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APPLICATION AND FUNCTION

Schlüter-KERDI is a crack bridging waterproof membrane made of soft polyethylene, which has been covered on both sides with a special fleece webbing to anchor the membrane in suitable tile adhesive. Schlüter-KERDI has been developed for bonded waterproofing assemblies with coverings of tiles and pavers.

The waterproofing membrane should be bonded to an even, load bearing substrate with an appropriate tile adhesive. The tiles are laid directly on Schlüter-KERDI using the thinbed method. Other trowel applied covering materials or plaster may also be applied. Schlüter-KERDI-DS is a waterproofing membrane and vapour barrier bonded to a tile covering, e.g. for use in swimming pools and spa areas, as well as for commercial applications with high humidity levels. Vapour barriers also make sense for moisturesensitive substrates such as wood, plasterboard and gypsum plaster.

Accessories for Schlüter-KERDI include inside and outside corners, as well as pipe collars. To seal butt joints or corner joints, Schlüter-KERDI-BAND, in widths of 8.5, 12.5, 15, 18.5, 25 cm is available. Schlüter-KERDI-FLEX, in widths of 12.5 cm or 25 cm, is used to seal over expansion joints or flexible edge joints.

INSTALLATION

1. The substrate must be free of bond inhibiting components, 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. Note: System tested thin-bed mortar 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 notched trowel (recommended size: 3 x 3 mm or 4 mm x 4 mm).
4. Individual strips 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. Joints can be constructed by overlapping the edges of the Schlüter-KERDI matting at least 5 cm or by abutting the edges and covering the joint with Schlüter-KERDI-BAND, which is solidly embedded in the sealing adhesive Schlüter-KERDI-COLL.
6. Use the pre-fabricated Schlüter-KERDI corners for inside and outside corners. Schlüter-KERDI-BAND can also be used in floor/wall connections. The product Schlüter-KERDI-KM (pipe collar) is specially designed for pipe protrusions. Connections to construction fixtures are easy to establish with Schlüter-KERDI as well. Depending on the construction
   situation, Schlüter-KERDI-FIX can be used to adhere Schlüter-KERDI, -KERDI-BAND, or -KERDI-FLEX to construction fixtures for creating a bonded waterproofing seal.
7. Clamp or tightly adhere a 50 cm x 50 cm patch 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. Note on floor drains: Schlüter-KERDIDRAIN 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.
8. Cut Schlüter-KERDI above structural and seismic expansion joints; then cover the joint with Schlüter-KERDI-FLEX. Schlüter-KERDI-FLEX can also be used for flexible finishing edges. Alternatively, Schlüter-KERDI-BAND may be used, provided a loose fold is left above the joint.
9. The covering can be installed as soon as the entire waterproofing assembly is tightly sealed at all overlaps, corners, and joints. No waiting is required.
10. For the installation of tile, apply drysetting thin-bed mortar directly over Schlüter-KERDI and fully embed the tiles in the adhesive. Suitable reactive resin adhesives and grout mortars must be used for coverings that are likely to be exposed to chemicals. Note: System tested thin-bed mortar 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. Do not attempt to peel Schlüter-KERDI from the bonding adhesive as this will compromise the mechanical bond.

Installation sequence.

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