Can you use insulation foam as a mold maker?
Jul 1
I was thinking. Would it be possible to create a mold of a item by using insulation foam (The canned stuff that expands) ontop. Then allow to dry and cut it in half.
Then pour in plaster of paris and create a new cast.
Or visa versa, cover in plaster of paris, then fill it in with foam.
Would it work?
Nice thought, but doubt if it would work. That stuff is soooooooo sticky that you problay would not be able to get it off of whatever that you poured it on. I tried to remove some from several things, like pipe and wood and you cant get the stuff off.
Filed under: Foam Insulation
Nice thought, but doubt if it would work. That stuff is soooooooo sticky that you problay would not be able to get it off of whatever that you poured it on. I tried to remove some from several things, like pipe and wood and you cant get the stuff off.
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I have to agree with answer one in that the foam has adhesive properties, hence it’s ability to SEAL as well as offer modest insulation.
Not at all knowing what you wish to mold to any form, I might consider fiberglass cloth and resin, over something using release agents, though that also depends on voids, surrounds, cravaces etc.. You could use liquid rubber if the object being molded is smooth enough. Old school plaster objects were often moled in rubber that could be peeled off and re-used.
Part of the issue in the end will be that the process is a cold mold, or one that and molding material won’t react with anything poured into it, and certainly a mold material that won’t react with the object being molded.
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there are two kinds of foam the sticky stuff in the blue can, and the hard stuff in the red can. the red can stuff dries hard and might work, but the cast would be pretty rough and would require a lot of finish work to make it smooth. it certainly cant hurt to try.
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yes, but spray the item lightly with a nonstick food spray first, then use a square box to mold it in, suspend, item in box
when ready to mold it again support the sides and bottom,
build a wooden box to put it in, with top open,
References :
maint man