Duct and Insulation Tapes 600 Series   –  Quality grade, polycoated cloth   –  Quality grade, polycoated cloth; high tack, natural rubber adhesive. For indoor/outdoor applications in industrial, HVAC, utilities, trucking and automotive applications; used to repair, seam, hold, protect, mask, create moisture barrier, bundle and splice. Meets Spec: UL 723, Flame Spread lndex-5, Smoke Development lndex-25.   –  Carolina Tape   –