bottle, weight 2.43 lbs.