440 BUTYL Gasket - 500ft/Case Elgen’s UL 723 listed 440 Butyl Gasket is a high quality gray butyl gasket tape. It is designed for use with 4 bolt duct connection systems. It is non-curing and adheres extremely well to metal surface. 3/16” x 5/8” x 25’ of gray butyl tape extruded onto smooth silicone release paper and rolled onto a cardboard core. Apply in normal dry working conditions. All surfaces need be free of dust, dirt, oil, moisture, grease, etc. Apply directly from roll or cut to size with knife or scissors. Press 440 Butyl Gasket firmly into place with hand. Intimate contact must be made between tape and subsurface to assure a air-tight seal. Gently peel off silicone release paper. When lapping tape, allow at least 1/4” (6.4 mm) overlap. Box Quantity: 20 Rolls/25ft each = 500ft.
