Mapei Keraflex Maxi S1 | High-quality cement-based tiling mortar
Keraflex Maxi S1 is an advanced cementitious adhesive designed for installing ceramic tiles. It boasts extended open time and resistance to vertical slip, catering especially to large-format tiles. Its characteristics and application guidelines make it suitable for various substrates and settings.
Description
- Adhesive Type: Cementitious (C)
- Classification: C2TES1 – improved (2), slip-resistant (T), deformable (S1)
- Performance Features: Extended open time, no vertical slip, highly thixotropic for vertical installations of large tiles without sagging.
Usage Scenarios
Keraflex Maxi S1 finds application in several areas:
- Tile Installation: Interior and exterior bonding of ceramic tiles, stone, and agglomerate materials, including spot bonding of insulating materials like sound-deadening panels.
- Special Conditions: Suitable for substrates exposed to heavy traffic, existing flooring, and waterproofed substrates.
Technical Composition
- Ingredients: Cement, fine graded sands, synthetic resins, and specialized additives developed in MAPEI’s research laboratories.
- Properties: Low viscosity, highly thixotropic, excellent adherence to various building materials, minimal shrinkage on hardening.
Recommendations and Limitations
- Usage Restrictions: Avoid application on specific surfaces like wood, metal, or marble prone to efflorescence or stains.
- Environmental Considerations: Environmental factors affect open time; constant monitoring is advised for optimal application.
Application Procedure
Precise guidelines ensure effective application:
- Substrate Preparation: Substrates must be cured, mechanically sound, clean, and sufficiently dry.
- Mix Preparation: Ensure correct water-to-adhesive ratio for a homogeneous mix with extended workability.
- Adhesive Application: Employ a notched trowel to ensure complete coverage and proper thickness.
Tile Installation and Post-Application Instructions
Proper tile installation and post-application measures are crucial:
- Adhesive Open Time: Regular checks for a fresh adhesive consistency are essential, especially in adverse environmental conditions.
- Curing and Protection: Tiles should be protected from water, rain, frost, and strong sunlight for specific periods after installation.
Grouting, Polishing, and Readiness for Use
Grouting of joints, polishing, and readiness timelines after installation are outlined:
- Grouting Joints: Grout wall joints after 4-8 hours and floor joints after 24 hours using recommended grouts based on joint sizes.
- Usage Timeline: Light foot traffic endurance is achieved after approximately 24 hours, with complete readiness for use after around 14 days.
Technical Data and Performance
The technical data elucidates mix ratios, consistency, adhesive properties, and performance characteristics such as adhesion strength, resistance to environmental factors, and deformability.
Packaging, Storage, and Shelf Life
Keraflex Maxi S1 is available in 20 kg bags and has a shelf life of 12 months under appropriate storage conditions. High temperatures or humidity can potentially reduce its shelf life.
Conclusion
Keraflex Maxi S1 stands as a premium solution for cementitious tile installations, offering extended open time and strong adherence to various substrates. Its comprehensive guide ensures effective application, durability, and reliable performance in diverse settings, making it a choice adhesive for professionals in the tiling industry.




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