View basket “20mm Ballast Mini Bag” has been added to your basket. £53.40 4m X 25m DPM, 300mu quantity Add to basket Category: Building Materials Description Description Damp-proof membrane (DPM) is a versatile product and can also be used for a wide range of applications; but commonly used to protect a building’s concrete slab from moisture rising from the foundations. Related products 20mm Ballast Bulk Bag £42.00 Add to basket Bond-It Powdered Cement Dye, 1kg £6.95 Select options 20mm Stone Mini Bag £3.50 Read more 300mm X 30m DPC £12.60 Add to basket