ArtResin works great for coasters, but not so great for hot plates and here’s why. The maximum temperature that cured ArtResin can be exposed to is 120F/50C. Any temperature higher than 120F/50C, such as those from a dish straight out of the oven, may lead to some irreparable damage on your resined surface. The heat generated from the bottom of a hot mug, on the other hand, is nowhere near that hot so you can put it on a coaster without worry.