Canon F1n Light Seals
USCamera custom Canon F1n (new) light seal kit includes 2 door channel seals, door hinge seal, and a replacement mirror cushion. The F1n New uses a 6-volt battery and has an A setting on the speed dial. All seals have adhesive already applied and to install, you just peel off the backing and press into place.
USCamera light seal placement guide for this Canon film camera here