I bought some essentials plastic in Sept. I just got around to using it this weekend or tried to. Found that after hearing it up to 330 it poured real nice but it took a lot longer to solidify and even afterwards it seems very soft compared to what I'm used to seeing from the same plastic. Question is is there a time limit on its lifetime or did I get another batch of the bad stuff from essentials. I bought another gallon prior to that from another supplier and it was bad. They did make it right but bought this gallon in Sept having poor results with it. Thanks for any suggestions