spray foam
Moderator: Brad Walker
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spray foam
i wonder if the spray foam greg was talking about in another thread would make a good backing to stiffen up a cured latex mold. put it on before the mold is removed. rosanna
I was hoping someone would pop up and tell us why my harebrained idea wouldn't work. I think your application (backing the latex) would be ideal. IT doesn't require any detail, does not heat up, and would be removable.
I've often wondered how people back up the thin latex, to fill the mold with anything. I Would use the cellophane though, just to assure that the foam doesn't stick to the latex.
Let me know if I need to patent yet another use for the spray foam. OH Important. Do NOT use the latex spray foam. It does not harden as hard as the other.
Greg
I've often wondered how people back up the thin latex, to fill the mold with anything. I Would use the cellophane though, just to assure that the foam doesn't stick to the latex.
Let me know if I need to patent yet another use for the spray foam. OH Important. Do NOT use the latex spray foam. It does not harden as hard as the other.
Greg
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Polyurethane foams like Great Stuff will stick to everything when cured. In thick sections there is some heat generated as they cure.
Whatever you do, don't get it on something you don't want it on. There is no solvent for the cured foam. Wear plastic gloves or you'll wear foam for a week or two.
Ron
Whatever you do, don't get it on something you don't want it on. There is no solvent for the cured foam. Wear plastic gloves or you'll wear foam for a week or two.
Ron
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Gregwatershed wrote:I was hoping someone would pop up and tell us why my harebrained idea wouldn't work. I think your application (backing the latex) would be ideal. IT doesn't require any detail, does not heat up, and would be removable.
I've often wondered how people back up the thin latex, to fill the mold with anything. I Would use the cellophane though, just to assure that the foam doesn't stick to the latex.
Let me know if I need to patent yet another use for the spray foam. OH Important. Do NOT use the latex spray foam. It does not harden as hard as the other.
Greg
I have backed up thin latex with a plaster "mother". Spray foam would probably work.
Bert
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Bert Weiss Art Glass*
http://www.customartglass.com
Furniture Lighting Sculpture Tableware
Architectural Commissions
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caulk instead of latex+spray foam
One alternative that might work for you and, if your pieces are small enough, not require any reinforcement is silicone caulk. It's cheaper and faster than latex (only need to do one thick coat). I do it outside or in a well-ventilated space w/a respirator b/c it stinks and isn't too healthy, and make sure that you're hands are wet and soapy so you can model it around your master form w/out it sticking everywhere. I learned this from a workshop taught by Stephen Paul Day, and it's worked great in my experience!!
let me know if you give this a try...
take care,
penny
let me know if you give this a try...
take care,
penny