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 Post subject: Help (por a mold problem)
PostPosted: Wed Oct 23, 2002 6:36 am 
Alright i've worked hard and goten everything perfect, but it's still no working, bt now it's consistant in how it isn't working.

now the mold refuses to harden at the spliting point (it's a two part mold) i've done it before and this didn't happen, is it possible that the petrolium jelly i'm using is somehow contaminated?


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 Post subject: 2 part molds
PostPosted: Thu Oct 24, 2002 6:36 am 
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Joined: Tue Oct 09, 2001 6:14 am
Location: Orange County, CA, USA
I've tried to stay away from them for the very same reasons. The second part of the mold seems to set unacceptably soft with vaseline.

I think you should be able to get away with spraying the first part of the mold with lots of releasing agent (like synair 531) before putting down your second layer of molding material.


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 Post subject: Help is here
PostPosted: Sat Oct 26, 2002 8:50 pm 
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Joined: Wed Nov 24, 1999 12:18 pm
Location: Palerang Shire, NSW, Australia
Using petroleum jelly is fine. But you don't need to add a thick layer, only a smooth glazed surface. I think the problem will be more in the amount of catalyst you are putting in. Is this the blue synair product? If it is, that definately the cause.

I have updated the site with more building articles and a molding guide is coming very soon. Sorry to have neglected this area for so long. I just never think to take photos when i'm molding.


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