Schlüter-DITRA-DRAIN is a safe and permanently effective passive capillary drainage system for floor assemblies. The material is installed in exterior areas into thin bed adhesive over a sloped waterproofing assembly, such as Schlüter-KERDI or other suitable proprietary waterproofing systems.

Schlüter-DITRA-DRAIN 4 consists of a closed polyethylene foil that on one side features approx. 4 mm high, truncated conical studs with a laminated filter webbing. Some of these studs are shaped as approximately 2 mm high inverted truncated pyramids, which form square undercut chambers on the underside.

These facilitate the bonding of the thin bed mortar, which is applied with a notched 6 mm x 6 mm trowel on the bonded waterproofing assembly for fully embedding Schlüter-DITRA-DRAIN. The closely adjoining studs in the form of truncated cones are able to absorb high compressive forces (up to approx. 50 t/m2). The undercut design of the truncated pyramid studs allows for excellent bonding with the substrate. Schlüter-DITRA-DRAIN 4 is particularly suited for interior areas and small exterior areas.