Product description Craft concrete, gray, 1500g Weather-resistant craft concrete, whose mold materials are suitable acrylic, plastic, silicone, paper pulp, etc.. Mixing ratio: approx. 1.5 parts water and 10 parts craft concrete. Drying time approx. 3 hours, It takes 1-2 days to dry completely, depending on the thickness of the work. Add review Reviews (0)