Respuesta a "Are replacement lightseals/gaskets for Yashica 35mm cameras available?"Sponge rubber works fine. Can be purchased in sheets for next to nothing in craft shops (comes in many color since it is popular with small kids to build all sort of things for mothers day and the like), these shops even have dedicated glue for it . After cleaning of the older seals (as described by Dan above), cut the sponge rubber to size. Most of the time you won't even need glue since the new seal will hold itself in place.