Shurtape PC-622 Contractor Grade Duct Tape is a 12 mil thick premium-grade duct tape used for HVAC duct systems; the protection of window and door frames during stucco application; high performance motorsports applications; silk screening; and heavy duty bundling, sealing, seaming and splicing. Shurtape PC 622 has high tensile strength, is conformable, and has excellent holding power. UL 723 listed. It is currently offered in 5 stock colors: black, red, silver white and olive drab. PC 622 comes with Shurtape's Polyblended CO-EX technology with is a co-extrusion process which melds polyethylene, cloth and adhesive in a single, high-temperature step which results in a permanent, airtight bond (creates added strength which will not delaminate). Please note Shurtape's version of olive drab is very dark as displayed in the product photo.