weber.xerm 853 F

Colour:
grey

Bed thickness:
up to 10 mm

Water demand:
approx. 6.25 liters / 25 kg

Storage:
The product can be stored for at least 9 months in its original unopened packaging if kept dry and protected from moisture.

Fields of application

weber.xerm 853 F is used for laying wall and floor ceramic tiles, non-moisture (discoloration)-sensitive natural stones, mosaics, stoneware brick slips, earthenware, split tiles, hand-moulded stones, brick tiles, lightweight boards, fiberglass boards and rigid foam boards, by using the thin- or medium-bed method.
The following substrates are allowed: concrete, cement and anhydrite screeds (heated and nonheated), plasters/renders, masonries, clinker, lightweight multi-use tilebackers weber.sys 834, gypsum fiberboards, gypsum plasterboards, gypsum paperboards and aerated concrete.
Dedicated for installation works under time pressure, e.g. in showrooms and salesrooms, counter halls, entrance halls, hallways, balconies and terraces.
For use indoors and outdoors.

Main features

• EMICODE EC 1^PLUS: very low emission of volatile substances
• class C1 FTE: C1 = pull-off strength ≥ 0.5 N/mm2 after all storage conditions – F: quick-setting – T = thixotropic, slip ≤ 0.5 mm – E = extended open time ≥ 30 minutes
• quick-setting
• can be applied as thin- or medium-bed adhesive
• high slip resistance
• quickly open to foot traffic and for grouting works
• for wet-duty and permanently underwater areas
• suitable for heated floor constructions
• for use indoors and outdoors

General notes

• Limits of use: do not use weber.xerm 853 F 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.
• Do not use mastic asphalt screeds.
• 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 drying 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.
• For installation of natural or artificial stone slabs, follow 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.
• Tiling materials that are particularly sensitive to discolouration and deformation must be fixed with a water-free adhesive (e.g. reaction resin adhesive). 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 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 plaster, lightweight plasters, aerated concrete, etc.), calcium sulphate screeds and mastic asphalt screeds, apply the tile adhesive in a thickness of max. 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.