"Latex moldmaking compound." Topic
3 Posts
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Tango01  | 05 May 2013 9:37 p.m. PST |
Of possible interest?
Interesting tutorial. link Hope you enjoy!. Amicalement
Armand |
| bsrlee | 06 May 2013 3:24 a.m. PST |
That is RTV, not latex. RTV is a 2 part 'rubber' while latex rubber is single part – it cures by evaporation rather than catalytic reaction. So RTV can be poured as a single block and will cure regardless (well, almost) while latex has to be painted on in thin layers and each layer has to be allowed to cure completely before the next layer is added. RTV will not stick to anything except other RTV – which is useful for some processes – while latex will stick to most things including itself. There are a whole lot of other differences which make both of them useful for a variety of uses, some the same and some different. |
| Kayl MacLaren | 06 May 2013 6:34 a.m. PST |
I buy most of my RTV silicon from TAP plastics. The one thing not mentioned in the article is that gas is produced by the RTV as it cures. This causes bubbles in the mold. There are ways to mitigate this a bit, but the only way to keep the mold completely bubble-free is to have a compression chamber. |
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