タイトルまたは説明

Is a single layer of plain woven Hessian cloth fully saturated with soft bitumen and coated on both sides with oxidized bitumen which is stabilized with finely divided mineral filler, and surfaced with fine sand.
For use as lower layer or layers in waterproofing for solid floor construction, foundations, bridge decks, roofs, wet areas, and for many other purposes where high strength is required .