Making a mold of a wood positive??

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drokkul

Well-Known Hunter

• Jul 6, 2006

• #1

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!!!!

 

Q

Q99213

New Hunter

• Jul 6, 2006

• #2

what about painting the wood with a very, very light coat of epoxy resin? even just wipe it down with it?

 

CombatBaby

Well-Known Hunter

• Jul 7, 2006

• #3

couldn't you just spray it with release agent?

-=QuinN!

 

Y

yanvaq

New Hunter

• Jul 30, 2006

• #4

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.

 

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Hammer of Might

Active Hunter

• Jul 30, 2006

• #5

CombatBaby said:

couldn't you just spray it with release agent?

-=QuinN!

Click to expand...

That's what I would try.

 

Gilmortar

Well-Known Hunter

• Jul 30, 2006

• #6

Polyurethane. You can get it in a spray can at walmart/lowes/home depot.

 

patiam69

Active Hunter

• Sep 4, 2006

• #7

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