How to Make Coasters - Warning! Read this before you make ceramic tile coasters
Amazon.com: Epoxy Resin Kit for Beginners, Coating and Casting with Coaster Molds, Pigments, Mica Powder, Foil Flakes, Crystal Clear Art Resin for Art, Crafts, Jewelry, DIY, Jewelry, River Table
Best Heat Resistant Sealing Finishes for Tiles and Coasters