Repair any leakage or fill any gap with this heavy duty aluminium tape and seal off vapor and any vapor or moisture leakage from AC or heater. A perfect insulating tape and joining tape for AC and heater repair purpose. Repair other electric material that need insulation and sealing. 3-way Foil-Scrim-Kraft backing, combined with a transparent high performance synthetic rubber- resin adhesive, protected by an easy-release silicone release paper.