|Best Mix FAQ
Q: I get bubbles on the surface
of my mold. How can I reduce these?
A: Bubbles occur when Best
Mix Mold Mix is poured into a mold and not shaken or vibrated
enough to move bubbles up and off the surface of the master
mold. Try an orbital sander or shake the mold hard enough to
move the Best Mix in the mold. In the mean time, fill the holes
with kiln wash or clay and get slumping!
Q: I added too much water. How
do I fix this?
A: A little too much water is OK. If the mixture
seems too soupy, then add a little more Best Mix Mold Mix and
Q: What other mold releases are
A: Anything that will not easily wash away with water. We
have had some success with olive oil and paraffin based products.
Olive oil is our favorite.
Q: There is a crackly look or
"gator skin" to the surface of my mold. What causes this?
Some times small cracks develop on the surface of the casting.
This can be caused by a variety of issues. Too much mineral
content, too much shaking and the mold release stirs up with the
mix, an unknown release agent, too much water or drying the
casting too fast. For slumpers this is rarely an issue. Try
painting with kiln wash and slump.
Q: What can I use to seal my own
master molds with?
A: Epoxy, varnish (we have used a marine
grade varnish, lacquer and liquid PVC (highly recommended).
Q: I get a dull look around the
edges of my mold. Why is that?
A: This usually happens when
there is not a water-tight seal and water leaks out during mold
set up. Use a gasket or create a better seal and make another