One component, highly flexible, high performance, quick-setting and hydrating cementitious adhesive, which is easy to trowel with no vertical slip and an extremely high yield, for ceramic tiles and stone material

WHERE TO USE

• Bonding of all types (double-fired, single-fired, porcelain, klinker, etc.) and sizes of ceramic tiles on internal and external surfaces.
• Bonding of natural stone, which is not sensitive to moisture, to interior or exterior. Some application examples
• Bonding of ceramic tiles (double-fired, single-fired, porcelain, klinker, etc.) and stone material (if not particularly sensitive to humidity) on traditional substrates such as:
  - cementitious and anhydrite screeds;
  - heated screeds;
  - cementitious render or lime-mortar render;
  - plasterboard, pre-fabricated and cement-fibre panels.
• Laying on flexible substrates or substrates subject to vibration: marine plywood, wooden agglomerates (if sufficiently stable in the presence of water), old wooden floors, etc.
• Quick refurbishment work where immediate installation is required (public buildings, transport cafes, supermarkets, airports and pedestrian areas).
• Laying ceramic and stone material on façades, balconies, terraces and slab floors exposed to direct sunlight and temperature gradients.
• Laying on pre-fabricated concrete walls and concrete substrates.
• Laying in environments (such as hospital entrance halls, school corridors, public buildings, etc.) where impact noise caused by footsteps needs to be reduced, especially if used in conjunction with the Mapefonic System.
• Laying ceramic and stone material directly on top of old floors (in ceramic, marble, etc.).
• Laying floors and coatings on MAPEI waterproofing and anti-fracture membranes.

TECHNICAL CHARACTERISTICS
Ultraflex S2 Quick is a grey-coloured powder made up of a blend of special cements, graded sand, a high quantity of synthetic resins and micronised elastomers, according to a formula developed in MAPEI’s own Research Laboratories. When mixed with water, it forms a mortar with the following characteristics:

• The innovative Ultralite TechnologyTM provides a low density product which results in two key advantages:
  1) weight advantage: 15 kg of Ultraflex S2 Quick weighs less than traditional cementitious adhesives of the same volume. Easier handling and lower transport costs apply
  2) increased yield: yield is approximately 30% more compared with MAPEI's traditional cementitious adhesives;
• low viscosity and, therefore, good workability;
• highly thixotropic: Ultraflex S2 Quick may be applied on vertical surfaces without sagging and there is no risk of the tiles slipping. It is also possible to lay the tiles from the top working downwards and diagonally without using spacer pegs.
• excellent capacity for following deformation in the substrate and tiles;
• bonds perfectly to all materials normally used in the building industry. Ultraflex S2 Quick develops high bonding strength after only 2 to 3 hours at +23°C (after 8 hours at +10°C); therefore, floors finishes laid using this product may be used after a very short period of time.

RECOMMENDATIONS
Do not use Ultraflex S2 Quick in the following cases:

• on metallic, rubber, PVC or linoleum surfaces;
• with marble or artificial composite material subject to considerable movement in the presence of humidity. Do not embed electric radiating heating elements in the layer of adhesive. Do not add more water to the mix once it has started to set.

APPLICATION PROCEDURE
Preparing the substrates
The substrates must be mechanically strong, dry and free from crumbling parts, grease, oil, paint and wax. Generally, cementitious substrates used for laying ceramic must not be subject to shrinkage once the tiles have been laid. Since Ultraflex S2 Quick is particularly flexible, however, it is also able to compensate for micro-cracks which form in the substrate if it is not sufficiently cured. Gypsum substrates and anhydrite screeds must be perfectly dry, sufficiently hard, free from dust and, in all cases, treated with Primer G or Mapeprim SP. Areas which are subject to high humidity must be treated with Primer S.