Schlüter-KERDI is a crack bridging waterproofing membrane made of soft polyethylene, with a special fleece fabric on both sides for effective anchoring in the tile adhesive.
Schlüter-KERDI was developed as a waterproofing membrane for bonded assemblies with floor and wall coverings made of tiles and natural stone.

The waterproofing membrane is adhered to a level substrate with a suitable tile adhesive. The tiles are installed directly over Schlüter-KERDI, using the thin-bed method. Other trowel applied cover materials or plaster can also be installed.

Installation of Schlüter®-KERDI

1. The substrate must be free of bond inhibiting components, be load bearing and even. Any unevenness in the substrate must be levelled prior to the application of Schlüter-KERDI.
2. The type of bonding adhesive used to apply Schlüter-KERDI depends on the type of substrate. The adhesive must bond to the substrate and mechanically anchor the fleece on the underside of the Schlüter-KERDI matting. Verify the compatibility of all materials prior to installation.
   If using covering materials with a lateral length ≥ 30 cm, we recommend a water-binding tile adhesive for rapid curing and drying.
   Note: System tested adhesive must be used in areas that require special approval of the authorities. Please contact us at the address shown in this data sheet for more details.
3. Apply the bonding adhesive to the substrate using a 3 x 3 mm or 4 x 4 mm notched trowel.
4. Individual courses of Schlüter-KERDI are cut to size. Solidly embed the anchoring fleece on the underside in the adhesive so that its entire surface is bonded. Work the material into the adhesive with the smooth side of a notched trowel or a float, exerting pressure on the Schlüter KERDI matting in diagonal strokes.
   Avoid the formation of air bubbles and observe the open time of the bonding adhesive.
5. Overlap the joints of the KERDI membranes by at least 5 cm or abut the joints and fully cover the joint with Schlüter-KERDI-KEBA, using the sealing adhesive Schlüter-KERDI-COLL-L.
6. Use the pre-fabricated KERDI corners for internal and external corners.
   Schlüter-KERDI-KEBA must be adhered to corner joints in the same manner. Use Schlüter-KERDI-KM (pipe collar) for pipe penetrations. Functional connections to fixed structural components can be created as well. Depending on the situation of the construction site, Schlüter-KERDI,-KERDI-KEBA or -KERDI-FLEX can be attached to the adjoining structural element with Schlüter-KERDI-FIX to create a waterproof connection (see Product Data Sheet 8.3, Schlüter-KERDI-FIX).
   6a. Adhere KERDI-KM or KERDI-MV (pipe collars) around pipe penetrations. As an alternative, our KERDI-PAS sets comprise a plastic sleeve and a KERDI-MV collar. The collar is adhered around the pipe protrusion together with the plastic sleeve to ensure reliable waterproofing of the subsequently installed internally threaded tap extension after removing the plastic sleeve.
7. Clamp or tightly adhere a 50 cm x 50 cm piece of Schlüter-KERDI onto the flange of the floor drains constructed in the thin-bed method as a connector collar. Then bring the Schlüter-KERDI mat within 10 cm of the floor drain and adhere it to the connector collar without leaving air pockets. Schlüter-KERDI-DRAIN is a floor drain specifically designed to allow connections to a bonded waterproofing membrane. This allows the simple and fast connection of Schlüter-KERDI to the floor drain, using the Schlüter-KERDI collar.

For further information see data sheets and installation video.