Duct and Insulation Tapes 600 Series   –  Premium grade, waterproof   –  Premium grade; waterproof, polycoated cloth; natural rubber adhesive. For silk screening, HVAC duct systems; demanding industrial uses and protection of metal window frames, metal and plastic swimming pool parts; provides moisture free barrier for packaging, sealing and motorsports applications; excellent properties. Meets Spec: UL 723, Flame Spread lndex-10, Smoke Development lndex-25.   –  Carolina Tape   –