Before use of the Araldite Rapid Twin, make sure surfaces are clean and free from dust, corrosion, dirt, and grease. For optimum bonding, slightly roughen surfaces with sandpaper and degrease metals with a suitable solvent. During assembly, apply light pressure to the joint until set (clamps, tape) around 20 minutes. Allow 2 hours to attain full strength before rough handling or sanding. The Araldite Rapid Twin bonds metal, wood, masonry, ceramics, glass, dry concrete, chipboard, leather, cardboard, fabric, rubber, and most plastics (except polyethylene and polypropylene). It comes in a 15ml twin pack.