Foamet (Foam Coated Metal) with a silicone bead. OEM replacement reference 17369-06. James' Foamet gasket material has an aluminum core with a thin nitrile synthetic rubber foam layer bonded to both sides.
Fits: > 06-17 (NU) Dyna; 07-18 (NU) Softail (excl. 2018 FLSB Sport Glide); 07-25 FLT/Touring; 09-25 Trikes