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Does plaster stick to styrene? Scenery and structures
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MRH Author 5,540 posts Michael Tondee MRH Author 5,540 posts
Michael Tondee

Having finally gotten around to making a mold for my bridge footings, I'm anxious to try it out. It's the first time I've made any sort of mold though besides a rock mold with latex rubber. I made it with plastic for a " For Sale" type sign which I assume is styrene. The plastic is soft enough to lightly score with a knife and snap. I'd like to use the mold more than once so I wonder if I will be able to get the casting out without tearing up the mold. Will the plaster stick to the mold?  Should I use a release agent like wet water or maybe some crisco?

Thanks,

Michael

Michael, A.R.S. W4HIJ

 Model Rail, electronics experimenter and "mad scientist" for over 50 years.

Member of  "The Amigos" and staunch disciple of the "Wizard of Monterey"

My Pike: The Blackwater Island Logging&Mining Co.
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wp8thsub MRH Author 3,348 posts
wp8thsub

Should Work Fine

I have some homemade plastic molds I've used for various things and they come loose from plaster rather easily.  Mold release doesn't seem to be needed.

Rob Spangler MRH Blog
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LKandO Prolific poster 3,839 posts
LKandO

Agree, should work

Hotel key cards are same plastic as for sale sign. Have used them many times to spread plaster. It doesn't stick to them at all.

Alan

All the details:  http://www.LKOrailroad.com        Just the highlights:  MRH blog

When I was a kid... no wait, I still do that. HO, 28x32, double deck, 1969, RailPro
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Michael Tondee MRH Author 5,540 posts
Michael Tondee

Thanks guys...

I appreciate it. I think I over thought this whole mold making thing. It was really easy to make it from the plastic. I got busy with other non railroad stuff though and the break helped me get over the hump.

Regards,

Michael

Michael, A.R.S. W4HIJ

 Model Rail, electronics experimenter and "mad scientist" for over 50 years.

Member of  "The Amigos" and staunch disciple of the "Wizard of Monterey"

My Pike: The Blackwater Island Logging&Mining Co.
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Michael Tondee MRH Author 5,540 posts
Michael Tondee

YES!!!!!

It worked beautifully!

Michael

Michael, A.R.S. W4HIJ

 Model Rail, electronics experimenter and "mad scientist" for over 50 years.

Member of  "The Amigos" and staunch disciple of the "Wizard of Monterey"

My Pike: The Blackwater Island Logging&Mining Co.
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