Apoxie Clay 3 Lb. Native Superior modeling, impressions, and detail finishing. Use this product if you are sensitive to solvent based epoxies. User friendly clay. Non-flammable, non-hazardous. No solvents or fumes. Complies with ASTM D.4236. Plasticity and handling features make this clay very user friendly. Strongly adheres to almost any clean surface . . . including ceramic, fiberglass, foam, glass, metal, plastics, resin, stone, wood, and more. Working time is about 2-3 hours. Cures to a hard, waterproof finish in 24 hours.