Stephen
The type of gasket material you choose will depend on temperature, what fluids are around and pressure
You can buy sheets of gasket material, corn flakes packets have been used for lots of gaskets over the years.
If you have oils or solvents, you might need to use silicon rubber sheet, which is resistant to some materials. Silicone rubber tube is used for fuel lines on model aircraft
You can probably get advice on what sort of materials can be used with which sorts of rubber, on line, from the webpages of suppliers of O rings, which are available in a variety of materials
What you can cut with the laser is up to others to advise!
Stephen
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