UltraTile ProSS Flex is a single part, standard set, flexible adhesive for wall and floor tiles. It is specially formulated with enhanced adhesion and flexibility for use with  ceramic, porcelain and natural stone tiles. UltraTile ProSS Flex is a polymer modified adhesive suitable for use with most common substrates. It has a extended open time of 30 minutes which is ideal for large installations, it is able to take light foot traffic within 16 hours of installation depending upon temperature and substrate. Key Features: • Flexible properties for use in wet areas • 3-16mm bed thickness • 30+ minutes open times • 2 hours pot life • 16 hours set time • Typical coverage of 4.5m²