AXEL TIGHT 112GS O-RING is a ring-shaped waterproofing seal composed of refined rubber and inorganic, water-absorbent swelling polymers. Typically installed around bolts or strainers and cast directly into concrete walls, it provides reliable moisture protection. The material expands upon contact with water to fill and seal gaps, it is frequently referred to as a swellable waterstop or seal ring. It is primarily utilized to prevent corrosion on embedded steel components, such as reinforcement bars and pipes that traverse structural joints or cracks. It features a lower expansion rate, making it ideal for applications with standard or moderate water-resistance demands.