Description
Benfer Benferflex S1 Tile Adhesive is a highly flexible, multi-purpose adhesive, applicable in thickness up to 20 mm, that can be used as flow bed adhesive. It is white in colour and supplied in 25kg bags.
The adhesive powder consists of cements, graded particle size aggregates, synthetic resins and special additives. Benfer Benferflex S1 Tile Adhesive has been formulated and developed for rapid, reliable installation of almost all ceramic materials, even on non-absorbent substrates and onto substrates subject to slight dimensional variation. The high resistance to vertical sliding allows you to tile from the top down. Thanks to its particular composition, Benfer Benferflex S1 Tile Adhesive can be mixed with a higher percentage of water to allow for complete “wetting” of the back of the tiles, even on large size formats, with no need for double buttering.
Benfer Benferflex S1 Tile Adhesive is highly resistant to lowering, with outstanding application properties such as long open time and low dust generation. It can be used internally and externally on walls and floors, for laying porcelain tiles, thin ceramic slabs, non absorbent single-fired tiles, double-fired tiles, natural stones (water stable), even large size, and glass mosaics.
Benfer Benferflex S1 Tile Adhesive can be used on the following substrates: Concrete, Cement-based screeds (standard and with wet UFH), Cement-based plaster, Flexible waterproofing membranes made up of cement and polymers, Cement based blocks. Internal use only: Fluid cement-based screeds (after application of an appropriate primer if demanded, standard or with wet UFH) Fluid anhydrite-based screeds (after application of an appropriate primer, standard or with wet UFH), Old ceramic tiles, Standard or waterproof plasterboard, Elastomeric waterproofing membranes, Cement-based and gypsum-based boards (after application of an appropriate primer).
Application:
Substrate preparation: The substrate must be solid, load-bearing, free from oil, grease and dust. Any paint-work must be in good condition, washed and degreased. If this is not the case, the paint must be carefully removed. Gypsum or calcium sulphate based substrates must be previously treated with BENFERPRIM. Absorbent substrates must be treated with BENFERPRIM.
Mixing: Mix Benfer Benferflex S1 Tile Adhesive in a clean mixing bucket with clean water until homogenous.
Mixing ratio: To attain a thixotropic consistency, mix 8.0 litres of water with each 25kg bag of Benfer Benferflex S1. To attain a flow-bed adhesive consistency, mix 9.5-10 litres of water with each 25kg bag of Benfer Benferflex S1. Allow to stand for 2 minutes, then re-mix. Do not mix more Benfer Benferflex S1 than can be used within the pot life.
Product Application: Benfer Benferflex S1 Tile Adhesive must be applied in a homogeneous and continuous layer, with a notched trowel, suitable for the tile format you have to use. INTERIOR: Lay the tiles while exerting a good pressure on the tiles surface, in order that the contact between tile and adhesive will be at least of 95-100%. EXTERIOR: The contact between tile and adhesive must be 100%, in order to avoid eventual rain infiltrations, that in case of frost could cause the detachment of the tiles. It is essential to leave a joint of at least 3 mm between each tile, and to ensure that the tiling conforms with the expansion joints of the structure, to be elastically sealed, as well as the joints between walls, and the joints between wall and floor. In any case, expansion joints and perimeter joints must be installed every 20m².
At 23°C and with 50% relative humidity, the open time is approximately 30 minutes. Under unfavourable conditions, these times may be significantly reduced. You are therefore advised to spread Benfer Benferflex S1 Tile Adhesive a little at a time and to check frequently that it has not formed a surface film before laying the tiles. To improve workability, especially in summer, it is useful to exclude draughts. In the first 48 hours after application, the adhesive does not withstand frost. Flooring installed using Benfer Benferflex S1 Tile Adhesive can be walked over cautiously after about 12 hours for grouting (48 hours for temperatures under 15°C). The adhesive will be fully cured after 7 days, depending on the formats, on the supports and on temperature of environment.
Consumption, notched trowel size:
4mm: 1.8 kg/m²
8mm: 3.5 kg/m²
10mm: 4-5 kg/m²
20mm: 8-10 kg/m²
Technical Data:
Classification EN 12004: C2TES1
Basis: Cement, aggregates, additives
Colour: Extra white
Apparent mass volume: 1,1 kg/m³
Maximum grain size: 0,3 mm
Storage and Duration: 12 months in the original closed package in a cool dry place
Danger of harm: No, Possible irritation of the eyes and skin upon contact
Flammability: No
Mixture ratio: 32%, 8 lt water/25 kg bag; 38-40%, 9,5-10 lt for 25 kg bag (flow bed)
Mixture consistency: Cream
Mass volume of paste: 1,7 kg/dm³
Application temperature: From + 5°C to + 35°C
Pot Life: About 3 hours at 23°C and 50% relative humidity
Open time: 30 minutes at 23°C and 50% relative humidity
Vertical slip according to EN1308: < 0,5mm
Maximum thickness: 20mm
Foot traffic: 12 hours at 23°C and 50% relative humidity
Grouting: 12 hours at 23°C and 50% relative humidity
Full service conditions after: 7 days at 23°C and 50% relative humidity
Final hardening: 28 days
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