Mapei Keraflex Maxi S1 Adhesive White

 
 
Keraflex Maxi S1 is a high performance, deformable cementitious adhesive for installing ceramic tiles, with
extended open time and no vertical slip.
Keraflex Maxi S1 is particularly suitable for installing large format tiles; highly thixotropic for installing heavy and large format tiles on vertical surfaces without sagging.
Keraflex Maxi S1 contains a very low VOC content that can contribute valuable points towards Green Star™ credits in compliance with the Green Building Council of Australia.

• No Vertical Slip
• High Performance
• Low emission level of VOC
• Suitable for laying large porcelain and natural stone tiles.

Where to Use

• Interior and exterior bonding up to 15 mm thick on floors of ceramic tiles of every type and size (single and double fired tiles, porcelain tiles, klinker, terracotta, etc.) on uneven substrates and renders, without having to level the flooring beforehand.
• Interior and exterior bonding of stone and agglomerate materials (provided that they are classified as stable and not irreversibly sensitive to moisture).
• Spot bonding of insulating material in interior such as expanded polystyrene, rock and glass wool, Eraclit®
  (wood-cement panels), sound-deadening panels, cork, etc.

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 and cooling installations;
– cementitious renders or lime and cement-based mortar;
– gypsum board as long as firmly fixed;
– compatible sound insulation membranes.

• Ceramic and stone material 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 AquaDefense, Mapelastic Smart or Mapegum WPS.
• Interior and exterior bonding of tiles or strips (porcelain tiles, klinker, single-fired, terracotta) with highly profiled ribs or lugs.

Technical Characteristics

Keraflex is a grey or white powder composed of cement and graded aggregates. It contains a high quantity of synthetic resins and special admixtures created according to a formula developed in MAPEI’s research 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 letting even heavy and large tiles slip. Tiles can be installed from the top towards the bottom without using spacer pegs.
• Good capability to accomodate the different deformation of the covering from the substrate.
• Perfect adherence to all materials normally used in building.
• Hardens, even when very thickly applied, without appreciable shrinkage and dimensional changes.
• Particularly good extended open and adjustability time, facilitating installation.

Recommendations

Do NOT use 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 unstable movement due to moisture;
• on precast concrete or substrates subject to excessive movement;
• when surfaces need to be immediately trafficked.

Application Procedure

REFER TO TECHNICAL DATA SHEET PDF (See Specifications – Below)

Tile Installation

It is not necessary to wet the tiles before installation; only in the case of very dusty backs is washing recommended, by quickly immersing them in clean water.

The tiles must be installed in the normal way, placing them firmly to ensure good contact with the adhesive.

The open time of Keraflex Maxi S1 in normal conditions of temperature and humidity, is 30 minutes; unfavourable environmental conditions (strong sunlight, drying wind, high temperature as well as a highly absorbent substrate), could
drastically reduce this time to a few minutes.

Therefore constantly check that the adhesive has not formed a superficial skin and is still “fresh”; where there is a formation of a superficial skin, the adhesive must be reworked with the notched trowel.

Wetting the adhesive after it has produced the skin is not recommended because the water forms an anti-adhesive film instead of dissolving it.

The “adjustability” of the tiles must be carried out within 60 minutes (at +23°C) after installation.

Tiles installed with Keraflex Maxi S1 must not be subject to running water or rain for at least 24 hours and must be protected from frost and strong sunlight for at least 5-7 days after installation.

Spot Bonding of Insulating Materials

For spot-bonding sound-deadening or insulating panels, apply Keraflex Maxi S1 with a trowel or a float, in the necessary thickness required by the levelness of the surfaces 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.

Depending on the size of the grout joint MAPEI recommends the use of Keracolor FF for joint widths up to 6 mm or Keracolor GG for joint widths from 4 – 15 mm.

MAPEI also recommends the use of Ultracolor Plus which is a fast setting grout that contains special additives for water
repellency and anti-efflorescence. This premium grout is available in a vast array of exciting colours.

If the joints need to have good chemical resistance then we recommend the use of an epoxy grout such as Kerapoxy or Kerapoxy Design which are also available in an exciting colour palette.

For elastic expansion joints use MAPESIL AC, a single component silicone sealant.

For movement joints in floors designed for heavy traffic contact Mapei Technical Services on Freecall
1800 652 666 for further advice and information.

Set to Light Foot Traffic

Floors are set to withstand light foot traffic after approx. 24 hours.

Polishing

Surfaces can be polished after approximately 14 days.

Ready for Use

Surfaces are ready for use after approx. 14 days.

Cleaning

Tools and containers should be cleaned with plenty 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:

– 1.2kg/m2 per mm of thickness

Bonding Panels:

– Applied with a Trowel approx. (Rounded notch): 6-7kg/m2

– Spot-bonding (with a trowel): 4-6kg/m2

Packaging

Keraflex Maxi S1 is available in 20 kg bags.

Storage

When stored in dry conditions in the original, unopened bags, Keraflex Maxi S1 has a shelf life of 12 months.
If stored at high temperature and or high humidity conditions the shelf life may be reduced.

Safety Instructions

Keraflex Maxi S1 contains cement that when in contact with sweat or other body fluids may cause an irritant alkaline reaction or allergic reaction to those predisposed.

It can cause damage to eyes.

During use wear protective gloves and goggles and take the usual precautions for handling chemicals.

In case of contact with eyes or skin wash immediately with plenty of water and seek medical attention.

For further and complete information about the safe use of our product please refer to our latest version of the Safety Data Sheet, which is available upon request, or can be downloaded from www.mapei.com.au.

PRODUCT FOR PROFESSIONAL USE