Blue and grey are B level tack whereas white is A level, high level of tack.
Clean-Step™ tacky mats traps and keeps out impurities, dust and particles. Justrite Blue, 080S1836BU The sticky mat is not damaged by footwear or wheels, does not slip, is noncontaminating. | Justrite Blue, 080S1836BU Numbered tabs ensure one sheet at a time removal and indicate number of remaining layers..