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Bar’s Leaks Professional Carbon Fiber Block Seal Keeps Working Long After Installation

HOLLY, Mich. — Now that the cold weather is here, many of your customers will be looking for cost-effective solutions to cooling system leaks and blown head gaskets. For the longest-lasting and easiest-to-use protection, step them up to Bar’s Leaks® Professional Carbon Fiber Block Seal Head Gasket & Cooling Sealant.

Bar’s Leaks Professional Carbon Fiber Block Seal Head Gasket & Cooling Sealant (p/n HG-1) is the strongest antifreeze-compatible cooling system repair on the market, according to the company. The exclusive Bar’s Leaks formula combines liquid glass (sodium silicate) with aramid and refractory fibers: the same super-strong, heat-resistant materials used in bulletproof vests and fireproof clothing. The formula is further reinforced with carbon fiber to bridge larger leaks and create a truly permanent seal that is stronger than the original head gasket itself. These fibers serve the same role as rebar does in concrete: providing a strong foundation and ongoing support. Just as concrete poured without rebar will be weaker and more likely to crack, stop leak products formulated without fibers are inherently weaker and won’t be able to stop large leaks or create a permanent seal.

Bar’s Leaks Head Gasket & Cooling Sealant also features the proprietary wetting agent Xtreme Cool®. Xtreme Cool reduces the surface tension of coolant, increasing its wetting ability, while improving heat transfer and reducing coolant temperature.

Not only will Bar’s Leaks Head Gasket & Cooling Sealant fix leaks and blown head gaskets that other products won’t, it also stays in the system to prevent future leaks long after initial installation.

“Many other chemical head gasket repair products require multiple, time-consuming steps that conclude with draining the additive out of the cooling system. Once that additive is gone, if the leak comes back or another one occurs, you have to start all over again,” says Clay Parks, vice president of strategic development for Bar’s Products. “Our Carbon Fiber Block Seal product can be added directly to existing antifreeze, and then it remains there guarding against future leaks. For example, say your customer is looking for a solution to a leak in one of the head gaskets in his vehicle’s V6 engine. If he installs certain competitive products, that initial leak may be sealed, but when the other head gasket starts to leak, he will have to buy another bottle and go through the process again. With Bar’s Leaks Professional Carbon Fiber Block Seal, he would never even know that the other side had started leaking, because our product would seal it right away. With Bar’s Leaks, he can install it and then forget about it.”

Originally developed for professional technicians, Bar’s Leaks Head Gasket & Cooling Sealant permanently seals any coolant leak in plastic, cast iron, copper, and aluminum radiators, heater cores, freeze plugs, gaskets, intake manifolds, cylinder heads and engine blocks. It repairs blown head and intake gasket leaks, seals cracked cylinder heads and blocks, stops heater core and radiator leaks, fixes leaking freeze and core plugs, and stops overheating in any water-cooled car, truck, van or SUV.

Bar’s Leaks Head Gasket & Cooling Sealant is compatible with all types of coolant, including yellow, orange, pink, red, blue and green silicate-based and non-silicate-based (OAT/HOAT) antifreeze, and/or water.

Bar’s Leaks Professional Carbon Fiber Block Seal Head Gasket & Cooling Sealant is available to distribution in case packs of four. Like all Bar’s Leaks products, it is made in the U.S.A. The label includes directions in both English and Spanish.

For more information about Bar’s Leaks Head Gasket & Cooling Sealant, call (800) 345-6572, e-mail [email protected], or visit the website at Follow Bar's Products on Twitter at, on Facebook at, on YouTube at and through the blog at

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