Protect your building from moisture damage with Laydex Polythene 1200g. This high-quality polythene sheet is designed for use on solid concrete ground floors and can also be used as a concrete underlay or curing blanket. It resists attacks from acid or alkaline soils and won't deteriorate when in contact with water, lasting the lifetime of the concrete slab. The 3.5mt x 15mt sheet provides a reliable moisture and vapour barrier for concrete slab ground floors.