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Mapei Keraflex Maxi S1 Tile Adhesive – Pallet Deals and Bulk Buy – High Performance Polymer Modified Adhesive

Mapei

Mapei Keraflex Maxi S1 Tile Adhesive

High performance, deformable cementitious adhesive with extended open time and no vertical slip, for ceramic tiles with very low emission level of VOC. Especially suitable for the installation of large-size porcelain tiles and natural stone

High-performance, deformable cementitious adhesive with no vertical slip, extended open time, excellent workability and Low Dust technology for ceramic tiles, particularly recommended for bonding large porcelain and natural stone tiles (thickness of adhesive from 3 to 15 mm). With very emission of volatile organic compounds.

TECHNICAL DATA:

Pot life of mix: more than 8 hours.

Open time: 30 minutes.

Waiting time before grouting:
– on walls: 4-8 hours;
– on floors: 24 hours.

  • Set to foot traffic: approx. 24 hours.
  • Ready for service: approx. 14 days.
  • Deformability according to EN 12004: S1 – deformable.
  • Colour: grey and white.
  • Application: N° 4, 5, 6 or 10 notched spreader.
  • EMICODE: EC1 R Plus – very low emission.
  • Storage: 12 months.
  • Consumption: 1.2 kg/m² per mm of thickness.
  • Packaging: 20 kg bags.

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Mapei Keraflex Maxi S1 Adhesive extended information

Where to use

  • Interior and exterior bonding, up to 15 mm bed depth, of ceramic tiles (single and double fired tiles, porcelain tiles, klinker, terracotta, etc.) on uneven substrates and renders, without having to level beforehand.
  • Interior and exterior bonding of stone materials (provided that they are not sensitive to moisture).
  • Spot bonding of insulating material such as expanded polystyrene, rock and glass wool, Eraclit® (wood-cement panels),
    sound-deadening panels, cork, etc.

Some application examples

Bonding ceramic tiles (double-fired, single-fired, porcelain tiles, klinker etc.) and stone materials (provided that they are not sensitive to moisture) on conventional substrates such as:

– cementitious screeds and underfloor heating installations;
– cementitious renders or lime and cement- based mortar;
– gypsum board as long as firmly fixed;
– tilling to timber where it’s screw fixed and rigid.

  • Ceramic and natural stone tiles on existing flooring (ceramic, marble, etc.).
  • Installation of floors subjected to heavy traffic.
  • Installation of floor and wall coverings on substrates waterproofed with Mapelastic.
  • Interior and exterior bonding of tiles or strips (porcelain tiles, klinker, single-fired, terracotta) with highly profiled ribs or lugs.

Mapei Keraflex S1 Technical Characteristics

Mapei Keraflex Maxi S1 is a grey or white powder composed of cement and fine graded sands. It contains high levels of synthetic resins and special additives and has been developed in MAPEl’s Research and Development Laboratories.
A mortar with the following features is obtained when mixed with water:

  • Low viscosity, therefore easily workable.
  • Highly thixotropic: Keraflex Maxi S1 can be applied on a vertical surface without sagging or even with large or heavy tiles.
  • Accommodates irregularities in substrate and tile.
  • Perfect adherence to all materials normally used in building.
  • Hardens, even when very thickly applied, with minimal shrinkage.
  • Extended open and adjustability time.

Recommendations

Do not use Mapei Keraflex Maxi S1 in the following cases:

  • on wood and wooden conglomerates;
  • on metal, rubber, PVC and linoleum surfaces:
  • with marble and natural stone slabs subject to efflorescence or stains;
  • with natural or artificial stone material slabs subject to movement due to moisture;
  • on precast concrete or subject to strong movement;
  • When surfaces need to be ready for traffic in a short time.

Mapei Keraflex S1 application procedure

Preparing the substrate

All substrates receiving Keraflex Maxi S1 must be cured, mechanically resistant, sound, clean, free of cracks, loose parts,  oil, grease, wax and dust and sufficiently dry.

Cementitious substrates should not be subject to shrinkage after the installation of ceramic tiles, therefore during spring and summer, renders must cure at least 2 weeks for each cm of thickness and cementitious screeds must have an overall cure time of at east 3 weeks, unless they are produced with special binders for MAPEl screeds such as Mapecem, Mapecem Pronto. Mapei Topcem or Topcem Pronto. Dampen with water to cool surfaces heated from exposure to sunlight. Gypsum substrates and anhydrite screeds must be perfectly dry, sufficiently hard and free from dust. It is essential that they be treated with Eco Prim Tor Mapeprim SP.

