Mapei Keraflex Maxi S1 (C2TES1) Cementitious Adhesive 25KG (GREY)

Description 
• Keraflex Maxi S1 is a grey or white powder composed of cement and fine graded sands. It contains a high quantity of synthetic resins and special additives according to a formulation developed in MAPEI’s research laboratories.
• The innovative Low Dust technology which characterises this adhesive, allows the amount of dust emitted while mixing the product to be drastically reduced compared with standard cementitious MAPEI adhesives, making the work area more comfortable and healthy for floor layers.
• A mortar with the following features is obtained when Keraflex Maxi S1 is mixed with water:
   - Low viscosity, therefore easily workable.
   - Highly thixotropic: Keraflex Maxi S1 can be applied on a vertical surface without slumping 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 thicky applied, without appreciable shrinkage and without decreasing in thickness, until acquiring a considerable resistance.
   - Particularly extended open and adjustability time, facilitating installation.

Features
• High performance, deformable cementitious adhesive with extended open time and no vertical slip, for ceramic tiles and stone material, with Low Dust technology. Especially suitable for the installation of large-size porcelain tiles and natural stone.
• High Deformability (S1 Rating)
   - Keraflex Maxi S1 is classified as a deformable adhesive (S1), meaning it has high flexibility and can absorb some substrate movement without losing adhesion strength.
   - Ideal for installations where temperature fluctuations or slight substrate movements may occur, like outdoor areas or floors with underfloor heating.
• Extended Open Time
   - This adhesive offers an extended open time of up to 30 minutes, which allows for more time to place tiles and make adjustments.
   - Especially useful in complex installations or large tile applications where precision is required.
• Thick-Bed Adhesive
   - Keraflex Maxi S1 can be applied in thicknesses of up to 15 mm, making it suitable for use as a thick-bed adhesive.
   - Ideal for uneven surfaces or large-format tiles, as the thicker application allows for better leveling and more secure adhesion.
• Non-Slip and Sag-Resistant
   - Thanks to its excellent thixotropic properties, the adhesive is highly resistant to vertical slip, making it ideal for wall applications.
   - Suitable for large tiles and heavy materials, as it prevents tiles from sagging or shifting after placement.
• High Adhesion Strength
   - Keraflex Maxi S1 offers superior bonding strength, which enhances its durability and long-term performance.
   - Suitable for a wide variety of tile types, including ceramic, porcelain, natural stone, and marble, on various substrates.
• Suitable for Large Format Tiles
   - Specifically designed to support large and heavy tiles, which require adhesives that can handle additional weight and surface area.
   - Ideal for tiles larger than 60x60 cm or similar sizes.
• Water and Frost Resistance
   - This adhesive has high resistance to water and frost, making it suitable for areas exposed to moisture, such as bathrooms, pools, and outdoor spaces.
   - Its frost resistance also makes it ideal for exterior installations in cold climates.
• Versatility Across Substrates
   - Compatible with a wide range of substrates, including concrete, cementitious screeds, heated floors, gypsum-based plasterboard, and old tile surfaces.
   - This flexibility means it can be used in many different applications and on various types of surfaces.
• Reduced Slip for Wall Applications: When applied vertically, Keraflex Maxi S1 has reduced slip, which aids in the secure and precise installation of wall tiles without the tiles slipping downwards after placement.
• Ease of Application
   - It’s designed to be easy to apply, with a smooth consistency that makes spreading and adjusting simpler.
   - Suitable for both professional tilers and DIY applications, thanks to its user-friendly handling.
• Low Dust Formula: Mapei offers a low-dust formula that reduces the amount of dust generated when mixing and applying, making it safer and cleaner to work with.
• Long Pot Life: The adhesive has a long pot life (usually 8 hours), meaning it remains workable for extended periods, giving applicators time to complete large installations without rushing.
• Packaging: 25 kg/bag. 
• Storage: 12 Months in a normal environment. 
• Consumption: 1.2 kg/m² per mm of thickness.
• Conformity Keraflex Maxi S1 is declared in ITT certificates n° 25070387/Gi (TUM) and n° 25080246/Gi (TUM) issued by the Technische Universität München laboratory (Germany).

Technical Data
Incompliance with: 
   - European EN 12004 as C2TES1. 
   - ISO 13007-1 as C2TES1. 
   - American ANSI A 118.4.
Product Identity
• Type: Powder
• Colour: Grey and White
• Bulk density (kg/m³): 1400
• Dry solid content (%): 100
Application Data (at +23ºC and 50% R.H)
• Mixing Ratio: 100 parts Keraflex Maxi 32-34 parts water by weight
• Consistency of the mix: Pasty
• Density of the mix (kg/m³): 1500
• pH of mix: over 12
• Pot life: aprrox. 8
• Application temperature range: 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
Final Performance
Tensile adhesion strength in compliance with EN 1348 (N/mm²):
   - Initial tensile adhesion strength (after 28 days): 2.6
   - Tensile adhesion strength after heat ageing: 2.5
   - Tensile adhesion strength after water immersion: 1.1
   - Tensile adhesion strength after freeze/thaw cycles: 1.3
• Resistance to alkalis: Excellent
• Resistance to oils: Excellent (poor to vegetable oils)
• Resistance to solvents: Excellent
• Temperature when in use (ºC): From -30°C to +90°C
• Deformability according to EN 12004: S1 - deformable
• Ready for use (days): 14 days
 

​​​​​​​​​​​​​​Where To Use
• Interior and exterior bonding, up to 15 mm thick, on floor or 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 materials (provided that they are not sensitive to moisture).
• Spot bonding of insulating material in interiors such as expanded polystyrene, rock and glass wool, Eraclit® (wood-cement boards), 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.
• Ceramic and stone material tiles on existing flooring (ceramic, marble, etc.).
• Installation of floors subjected to heavy traffic.
• Laying ceramic in areas with poor ventilation or close to inhabited buildings, where dust emission must be reduced to the minimum possible.
• 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.

Recommendation 
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 movement due to moisture.
• On precast concrete or subject to strong movement.
• When surfaces need to be ready for traffic in a short time.

• Technical Data Sheet (T.D.S). 

Disclaimer
All product images shown are for illustration purposes only. Actual products may varies in term of size, type, brand, version, colour, and other relevant characteristics.