I also have decorative silicone fondant mats in my liner repertoire (the ones with the raised, fancy designs on them). I think they are also known by the name of 'impression mats'. Anyway, they are awesome! I cut them to size just like I do with my mylar and dab Vaseline on the back of them to adhere them to my mold (also just like I do with my mylar).
IrishLass
So these dont leak around the edges? I've been wanting to try those as well but haven't yet because of the leak concern.