SPETEC® WT400 is a single component hydrophilic caulk designedto swell and/or expand in the presence of water creating a watertight seal around pipe penetrations, cold joints and other waterstoplocations. SPETEC® WT400 should be applied onto a dust free, oilfree surface to maximize bond strength. SPETEC® WT400 should beapplied at a minimum bead of 10mm with a minimum concrete coverof 7cm. SPETEC® WT400 must be fully confined to properly expandand seal the surface. This material can be applied underwater onclean surfaces.