Duct and Insulation Tapes 600 Series   –  General purpose grade, waterproof   –  General purpose grade; waterproof, polycoated cloth; natural rubber adhesive (silver and colors available). Used for carpet, plumbing, HVAC, asbestos removal, waterproof packaging, patching, splicing, bundling, color coding; conformable, tears easily with no twist or curl. Meets Specs: UL 723, Flame Spread lndex-5, Smoke Development lndex-20.   –  Carolina Tape   –