A protein-free, latex modified, flexible, premium grade, cementitious floor levelling compound suitable for use at thicknesses from 2mm to 50mm. It can be used in interior and exterior locations and conforms to EN13813 CT-C35-F10. Benefits include flexibility, high early strength, and suitability for application up to 50mm in one layer. It is pumpable and suitable for external use prior to the application of tiles, and can also be used on domestic garage floors prior to painting with a suitable floor paint. The formulation has a low odour and is suitable for use with underfloor heating. It is self-smoothing.