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mold stuck in plaster cast

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mold stuck in plaster cast

Old 02-26-2024, 01:15 PM
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marc landry
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Default mold stuck in plaster cast

I dug out a mold my Dad made for a stepping stone. It is not silcone, but a low temperature rubber type. It is sitting in a plaster cast to hold it's shape and it is stuck in it, slightly askew. I may have to just try it the way it is and see how it comes out.
When I try to carefully pry the mold off of the plaster, it is really stuck, especially around the edges. I really want to try to preserve it, as it is a momento from my Dad, who just passed. Any ideas on how to get it out? I just tried wetting it around the edges.
I think this afternoon I will just try to pour it "as is" because I am afraid I am going to ruin it. Does anyone have any tips on peeling it out from the plaster? If it does not come out good, positioned as it is, should I crack the plaster from below and try to wash it away. I'd really like to preserve it. If the one I pour today, using cement and mold release, comes out OK, what material would you recommend for making a new mold?
Old 02-26-2024, 02:59 PM
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Outrider6
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Any chance you have an air compressor and can try to jet some air into and around the seam?
Old 03-01-2024, 10:01 AM
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marc landry
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Default air compressor

Originally Posted by Outrider6
Any chance you have an air compressor and can try to jet some air into and around the seam?
Thank you I will try that this weekend!

Old 03-01-2024, 06:34 PM
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Outrider6
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I learned that trick, removing handlebar grips on motorcycles and bicycles. It usually works like a charm.

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