Thanks Camedia,
Well I actually ordered a pack of light seals from Japan. They used to sell it as a kit, including glue and cutter. But now they ship just the foam without adhesives. I don't quite dare use just any materials out there, as some of my cameras are for collection. What works today might eat into the paint and metal in a few years.
I am sure everybody has seen stains left behind by innocent looking double sided tape after a few years. On the other hand, whatever they used on the Yashica 35 left no mark even after more then 20 years.