Hi-Flow Renovation Used at thicknesses from 5mm to 50mm as an economic means of renovating existing interior floors prior to the installation of floor coverings. Hi-Flow Commercial When laid at thicknesses from 3mm to 20mm Hi-Flow Commercial is suitable for use in commercial buildings. Hi-Flow Base Designed as an underlayment to complement Hi-Flow Tuf-Top and provides an economic means of raising and smoothing industrial floors. Hi-Flow Tuf Top When laid at thicknesses from 7mm to 20mm Hi-Flow Tuf-Top is suitable for use in warehouses or internal industrial situations. Truflow-B A pump or hand applied self-levelling synthetic anhydrite screed which is used for sub floor levelling.