Hydrostone/ Hydrocal/ Gypsum cement quick dry technique?

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helix_3

Active Member
I'm making a few items out of Hydrostone, and I want them done and dry as quickly as possible.

The TDS says, "The maximum temperature at which HYDRO-STONE Gypsum Cement casts are safe from calcination is 120 °F (49 °C).With substantial free water in the cast piece, higher drying temperatures can be used without difficulty". I am circulating air in a box using a hair dryer on low, which never gets above 120F. It works alright- faster than room temp curing, but still requires 6+ hours of heating.

Are there any techniques to drive this number down further?
 

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clonesix

Sr Member
RPF PREMIUM MEMBER
Yeah, strength is in the curing (not Drying)

20 minute to solid not fast enough?? You could go with resin which solidifies in 5 minutes at 10X the cost. Why?

Just let it cure. If you mean "Drying," as in losing moisture, just it cure. May I ask why you need it "Dry"?
 

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