Insta-Frac is an instant refractory material used for repairing and adding to ceramic crowns, porcelain laminates, Dicor crowns, inlays, onlays, etc. Itís also used for making custom firing pegs and all types of porcelain add-ons, except margins. The material is carbon free and non-contaminating. Can be used up to 3,200-degrees Fahrenheit. Available in 2 oz. tube and sold individually.