The 3M Safety-Walk Anti-Slip Tread Extra Strong (Type 4) Series 700 provides additional slip resistance in extreme, heavily trafficked areas. It is made from particularly large mineral particles that ensure a stable, slip-resistant surface in the presence of oil and mud. The open grit pattern resists clogging and reduces cleaning time. Suitable for agricultural and forestry equipment, ship and aircraft decks, rail vehicles, oily and wet environments, machine halls, road construction, civil engineering, trucks, tractors, construction machinery, and building equipment. Particularly effective on concrete (painted and primed), sturdy bricks, metal, and porous surfaces (when primed).