The IKO Challenger sand surfaced underlay can be used where additional surfacing in the form of chippings or promenade tiles will be provided.IKO Challenger 180 Poly Sand 20mSKU: 50170000£61.32PriceSales Tax IncludedQuantity*Add to CartTechnical InfoRoll Weight 40kg; Length 20m; Width 1m Traditional pour & roll application Sand surface finish Tough 180g/m2 polyester base APP bitumen coating Manufactured to BS 8747 10 year materials guarantee Technical information available here