Cooling sealant formulated for winter use

Updated Dec 7, 2011

Bar’s Leaks Professional Carbon Fiber Block Seal Head Gasket & Cooling Sealant for winter use is formulated to seal coolant leaks in radiators, heater cores, freeze plugs, gaskets, intake manifolds, cylinder heads and engine blocks. The cooling sealant is antifreeze-compatible, so there’s no need to flush the cooling system before using it, and it doesn’t need to be removed at the end of a repair, which means the sealant stays in the vehicle to protect the cooling system against future leaks.

The sealant’s formula combines liquid glass (sodium silicate) with aramid and refractory fibers and is reinforced with carbon fiber to help bridge larger leaks and create the seal. The sealant also features the company’s proprietary Xtreme Cool wetting agent formulated to help reduce the surface tension of coolant to increase its wetting ability while improving heat transfer and reducing coolant temperature.