About Cometic Gasket materials;

AFM

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 2500 F. AFM material has an 85% recovery while maintaining a strong torque retention. AFM does not require gasket sealers or silicone bead. Re-torque is NOT required.

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"

Spring Steel
A stainless steel core with a .001" thick coating of Viton rubber on both sides.
Available thickness: .010", .014”, .020"

MLS® (Multi-Layer Steel Head Gaskets)
Ideal for any application. Viton coated outer embossed spring steel layers with a steel inner layer that provides support to the gasket allowing multiple thickness. Retains torque (once the gasket takes a torqueset, re-torquing is not required).
Available thickness: .018”, .027”, .030”, .036", .040", .045”, .051”, .056", .060”, .066”, .070”, .075”, .080”, .092”,
.098”, .120", .140”

Copper (Dead Soft)
Available thickness: .005", .010", .016", .020", .027", .032", .043", .050", .063", .080", .094"