Ditra 25 is a polyethylene membrane with a grid structure of square cavities, each cut back in a dovetail configuration and an anchoring fleece laminated to its underside

Designed for tile and natural stone installations

The substrate must be even and load bearing

To bond Ditra 25 use a bonding adhesive that is appropriate for the substrate.  Apply the adhesive using a 3 x 3 mm or 4 x 4 mm notched trowel. The anchoring fleece on the underside must be fully engaged in the adhesive to provide a mechanical bond to the substrate. Please observe the open time of the bonding adhesive

Using the thin-bed method and following all applicable industry standards, set the tile or stone covering directly on the matting in such a way that the tile adhesive becomes mechanically anchored in the square, cut back cavities

Use for:

Uncoupling
Uncouples the floor covering from the substrate and neutralises the tensions between the substrate and the tile covering that result from the varying deformations of the materials. Likewise, stress cracks in the substrate are bridged and are, therefore, not transferred to the surface covering

Waterproofing
A waterproof polyethylene membrane with a relatively high vapour diffusion density. Provided the mat joints and the connections to walls and built-in elements are properly installed, Ditra 25 can be used to create a certified bonded waterproofing assembly with the tile covering

Equalisation of vapour pressure
The interconnected air channels between the cavities on the underside of the matting remain open. This allows moisture in the substrate to evaporate, therefore neutralising vapour pressure

Load distribution (load impact)
Tiles that are installed in floor coverings with Ditra 25 should have a minimum size of 50 x 50 mm and be at least 5.5 mm thick. The bottom of the square cavities, which are filled with thin-bed adhesive, directly transfer the load impact on the tile covering to the substrate. As a consequence, tile coverings installed on top of Ditra 25 are highly load resistant. If high traffic loads are expected i.e. industrial locations, the tiles selected for the installation must be of the corresponding thickness and pressure stability

Adhesive properties
Due to the bonding of the anchoring fleece into the thin-bed adhesive on the underside and the mechanical anchoring of the adhesive in the cut back cavities, Ditra 25 achieves a good adhesion of the tile covering to the substrate (laboratory test values: ~ 0.2N/mm²). Consequently, it can be used for wall and floor coverings. Anchor plugs may be used with wall coverings if necessary

Available in 30 x 1m roll