found molds

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Guspuppy

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I know I saw this somewhere but I can't seem to find it again after an hour of reading the forum! What are the numbers on plastic that are safe to use for CP molds? I was looking at a Stouffer's Mac N Cheese dish thinking it would be perfect to make two large bars in. It's got a 1 on the bottom. I'd think it is safe since you can put it in a 350° oven, but maybe the chemicals in soap make the difference not the heat?
 

Navaria

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I believe I've seen posted that 2 and 5 are safe. But I can't say 100% for sure.
 

shunt2011

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Yes, 2 or 5 work best. Others may work if you line them with a garbage bag or something.
 

cmzaha

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I have been using the same hdpe #2 buckets for over 5 yrs, a few are just now starting to show some bowing from heat. This is from mixing a gallon or more of masterbatch lye at a time. When I am mixing that much lye I do put cold water and some ice in the sink to help a little with the heat.
 
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