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Mapei Keraflex Maxi S1 Grey 20kg is a high-performance, flexible cementitious adhesive designed for installing ceramic, porcelain, and natural stone tiles. Suitable for both internal and external applications, this grey tile adhesive offers excellent bond strength and flexibility, making it ideal for use on floors and walls in residential or commercial projects. The formula is engineered to reduce vertical slip and allows for the installation of large format tiles without sagging. Mapei Keraflex Maxi S1 is easy to work with and provides extended open time for precise tile placement, ensuring reliable results in tiling installations.