I willl say on one last note as well that it appears to be a platnium silicone, there are two types of silicone platniumn and tin cure silicones. platinum is a finer quality less shrinkage(which is minimal even in tin cures)but contains a chemical solution of platinum which is expensive. Its expensive which means its picky(as all pricey women are) Platinumn silicone's and their cataylsts are picky, im buddies with one of their reps. First off platinum grade silicones will have curing issues if any of the following occures
-exceding shelf life(which is short and temperature sensitive)
-contact with sulfer containing products
-contact with aloe containing products
-in the same room as anything with orange citrus oils( dont eat a orange while molding it will find it I know....

-sealing a sculpt in clear coat wont matter if sulfer containing products are present
And on a last note i will defend smooth on further to say that there is no way it could be defective product, they make this stuff along with all their products in hugh batches which under go quality assurance. If they messed up you and everyone who ordered oomo-25 woulda had the same problem and a recall would have ben issued. Sorry not trying to pick on you by any means but i literally talked to my sales rep(great guy) about that same issue because people where bad mouthing them because they didnt take the time to learn the chemicals they were working with.