Mapei Adesilex P4 is a high-performance, self-buttering, quick-setting grey cementitious adhesive for ceramic tiles and stone material.
N.B. May also be used for smoothing internal and external surfaces.
TECHNICAL DATA:
- Where to use: Floors only.
- Pot life of mix: More than 60 minutes.
- Open time: 20 minutes.
- Waiting time before grouting: 4 hours.
- Set to light foot traffic: approx. 4 hours.
- Ready for use: approx. 24 hours.
- Colour: Grey.
Adesilex P4 is a cementitious (C) adhesive with improved (2) and fast setting (F) characteristics, classified as C2F.
WHERE TO USE
Floor bonding of all types of medium and large ceramic, porcelain tiles, natural stone (if not sensitive to moisture or subject to surface efflorescence), terracotta, and terrazzo tiles to interior and exterior floors.
Interior and exterior smoothing of all substrates generally used in building, provided they are clean, such as concrete slabs, cementitious screeds and existing ceramic tile, terazzo and natural stone floors.
Some application examples
· Solid-bed fixing of large size porcelain tiles on floors subject to heavy traffic, such as offices, shopping malls, hospitals and schools.
· Bonding of stone material and terrazzo, including large sizes.
· Bonding quarry tiles, klinker or single-fired tiles on terraces and balconies.
· Bonding ceramic tiles of every type over all kinds of underfloor heating installations.
· Overlaying of ceramic tiles and stone material on old floors (ceramic, natural stone, cement, terrazzo), as long as they are solid and perfectly clean.
· Easy levelling and localised smoothing with rapid curing prior to fixing ceramic tiles.
· Rapid replacement of tiles, when filling irregularities in the substrate is required simultaneously.
TECHNICAL CHARACTERISTICS
Adesilex P4 is a grey powder composed of cement and fine-graded mineral fillers, containing high quantities of synthetic resins and special additives according to a formula developed in the MAPEI Research Laboratories.
Mixed with water, Adesilex P4 becomes a mortar with the following properties:
· Semi-fluid and easily trowellable;
· 100% back-buttering is guaranteed. With Adesilex P4 it is possible to obtain adhesive beds 3 mm to 20 mm thick without undulations, ideal for external installations and heavy traffic areas;
· Able to accommodate deviations of the substrate and tiles;
· Perfect bonding to all materials generally used in building;
· Cures rapidly without significant shrinkage until it builds a sufficient bond strength;
· Water resistant, weatherproof and resistant to frost.
RECOMMENDATIONS
Do not use Adesilex P4:
· On walls or slanted surfaces;
· Wood and wood conglomerates;
· Metal surfaces, rubber, PVC or linoleum;
· With natural or artificial stone material slabs subject to movement due to moisture.
APPLICATION PROCEDURE FLOOR INSTALLATION
Preparation of the substrate
The substrate must be cured, mechanically strong, free of loose materials, grease, oils, paint, wax and sufficiently dry.
Cementitious substrates should not be subject to shrinkage after the installation of ceramic tiles. During spring and summer, the cementitious screeds must be cured for at least 28 days, unless they are not made with MAPEI special binders for screeds, such as Mapecem, Topcem or with Mapecem Pronto, Topcem Pronto. New concrete must be allowed to cure for a minimum of 6 weeks.
Dampen with water to cool the surfaces that have been heated by the exposure to sunlight. Gypsum substrates and anhydrite screeds must be perfectly clean, sufficiently hard and free of dust. It is absolutely essential to treat them with Primer G or Eco Prim T Plus.
Preparing the mix
Mix Adesilex P4 in a clean receptacle with 3.8-4.2 litres of clean water for every 20kg bag until a smooth lump-free paste is obtained. Let the mix sit for 3 minutes, then stir again and the mix is ready for use. Mixed this way Adesilex P4 will have a pot life of approx. 60 minutes at +23°C and 50% R.H.
If both adhesive and tiles are very thick, or the tiles are particularly heavy, 20% of suitably graded clean sand may be added to prevent shrinkage or settling.
Applying the mix
Apply Adesilex P4 to the substrate with a suitable castellated or round notched trowel.
The selection of the correct trowel depends on the evenness of the substrate, the size of the tile and the profile of the back.
Installing the tiles
It is not necessary to wet the tiles before setting. Only when the backs are very dusty is it advisable to dip the tiles in clean water.
Set the tiles on the bed of Adesilex P4 without pressure but with a light twisting/sliding movement to ensure 100% coverage.
The open time of Adesilex P4 in normal temperatures and humidity is approx. 15 minutes. Unfavourable weather
conditions (strong sun, wind, high temperature) may shorten the open time, sometimes quite drastically, to just a few minutes.
For this reason, constant checks must be made to see if the adhesive has formed a surface skin or is still “fresh” to the touch.
Wetting the cementitious substrate before applying the adhesive helps to lengthen the open time. However if a surface skin has formed, retrowel the adhesive with a notched trowel.
It is not advisable to wet the adhesive once it has formed a skin because, instead of dissolving the skin, a non-adhesive film will be formed.
Any necessary adjustment of the tiles should be carried out within 30 minutes after setting.
Tiles set with Adesilex P4 must not be subject to washout or rain for 3 hours at a temperature of +23°C and must be protected from frost and hot sun for at least 24 hours after installing.
GROUTING AND MOVEMENT JOINTS
Joints between the tiles can be grouted after 4 hours with the specific MAPEI cementitious or epoxy grouts, available in different colours. Movement joints must be sealed with the specific MAPEI sealants.
SET TO LIGHT FOOT TRAFFIC
Floors are set to light foot traffic after approximately 4 hours.
READY FOR USE
The surfaces are ready for use after approx. 24 hours.
SMOOTHING
Preparing the substrate
Substrates must be level, solid, consistent and free of loose materials, grease, oils, paint, wax, etc, and sufficiently dry and cured. Anhydrite substrates must be thoroughly dry, sufficiently hard and free of dust (check for residual moisture) and must be previously treated with Primer G or Eco Prim T Plus.
Preparing the mix
Mix Adesilex P4 in a clean receptacle with 3.8-4.2 litres of clean water for every 20 kg bag until a smooth lump-free paste is obtained. Let the mix sit for 3 minutes, then stir again and the mix is ready for use. Mixed this way Adesilex P4 will have a pot life of approx. 60 minutes at +23°C and 50% R.H.
Applying the mix
Apply the mix with a suitable metal trowel. When needed, additional coats may be applied in rapid succession as soon as
the previous coat has hardened.
Installing the tiles
The surface can be tiled over as soon as it has hardened (3 to 4 hours, depending on the temperature and the absorbency
of the substrate).
CLEANING
Tools and hands may be cleaned with abundant water. Tiles may be cleaned with a damp sponge; only after a few hours
may a little water be used.
CONSUMPTION
Flooring installations
· Medium size tiles on smooth surfaces approx. 3-5 kg/m².
· Large tiles or uneven surfaces approx. 5-10 kg/ m².
Smoothing
Approx. 1.4 kg/m² for each mm of thickness.
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