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 Post subject: Mold materials
PostPosted: Tue Jun 24, 2003 4:17 pm 
You guys might remember that I have a lot of projects I planed on doing. There reason nothing has happened with that is I would like to cast my own pieces but have been having a horrible time at it. I use por a mold and every time after one or two uses the pieces I’m making manage to fuse to the mold despite my best efforts to make sure I got release agent everywhere it should be.

So anyone have any suggestions on a good mold material that wont bond with Por a Kast (so I don’;t have to worry about release agent) and is a simple as Por a Mold? I could also use help on finding a place to get it online.


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 Post subject: Re: Mold materials
PostPosted: Wed Jun 25, 2003 10:53 am 
Por-a-mold is a polyurethane rubber, I have no idea why SynAir recommend it for use with a por-a-kast (a polyurethane resin)!

You should try a silicone. I don't know where you could get it (in the US?) but SynAir make a product called sil-mold, you should be able to get this where you got your por-a-mold.

Max


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 Post subject: Re: Mold materials
PostPosted: Wed Jun 25, 2003 4:17 pm 
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Joined: Wed Nov 24, 1999 12:18 pm
Location: Palerang Shire, NSW, Australia
Was the mold material silicone or polyurethane based? Polyurethane plastic bonds to polyurethane molds. Not always, but not worth using.


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 Post subject: Re: Mold materials
PostPosted: Thu Jun 26, 2003 10:53 am 
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Joined: Wed Nov 24, 1999 12:18 pm
Location: Palerang Shire, NSW, Australia
Yep, definately get silicone. Polyurethane rubber will bond unless you coat it in grease. Not an ideal method.


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