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MLS (Multi Layer Steel)

The Cometic MLS gasket is comprised of three layers of Stainless Steel. Cometic uses Stainless steel for increased strength, it's ability to rebound and corrosion resistance. The outer layers of the gasket are embossed and coated on both sides with a flouroelastomer rubber based material (Viton) designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes. The Viton coating is heat resistant to 2500C or 4820F. The center or shim layer of the gasket is comprised of an uncoated Stainless Steel layer, which can be varied to accommodate multiple thickness requirements. The MLS gasket is ideal for both aluminum heads to cast iron blocks and aluminum heads to aluminum blocks. Gasket Materials The composition of MLS will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is necessary. By design the MLS gasket promotes an even torque load across the sealing surface allowing for measurable reduced bore distortion.
Available thickness: .027", .030", .036", .040", .045", .051", .060", .065", .071", .074", .120"

The gas filled o-ring portion of Phuzion is manufactured from high strength aerospace tubing capable of withstanding ultra high combustion temperatures and pressures. Additionally each ring is plated with silver to increase the sealing level and minimize brinelling. The silver also aids in withstanding head to block movements without burnishing the surfaces. The real innovation to the gas filled o-ring though, is the gas itself. During the manufacturing process the gas in the ring is sealed in at 500-600 psi at room temperature. As the engine is warmed up, the gas is heated increasing the pressure inside the ring causing it to expand. This allows the ring to seal the combustion even in the event of head liftoff.

The MLS gasket portion of Phuzion is what gives you the ability to use the gas filled o-rings without machining any grooves in your block and/or head. MLS head gaskets are comprised of three layers. Viton coated embossed spring steel outer layers and a steel inner layer, which provides support and thickness to the gasket. Embossments on the MLS gasket allow for proper seal around oil and water passages.

Phuzion Requirements:
Head and Deck surfaces should be within
.002" of flatness and have a surface finish of
50RA or finer. The compressed operating
thickness of Phuzion is .051".

AFM (Aluminum Foam Material)

Is the ideal gasket material for machined surfaces, especially when used between two uneven stamped surfaces that have been plated. AFM is a chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core with temperature resistance of over 2500F. AFM material has an 85% recovery while maintaining strong torque retention. AFM does not require gasket sealers or silicone bead. Re-torque is not required.
Available thickness: .018", .032", .045", .060"

CFM-20

A perforated steel core with an elastomer surface is ideal for head gaskets allowing heat to be drawn evenly across the gasket surface while providing maximum sealing characteristics when exposed to coolants and oils.
Available thickness: .043", .059"

Aramid Fiber

Is a premium hi-temperature, hi-density creep resistant material that requires no retorquing and is fuel resistant. All Cometic fiber materials are asbestos free and require no additional sealants.
Available thickness: .012", .015", .020", .031", .039", .047", .060", .094", .125", .188"

Copper (Dead Soft)

Available thickness: .005", .010", .016", .020", .027", .032",
.043", .050", .063", .080", .094"

Armor Clad

Ideal for exhaust gasket applications. Can withstand temperatures up to 20000F. Compressable to seal less than perfect sealing surfaces. Retains torque.
Available thickness: .042", .064"