Mr. Gasket Ultra-Seal Head Gaskets

Mr. Gasket Ultra-Seal Head Gaskets deliver proven, leak-free sealing technology for performance enthusiasts and professional engine builders who refuse to compromise. Engineered to handle the demands of stock replacement, high-performance street, drag racing, and oval track applications, the Ultra-Seal line brings a single trusted design philosophy to a broad range of engine builds.

Five-Layer Composite Construction

Ultra-Seal Head Gaskets are built around a five-layer composite architecture — a thermally conductive graphite core sandwiched between perforated steel outer layers. This construction delivers the structural rigidity needed to withstand extreme combustion pressures while allowing the gasket material to conform precisely to mating surfaces for a consistent, reliable seal.

Key Features:

• Graphite core thermal conductivity — actively transfers heat away from hot spots in the cylinder head, guarding against gasket burnout and protecting sealing surfaces over the long term
• Excellent compressibility and stability — maintains consistent clamping load through repeated heat cycles without cold-flow or creep
• High-temperature silicone coating — creates a positive seal against engine fluids including coolant and oil
• Cast iron and aluminum head compatible — will not brinell (indent) aluminum cylinder head surfaces
• High-temperature endurance — withstands the extreme thermal demands of performance combustion without becoming brittle or degrading
• No additional sealer required — ready to install straight from the package
• Broad application coverage — suitable for OE replacement, high-performance street, drag race, and oval track builds

Whether refreshing a stock engine or building a dedicated race motor, Mr. Gasket Ultra-Seal Head Gaskets provide the durability, heat management, and sealing integrity that serious performance applications demand. Each gasket is sold individually, making it easy to source exactly what your build requires.