"Hey Rain. Thank you for the article, this really contributes to use 3d printing for many more applications. I have done this in the past with the normal cheap 1K clear silicone sealant. the one that is hardening acidic and smells like vinegar during hardening stage. It worked pretty well, you just need some more time for hardening in mould. Let it sit 3-5 days and it should be good. :-) Safes some money as you don't need the vacuum chamber."