I have a problem when I watch this tutorials. I put the PlatSil(but not Platsil Gel-25,the PlatSil made in China) into the NSP mold,but a few hours passed, contact with NSP mold where the Platsil gel can not be curing, any place where no contact with NSP material is available. Before that, I also used the KRYOLAN Fixier Spray to fix the model surface. So I don't know what's wrong with it. Please help me or give me some advice, anxiously awaiting your reply, thanks.