Sapid Extra Large Silicone Sheet for Crafts 23.6"×31.4", Thick Silicone Jewelry Casting Mats, Nonstick Nonslip Silicon Mat for Epoxy Resin, Art Painting, Heat- Resistance Counter Mat (Gray)

comments:

jhyland87 posted on r/chemistry3d

That's what I use to use. I got a little irritated with the raised sides. I now mostly use this:https://www.amazon.com/Silicone-23-6-%C3%9731-4-Nonstick-Resistance/dp/B096SKLN8L?th=1

Sapid Extra Large Silicone Sheet for Crafts 23.6"×31.4", Thick Silicone Jewelry Casting Mats, Nonstick Nonslip Silicon Mat for Epoxy Resin, Art Painting, Heat- Resistance Counter Mat (Gray) | eaves-shop