I have 2 stainless steel cylinders (very thin) that I want to fit together. One has a diameter of 10cm and the other a bit more (around 11cm). I was thinking of sealing them together with an O-ring, but I don't know if they are available in that size. Also it has to be able to withstand up to 300 degrees Celsius. Anyone know what I could use for such a task?
Wielding them together is not possible because the material is too thin and I don't want to drill holes in them to avoid making them less waterproof (it will contain oil)