Steel putty is an excellent product for repairing a crack in metal such as a motor block. Also great for cast iron. Temperature resistance: 120 ° C It is important to secure the crack by stainless steel mesh or staples. This absorbs the tensile strength. Kneadable putty metal only adheres to a well-pre-treated surface. Use the Loctite 7063 and coarse sandpaper for this. A leaflet with tips for working with epoxy will be added to the order. It explains how the crack can best be repaired step by step.