The Ultra Trade flexible slow set tile adhesive in Grey is a single part standard set adhesive, suitable for both walls and floors. Sets in 16 hours and is able to take light foot traffic in 18 hours. Its polymer modified formula provides enhanced performance and high bond strength for applications subject to moisture, while its extended workability, enhanced adhesion and flexibility, makes it ideal for areas subject to movement. Suitable for a wide range of tile types including ceramic, porcelain and natural stone* as well as for tiling on to various substrates like wet areas, timber floors and with underfloor heating. *Porous natural stone tiles need to be checked for compatibility to avoid staining.