Author Topic: Ultracal on hydrocal  (Read 93 times)

hidebehindthemask

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Ultracal on hydrocal
« on: June 09, 2017, 06:41:04 AM »
I made my mold using hydrocal but it is thin in spots so I would like to add a little more strength to it.  I don't have more hydrocal but have ultracal.   Is it ok to add one over the other even after the one has been dry for a week?