Discussion on Making a mold of a wood positive?? within the Prop Building Workshop forum, part of the Community category; If I'm using wood for my master would a layer
If I'm using wood for my master would a layer (or two) of primer be enough of a sealant to use RTV Silicone and not have it stick into the "pourous" surface of the wood?
Don't get me wrong... the wood is gonna be pretty smooth anyway, but I believe I've read that wood is hard to mold without it wanting to stick to the mold material.
If those in the know could reply to this I would be very grateful!!!!
what about painting the wood with a very, very light coat of epoxy resin? even just wipe it down with it?
couldn't you just spray it with release agent?
-=QuinN!
I just did this with a Klingon disruptor . What you want to do is coat your wood sculpt with sanding sealer . then the silicon can't get in to the grain of the wood to make it stick or pick up the grain to show in your cast later.
That's what I would try.Originally Posted by CombatBaby
Polyurethane. You can get it in a spray can at walmart/lowes/home depot.
spray it with some clear lacquer and sand it smooth. i know a guy that makes custom fishing works and he carves them out of dowl then seals them with lacquer then molds them with silicone
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