This product is reusable and water can be added to wet it. Below are the instructions from the jar. Anti-Heat absorbing compound shapes like putty and will not burn, crack, melt, swell, or interrupt alignment. Use when welding, to hold irregular parts firmly in place. Anti-Heat may be used as a heat dam to prevent heat from traveling to areas that may be damaged by heat, such as enameled sections, rubber, glass, paint, and will help minimize distortion when welding on sheet metal. DIRECTIONS: Using a thin layer of Anti-Heat, cover entire area to be protected. In case of extreme heat, use thicker covering. When used for positioning, treat each part individually. Place one part on a mound of Anti-Heat as the other part is placed on a separate mound of Anti-Heat. Position parts as desired. May be reconstituted with water for reuse. Made in U.S.A. WARNING: Protect yourself and others. Read and understand the label. Welding generates FUMES and GASES that can be dangerous to your health, ARC RAYS that can injure eyes and burn skin, and, in some cases, ELECTRIC SHOCK that can kill. • Read and understand the manufacturer’s instructions regarding your welding equipment and employ standard safety practices. • Avoid inhaling fumes. Use enough ventilation, exhaust at the arc, or both, to keep fumes and gases away from your breathing zone and the general area. • Wear correct eye, ear, and body protection. • Wash hands after handling this product.