Reply by Andybb

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Posted on Have you dealt with this problem? Looking for suggestions

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1939 posts in 1053 days

#1 posted 12-01-2018 10:04 PM

Disclaimer…This is just me thinking aloud.

1. Well, 110 is not much warmer than a 104 degree hot tub so it’s not an extreme environment IMO. More like luke warm. Hot coffee is more like 200*.

2. I’d consider Total Boat Penetrating Epoxy. Maybe 2 coats to insure a good seal or that then a coat of regular epoxy. (something that flows)

3. People make saunas out of cedar. (maybe pine too)

Would you even need to seal the inside? Titebond II and butt joints would have no problem with warm water. Those cedar saunas are bare wood. Maybe some wax just to keep it slippery assuming this is a mold that the soap will come out of when it’s cool and hard. Sand the inside to 400 grit and apply a coat of wax.

When you say “equilibrium” what do you mean? (don’t really know how to make soap) Just waiting for it to cool off?

Don’t know if I’d apply anything like a sealant on the outside with heat emanating from the inside, but that’s just a swag. (sophisticated wild ass guess). I think you’d not want anything that could retard the delta H.

Is this a fancy box that needs to look like a work of art or just a mold for making soap?? Does it have to be wood? If not then I’d consider HDPE. You can make that from milk bottles. HDPE soap molds

I guess I’m not sure if it has look good or just be functional. Another option if it’s just a mold is the silicone mold kits we use for casting pen blanks. Soap wouldn’t stick to that and it bends like rubber.

Naturally there are tons of soap making forums. One option I saw was just using a piece of saran wrap in the box and pouring the soap in. Then, no sealing necessary.

-- Andy - Seattle USA

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