Sika Igolflex R is a bitumen-rubber-based waterproofing coating designed for below-ground structures and retaining walls. It provides excellent crack-bridging, flexibility, and adhesion to concrete, masonry, and metal. Ready-to-use and solvent-free, it forms a seamless, elastic membrane that resists water and aggressive soil chemicals. Applied in two coats with a brush or trowel, it’s ideal for basement walls, foundations, and damp-proofing in fencing and retaining applications.