Tjikko Leaklock Aluminium single sided self-adhesive butyl rubber tape is an exclusive laminate of reflective aluminium foil, rugged, cross-linked polymer films, and a thick layer of butyl rubber. Butyl Repair Tape is mainly made of butyl rubber, it gives best performance on corrosion resistance, UV resistance, oxide resistance; it is used for water-proof, sealing, low temperature adaption. Main application: (1) Steel construction, sun panel, drain parts; (2) Window & door; concrete roof; pipes (3) PC panel. (4) Car industry. (5) Repairing of roof and cars. Advantage of Tape: Tape is extremely sticky, work in small amounts at a time. You can overlap the tape on itself if you need to cover larger areas. Start at the lowest sloped point and work up. Tape can be coated or caulked over. Adhesion increases over time. Roughen/Sand plastic surfaces before applying Tape. This butyl tape is soft pure butyl rubber. mainly used for building construction's sealing usage