Preparing the mix

Mix Keraflex Maxi S1 with clean water until a smooth, lump-free paste is obtained. Leave to rest approximately 5 minutes and re-stir.
White use 5.2-5.6 litres of water for every 20 kg of powder. Grey use 5.0-5.4 litres of water for every 20 kg of powder.
Mixed this way, Mapei Keraflex Maxi S1 has a pot life of approximately 8 hours.

Applying the mix

Keraflex Maxi S1 is applied to the substrate using a notched trowel. Choose a trowel that gives a complete coverage to the backs of the tiles.
To achieve good adhesion, spread a thin laver of Keraflex Maxi S1 on the substrate using the straiaht edge of the trowel.
Immediately after, apply the desired thickness of Keraflex Maxi S1 using a suitable notched trowel, depending on the type and size of the tiles.
For outdoor ceramic tilina, sizes areater than 300×300 mm. floors must be subject to heavy loads. or when apolving in swimming pools and basins filled with water, spread the adhesive on the back of the tile (back-buttering) in order to ensure a complete coverage.

Installing the tiles

There is no need to wet the tiles before installing. Only with very dusty backs is it recommended to dip the tiles in clean water. Dry tiles before fixing.
Tiles should be installed with firm pressure to ensure good coverage of the adhesive. In normal temperature and humidity conditions, the open time of Keraflex Maxi S1 is at least 30 minutes. Unfavourable weather conditions (strong sun, drying wind, high temperatures, etc.) or a highly absorbent substrate can reduce the open time, even to just a few minutes.

Careful checks must be made to ensure that a skin does not form on the surface of the spread adhesive. If not, re-freshen the adhesive by re-spreading with a notched trowel. It is not recommended to wet the adhesive with water once a skin has formed because the water will form an anti-adhesive film.

If necessary, tiles should be adjusted within 60 minutes of installation. Tiling installed with Keraflex Maxi $1 must not be washed or exposed to rain for at least 24 hours and must be protected from frost and strong sun for at least 5-7 days.

Spot-bonding insulating materials

For spot-bonding sound-deadening or insulating panels, apply Mapei Keraflex Maxi S1 with a trowel or a float, at a thickness determined by the surface levels and by the weight of the panels.

Grouting and Sealing

Wall joints can be grouted after 4-8 hours and floor joints can be grouted after 24 hours with the relevant MAPEI cementitious or epoxy grouts, available in different colours.
Expansion joints must be sealed with the relevant MAPEl sealants.

Set to light foot traffic

Floors are able to take light foot traffic after approx. 24 hours.

Ready for use

Surfaces are ready for use after approximately 14 davs.

Cleaning

Tools and containers should be cleaned with plentv of water while Keraflex Maxi S1 is still fresh. Surfaces should be cleaned
with a damp cloth, before the adhesive dries.

Consumption

Bonding ceramic tiles
– 1.2 kg/m2 per mm of thickness.
Bonding panels
– Applied with a trowel approx. (rounded notch): 6-7 kg/m?
– Spot-bonding (with a trowel): 4-6 kg/m2

Packaging

Keraflex Maxi S1 is available in 20 kg paper bags.

Mapei Keraflex Maxi S1 product identity

Type:powder
Colour:grey, white
Bulk mass density (kg/m3):1400
Dry solids content (%):100
EMICODE:EC1 R Plus - very low emission

Mapei Keraflex Maxi S1 application data

Mixing ratio:100 parts Keraflex Maxi S1 grey with 25-27 parts water by weight

100 parts Keraflex Maxi S1 white with 26-28 parts water by
weight
Consistency of mix:creamy paste
Mass density of the mix (kg/m3):1500
pH of mix:over 12
Pot life:over 8 hours
Application temperature:from +5°C to +35°C
Open time (according to EN 1346):> 30 minutes
Adjustability time:approx. 60 minutes
Ready for grouting on walls:after 4-8 hours
Ready for grouting on floors:after 24 hours
Set to light foot traffic:24 hours
Ready for use:14 days

Mapei Keraflex Maxi S1 final performances

Tensile adhesion strength in compliance with EN 1348
(N/mm2):
- initial tensile adhesion strength (after 28 days):
- tensile adhesion strength after heat ageing:
- tensile adhesion strength after water immersion:
- tensile adhesion strength after freeze/thaw cycles:

3.0
25
11
1.5
Resistance to alkali:excellent
Resistance to oils:excellent (poor to vegetable oils)
Resistance to solvents:excellent
Temperature when in use:from -30°C to +90°C
Deformability according to EN 12004:S1 - deformable
Brands

Units

20Kg bags

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