weber.xerm 866 F

Colour:
light grey

Bed thickness:
3 mm - 30 mm

Water demand:
as thick-bed mortar, approx. 5.5 liters / 20 kg
as thin-bed mortar, approx. 6.8 liters / 20 kg

Storage:
The product can be stored for at least 6 months in its original unopened packaging if kept dry and protected from moisture.

Fields of application

weber.xerm 866 F is dedicated to the discoloration-free fixing of calibrated and uncalibrated natural stone slabs (granite, porphyry, limestone, travertine, sandstone, quartzite, marble, etc.) as well as terracotta, stoneware and porcelain stoneware indoors and outdoors.
Also for laying natural stone window sills.
The following floor substrates are allowed: cement and calcium sulphate screeds (heated and nonheated) and also mastic asphalt screeds (indoors). The product combines the properties of a thin-, medium-bed or thick-bed adhesive.
It stands out by a relatively quick hardening with high crystalline water retention, even at low temperatures.
It is therefore also suitable for laying materials that are sensitive to moisture and discoloration.
Furthermore, suitable for levelling substrates in a thickness of up to 30 mm on small-size areas.
For use indoors and outdoors.

Main features

• class C1 FTE: C1: pull-off strength ≥ 0.5 N/mm2 after all tested storage conditions – F: fast-setting – T: thixotropic, slip ≤ 0.5 mm – E: extended open time ≥ 30 minutes
• can be applied as thin-, medium- or thick-bed adhesive
• for layer thickness from 3 mm up to 30 mm
• quick-setting
• high crystalline water retention
• very low shrinkage during setting
• suitable for moisture (discoloration)-sensitive natural stone slabs

General notes

• Limits of use: do not use weber.xerm 866 F outdoors and in areas permanently underwater; in these cases, use the epoxy resin adhesive weber.xerm 847.
• For laying bright, highly translucent and calibrated natural stone slabs, we recommend the quick-setting and flexible natural stone adhesive weber.xerm 864 F.
• 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 (Centra l Association of German Constructio n 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.
• Respect the maximum residual content of 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% 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.
• Tiling materials that are particularly sensitive to discolouration and deformation must be fixed with a water-free adhesive (e.g. reactive resin adhesive). If in doubt, carry out preliminary tests.
• Do not install tiles, slabs or natural stones that have been stored damp, wet, or too cold.
• Check the compatibility of the tile adhesive with natural stones on a trial area.
• 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.), calcium sulphate screeds or mastic asphalt screeds, the maximum adhesive bed thickness must not exceed 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.
• When applied on mastic asphalt screeds, their hardness must correspond to the class IC 10 (indentation on cubes) or ICH 10 (indentation on screed) according to EN 13813. The maximum layer thickness of weber.xerm 864 F is 15 mm.