weber.xerm 862

Colour:
white

Bed thickness:
up to 20 mm

Water demand:
approx. 5.8 liters / 25 kg

Storage:
The product can be stored for at least 12 months in its original unopened packaging if kept dry and protected from moisture.

Fields of application

weber.xerm 862 is used for laying calibrated and uncalibrated natural and artificial stones which are not sensitive to moisture/ discoloration, indoors and outdoors.
Following substrates are allowed: e.g. cement and calcium sulphate screeds (heated and nonheated), concrete, aerated concrete, dry screeds, gypsum plasterboards, gypsum paperboards and gypsum fiberboards.
Can also be applied to the following Weber waterproofing compounds as bonded systems: weber. tec 824 (1-comp. cement-based normal-setting), weber.xerm 844 or weber.tec Superflex D 2 (2-comp. quick-setting and reactive compounds).
Furthermore, for use on the drainage mortar weber.xerm 869.
The trass content offers increased protection against lime efflorescence in case of wet exposure when used on exterior and on interior surfaces.
For use indoors and outdoors.

Main features

• class C2 TE: C2: pull-off strength ≥ 1.0 N/mm2 after all storage conditions – T: thixotropic, slip ≤ 0.5 mm – E: extended open time ≥ 30 minutes
• can be applied as medium-bed adhesive
• for layer thickness from 5 mm up to 20 mm
• reduced risk of lime efflorescence thanks to trass content
• on the basis of white cement
• high slip resistance
• high bonding strength
• suitable for heated floor constructions
• for walls and floors

General notes

• Limits of use: do not use weber.xerm 862 for bonding “tile on tile” outdoors, in permanently wet 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%.
• Comply with the national standards and/or guidelines, for ex. DIN 18157 “Execution of tilings and coverings by thin-bed method with cement-based mortars” and the leaflets of ZDB (Central Association of the 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 broadcasted with silica sand, etc. Request technical advice.
• For installation of natural or artificial stone slabs follow the supplier’s recommendations. If in doubt, carry out preliminary tests.
• 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 non-heated anhydrite screeds, 1.0% in case of gypsum plasters, and air-dry for cement and cement-lime plasters. The moisture content must be measured with a carbide hygrometer (CM) as a rule.
• Check the compatibility of the tile adhesive with natural stones on a trial area.
• 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 lower compressive strengths and raw densities (e.g. gypsum plasters, lightweight plasters, aerated concrete etc.) or calcium sulphate screeds, apply the tile adhesive in a maximum thickness of 3 mm.