Ressi PFS 620 A cementitious self-levelling pourable high slump, high strength floor screed which is suitable for most high traffic and high impact areas. The application thickness is between 12mm to 25mm in a single layer. Multiple layers of this material can be applied to make the floor level or to achieve a certain floor level. Provides an ideal substrate to apply subsequent layers of thin self-levelling compounds and other materials such as tiles, vinyl, high build epoxy systems and so on.