SBR (Styrene Butadiene Rubber) is the most commonly used handrail cover material. SKG SBR Handrails have a glossy black surface and stable shape dimensions. A protective coating of anti-aging additives diffuse into the surface of SBR handrails, protecting against dynamic stress, heat aging, and ozone found in the ambient air. The disadvantages of these additives include the discoloration of materials touching the protective film and the sticky surface caused by the anti-aging wax.