Alum. Foil Fiber Reinforced Tape is suitable for sticking interface; sealing seams in scrim reinforced foil duct insulation; use in all weather condistions and when a maximum strength tape is needed. Backing: Aluminum Foil / Fiber scrim / Kraft paper Adhesive: High tack, synthetic rubber adhesive Liner: Non-contaminating, siliconized, flat, white paper release liner ( thickness below does not include liner ) Available width: 50mm, 72mm Available length: 50m Jumbo roll width: 1m, 1.2m, 1.3m