Silicone mask making mold problems

[merquades]

Hey folks I have had real problems with clay from my sculpture sticking to the easyflo 120 mold. I used a release, macwax which didn't really help at all. Spent a day and a half cleaning it all off. Anyone had experience of the best clay to use to avoid this situation?

 

[Duncanator]

Are you using a silicone mold? I'm not familiar with Easyflo120, but my google search shows it to be a rigid urethane casting material.

Are you making rigid mold with the urethane?

 

[merquades]

Are you using a silicone mold? I'm not familiar with Easyflo120, but my google search shows it to be a rigid urethane casting material.

Are you making rigid mold with the urethane?

Yes a rigid urethane mold for casting a silicone head. It warms up I think when setting and the clay sticks very badly to it. I think it may be the clay that I used so will experiment with other clays

 

[rbeach84]

Urethane reactions are exothermic, so that could be it. Perhaps put the clay form into the freezer before,,,nope that might retard the curing!
You're using a mold release of some kind?