The Cometic AFM gasket kit features chemically blown nitrile synthetic rubber bonded to an aluminum core for resilient sealing in demanding conditions. AFM material provides roughly 85% recovery with solid torque retention and temperature resistance over 205°F, and it is specified to perform without added sealants or the need for re-torquing after installation.
Cometic Mill Tech EVO / Buell 3.875in H&B Kit, .040inH/G , .018Afm B