weber.xerm 852

Colour:
grey

Bed thickness:
up to 10 mm

Water demand:
approx. 8 liters / 25 kg

Storage:
The product can be stored for at least 15 months in its original unopened packaging if kept dry and protected from moisture.

Fields of application

weber.xerm 852 is used for fixing floor and wall ceramic tiles indoors and in specific areas outdoors, as well as non-moisture (discoloration)-sensitive natural stone tiles, mosaic, porcelain stoneware and artificial stones (for ex. terrazzo).
The trass content offers increased protection against lime efflorescence due to damp exposure indoors and outdoors as well when laying natural tiles or slabs.
Can be used as thin-bed and medium-bed adhesive in damp, wet-duty and cold storage rooms and also in underwater areas.
The following substrates are allowed: concrete, cement and anhydrite screeds (heated and nonheated), mastic asphalt (indoors), gypsum paperboards, gypsum fiberboards, cement and limecement plasters/renders, gypsum plasters, rigid foam boards and lightweight multi-use tilebackers weber.sys 834.
The particular features of weber.xerm 852 are its very good slip resistance and its creamy consistency at the same time.
Furthermore, its extended open time allows quick and rational tiling works with high demands for bonding performance.
For use indoors and partially outdoors.

Main features

• EMICODE EC 1: low emission of volatile substances
• class C2 TE / S1: C2: pull-off strength ≥ 1.0 N/mm2 in all storage conditions – T: thixotropic, slip ≤ 0.5 mm – E: extended open time ≥ 30 minutes – S1: deformation ≥ 2.5 mm
• contains trass
• high stability on walls
• can be applied as a thin- or medium-bed adhesive
• for walls and floors
• fulfills the KSW recommendations for swimming pools (Germany)
• convenient for tile fixing on heated floor constructions
• for levelling unevenness and defects up to 10 mm thickness

General notes

• Limits of use: do not use weber.xerm 852 for bonding “tile on tile” outdoors, in permanently wet-duty areas and in areas permanently underwater (without waterproofing); in these cases, use the epoxy resin adhesive weber.xerm 847.
• Neither use for bonding the impact sound insulation and de-coupling boards weber.sys 830 and sys 832 on the floor, nor for fixing tiles, slabs and natural stones on top.
• For full information relating to allowed substrates and tile coverings, refer to the Weber chart “Overview Tile Adhesives”.
• All characteristics mentioned in this data sheet are based on a temperature of +23 °C without draught and a relative humidity rate of 50%.
• Higher temperatures and lower humidity rates accelerate, lower temperatures and higher humidity rates delay the setting process.
• Comply with the national standards and/or guidelines, for ex. DIN 18157 “Execution of tilings and coverings” and the leaflets of ZDB (Central Association of German Construction Industry); if not issued and if necessary, request technical advice.
• Take preliminary measures before fixing coverings on wooden (timber planks) or metal substrates, for ex. with de-coupling boards combined with a self-levelling mortar or an epoxy resin covered with silica sand, etc. Request technical advice.
• For installation of natural or artificial stone slabs comply with the supplier’s recommendations. If in doubt, carry out preliminary tests.
• Check the compatibility of the tile adhesive with natural stones on a trial area.
• Respect the maximum residual moisture content of the substrate at the time of installation of ceramic coverings and natural stones; it should not exceed 2.0 CM-% (by weight) in case of heated or non-heated cement screeds, 0.5 CM-% (by weight) in case of heated or nonheated anhydrite screeds, 1.0 CM-% (by weight) in case of gypsum plasters, and air-dry for cement and cement-lime renders/plasters. The moisture content must be measured with a carbide hygrometer (CM) as a rule.
• Do not install tiles, slabs or natural stones that have been stored damp, wet, or too cold.
• Protect the structure from moisture until the tile adhesive has completely set.
• Do not use a material that has already stiffened.

Special notes

• When levelling substrates with low compressive strength and bulk density (e.g. gypsum plasters, lightweight plasters, aerated concrete, etc.), calcium sulphate screeds or mastic asphalt screeds, apply the tile adhesive in a thickness of a maximum of 3 mm.
• Do not use in contact with non-ferrous metals, such as aluminium, copper, lead or zinc. Used stainless steel components, e.g. rails and edge protector angles.