The Voltex DS composite is comprised of two high strength geotextiles, 1.10-lbs. of sodium bentonite per square foot (the most bentonite in any commercially available waterproofing product), and an integrated polyethylene liner. The two geotextiles are interlocked by a patented needlepunching process which encapsulates and holds the granular bentonite in place and assures a consistent application of material. Voltex DS is ideal for waterproofing under slabs and property line applications. Under slabs, Voltex DS can be installed directly over a properly prepared substrate without the need of a concrete mud slab. Its durable composite construction resists damage from tradesman installing reinforcing steel over it. For property line applications, Voltex DS is simply installed against the retention wall and then the concrete is poured directly against it using a single sided form. Other applications include backfilled concrete foundation walls, shotcrete, and cut-and-cover tunnels.