WarriorWrap WW-ARC-30 Gray Fire-Retardant Arc Proofing Tape is strong enough for professional environments and gets the job done right the first time, every time. This tape is 30mil thick, 20ft long and has an unsupported, linerless design. When exposed to fire, the adhesive expands to create a char buildup which acts as a heat shield and flame barrier. The strong adhesion helps stick to uneven surfaces and provides comfortability when wrapping cables. Top breaking strength and elasticity make WarriorWrap an excellent choice in many professional applications.