Schlüter®-KERDI

Application and function

Schlüter-KERDI is a waterproofing sheath in soft polyethylene, with “crack bridging” capacity, provided on both sides with a special felted fabric which guarantees grip with the adhesive.

The centimeter graphics make it easier to cut the KERDI sheath to size on site. The edge indicates the quantity of material left on the roll and the minimum recommended space for any overlapping of the sheets is highlighted, which is 5 cm.

The KERDI sheath was conceived as a waterproofing system to be installed directly under the ceramic or natural stone floor or wall covering. It complies with the German sealing standards DIN 18531, DIN 18534 and DIN 18535. Water exposure classes according to DIN 18534: W0-I to W3-I. Schlüter-KERDI also has a general building inspection certificate (abP). The uses granted according to the ZDB certification are 0 – B0 in addition to A, B and C.

The KERDI system has obtained the ETA (European Technical Assessment) certification in accordance with ETAG 022 (waterproofing in combination with other materials) with assignment of the CE mark.

For information on other fields of application, our technical office.

The sheath must be glued directly onto a planar support with an adhesive suitable for the same. Subsequently, the ceramic coating is laid on the KERDI sheath with an adhesive suitable for the coating itself. It is also possible to lay other roofing materials on the sheath, such as natural stones, trowellable materials or plaster (subject to suitability assessment).

Schlüter-KERDI-DS is a waterproofing membrane which also acts as a vapor barrier under ceramic coverings. Suitable for areas where there is a high concentration of humidity such as swimming pools and spas and industrial environments with a high concentration of humidity in the air. The creation of a vapor barrier can also be indicated in the presence of substrates sensitive to humidity such as in the case of wood, plasterboard and gypsum-based plasters.

To complete the KERDI waterproofing system, special pieces are available such as: internal corners, external corners and sealing dowels Schlüter-KERDI-KM or -KERDI-MV. Schlüter-KERDI-PAS sets consisting of sealing plug KERDI MV and a special plastic sleeve for the assembly phase. For sealing seams or joints, the highly elastic sealing strip Schlüter-KERDI-KEBA is available in widths of 8.5/12.5/15/18.5/25 cm.

To guarantee waterproofing in the vicinity of perimeter and fractionation joints subject to expansion during operation, it is advisable to use the highly elastic Schlüter-KERDI-FLEX band, available in widths of 12.5 cm or 25 cm.