sealing cylinders

I was wondering if somebody could advise on the best way of sealing cylinders (and valves) I bought some vey thin rubber from e-bay and thought this might be ok for fastening between the boiler and cylinder on a Minnie traction engine?. I am also aware of some other ways of effecting a seal, but could someone suggest a sealant compound

I would have thought gasket material was the answer I don't think rubber would be suitable thin cork possibly

Roy

A lot will depend on how good the jointing faces are, you could get away with a smear of Graphite Foliac or the more traditional method of thin 1/64" sheet jointing (gasket) with a smear of something like Stag or Hylomar on each side.

The rest of the cylinder covers, valve chest etc on a small engine like this can be done with a liquid gasket which you should be able to get from Halfords or e-bay. The advantage of this is that it adds no noticable thickness to teh joint so parts don't have to be made with an allowance for gasket thickness.

Blue Hylomar and sheet jointing here

Thanks very much for the useful and informative replies (and the link Jason)

would have thought shelac better than hylomar

LOCTITE SI 596 Red High Temp RTV Silicone Adhesive Sealant is good to 316 C or LOCTITE SI 5920 Copper High Temp RTV Silicone Gasket good to 371 C but there other high temp sealants.