FrogAddict Posted January 5, 2017 Report Share Posted January 5, 2017 I've benefited greatly from advice given in this forum so I thought I'd contribute. I'm sure most of you experienced guys know this but here goes. When creating a PoP two piece mold, hold off on making any air vents until after your first pour. Your mold might pour wonderfully without it. I learned this the hard way. I vented all my molds at first (probably over vented) and then one day I decided to try and do a vent free mold. It poured great and I didn't have to cut off little tails all the time. 1 Quote Link to comment Share on other sites More sharing options...