Um, <gulp>. After the kind words I almost hate to say this, but I don’t think I’d ever put Press’n’Seal directly on a commercial heating plate. They get warmer than a heating pad and I don’t know if the residue from the adhesive would eventually cause issues. When I use it, I put it on a small, threadbare, throwaway towel over the pad so there’s a disposable surface between the Seal and the pad itself. Now that said, if it’s working for you and you are comfortable doing it, hey, great! I just didn’t want someone coming back later saying “I put Press’n’Seal on my heating plate and it melted and ruined it.”