 You've heard us say art resin epoxy resin is completely safe to use. How do you know for sure? It's certified by the American Society for Testing and Materials. ASTM D4236 is a federal requirement for art materials intended for home use. All products bearing this number have been tested to ensure their safety and to alert consumers of any health hazards that may result from using the material. If the resin you're using doesn't have ASTM D4236 written on it, it very likely poses some serious health threats. Be safe. Art resin contains no VOCs, no fumes, and no respirator is required with proper ventilation. It's certified non-toxic by a board-designated toxicologist, so relax and enjoy getting creative.