O-Ring Mould

This is a mould that you can 3D print to make your own size O-Ring for your waterproof project (actually I don't know if this is a great sealing ring but if you tried let know the community in the comment).

This one is a 19in/16 OD by 15in/16 ID and there is another one who's 1in OD by 13in/26 ID. This one's mould is square but I preferred the circle one because it's easier to put the two pieces in the right place.

I use this silicone moulding paste: https://www.deserres.ca/fr/gedeo-silicone-moulding-p-siligum-300g

For removing the circle you have to put a screw (M3) or another thing that can go through the hole so you can push the top off and release the o-ring.