weber.xerm 864 F

Colour:
white

Bed thickness:
up to 10 mm

Water demand:
approx. 6.75 liters / 25 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 864 F is used for laying natural stones and artificial stones that are not sensitive to moisture (discoloration), as well as floor and wall ceramic tiles, like porcelain stoneware, earthenware, glass mosaic, split tiles and also rigid foam boards, using the thin-bed or medium-bed method.
The following substrates are allowed: concrete, cement and cement-lime plasters, cement and calcium sulphate screeds (heated and non-heated), mastic asphalt (indoors), masonries, clinker, lightweight multi-use tilebackers weber.sys 834, gypsum fiberboards, gypsum plasterboards, gypsum paperboards and aerated cellular concrete.
Mainly used for tiling works to be performed under time pressure, such as showrooms and salesrooms, counter halls, entrance halls, hallways, etc.
Furthermore, suitable for critical substrates with moderate vibrations and tensions, for ex. lightweight walls and heated screeds.
For use indoors.

Main features

• class C2 FTE / S1: C2: pull-off strength ≥ 1.0 N/mm2 in all tested storage conditions – F: quick-setting – T: thixotropic, slip ≤ 0.5 mm – E: extended open time ≥ 30 minutes – S1: deformation ≥ 2.5 mm
• can be applied as thin- and medium-bed adhesive
• with high crystalline water retention
• quick drying
• quickly open to pedestrian traffic and for grouting works
• suitable for moisture (discoloration)-sensitive natural stones

General notes

• Limits of use: do not use weber.xerm 864 F 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.
• 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 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 covered 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 substrate moisture 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 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.
• For the installation of glass tiles and glass mosaic, follow the supplier’s recommendations. Discolouration cannot be ruled out, even in the case of accurate application.
• 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 low compressive strength and bulk density (e.g. gypsum plasters, lightweight plasters, aerated concrete, etc.), calcium sulphate screeds and mastic asphalt screeds, apply the tile adhesive in a maximal thickness 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.