Duct and Insulation Tapes 600 Series   –  Economy grade; waterproof, polycoated cloth   –  Economy grade; waterproof, polycoated cloth; natural rubber adhesive. For general purpose packaging, bundling, sealing, seaming applications; repairing, holding and waterproofing. Meets Spec: UL 723, Flame Spread lndex-5, Smoke Development lndex-5.   –  Carolina Tape   –