T.R.U. NST-20 Non-Skid Tape or Anti-Slip TapeT.R.U. NST-20 is a Non-Skid Tape that is waterproof because of its backing. This high traction anti-slip tape is 32 Mil. 60 Grit Silicon Carbide; surface is similar in feel to 60 grit sandpaper therefore it is not appropriate for bare feet. Also, it is coated with an aggressive acrylic adhesive (better adhesive than synthetic Rubber) that cannot be submerge into the water or applied underwater; when applying the surface needs to be dry and free of any debris so the adhesive bond can form properly. If when apply there is any gap that would allow the water to seep underneath of the tape, water will degrade the adhesive very quick. T.R.U. NST-20 complies with OSHA 1910.263 (3).10 Colors available White - Semi-Transparent - Black - Yellow - Red - Purple - Green - Orange - Gray - Dark Blue - Black&YellowApplications Uses for the Heavy-Duty Tape include: indoors or outdoors; on Walkways - Ramps - Stairways - in Machine shops - Work areas stairs - Pool areas - Skateboards - Garage stepsProperties Adhesive: Acrylic Thickness: 32 mils (carrier + adhesive) Release Liner: Paper Carrier/Backing: 60 Grit silicone carbide Adhesion: 60 oz/in (to stainless steel test panel) Tensile Strength: 36 lbs/in Certifications: OSHA 1910.263(3) Core: 3 inch diameterNote: - Sizes will be the tape industry standard metric sizes, ex. 12mm for every 1/2 inch of nominal value tape width (Rolls are give or take 5% wider or narrower than the nominal size).- Color Semi-Transparent is partially transparent while the color white is completely opaque