ELK Tape Roll Anti-Slip Tape in the Anti-Slip Tape department at Lowes.com
Amazon.com: LifeGrip Anti Slip Transparent Anti Slip Tape, 4 inch by 30 feet, Non-Slip Traction Grip Tape to Tubs, Boats, Stairs, Clear, Soft, Comfortable for Bare feet (4" X 30') : Home