Our metal AB casting glue (50ml) is made of A glue: epoxy resin, calcium carbonate; B glue: Carefully formulated with toluene and epoxy amino amine. It is specially designed to address the drawback that ordinary welding cannot process. The usage method is extremely convenient: 1. Wipe the area to be applied. 2. Insert the push rod and extrude an equal proportion of the colloid. 3. Stir the colloid thoroughly and evenly. 4. Apply the mixed colloid to the crack. 5. Let it stand for 24 hours. 6. Done. And it is mainly used to repair various casting defects of steel, iron, aluminum and other castings, such as sand holes, gas holes, cracks, etc.