Level More  Flex&Fibre A flexible, fibre reinforced, rapid setting, levelling and smoothing compound Kelmore’s Level More  Flex&Fibre is a flexible, fibre reinforced, rapid setting, levelling and smoothing compound which can be applied from 2mm to 50mm in a single application. Ensuring excellent workability, adhesion and moisture tolerance, it is suitable for use on a wide range of subfloors, including applications below damp proof membranes, on underfloor heating systems, and plywood overlays. Providing superb flowing capabilities and dimensional stability, this protein free product sets with an outstanding surface finish and can be walked on after 90 minutes. Resilient floor coverings can be fitted after 3 hours and porcelain, ceramic, and natural stone tiles can be fixed after 2 hours. Highlighting its true versatility, Level More  Flex&Fibre is suitable for interior and exterior use and can also be installed as a wearing surface.