Flow applied flooring Altro resin flow applied flooring provides systems for application to flat level floors, at thicknesses from 1mm to 5mm, providing an easily maintained, smooth, seamless surface, with good chemical, abrasion and impact resistance. Modified flow applied systems of between 2mm and 6mm in thickness are available where anti-slip performance is required. Both systems require the substrate to be treated with AltroPrime. AltroFlow is three pack, epoxy, solvent-free, low taint. Improved colour stability – AltroFlow ICS is now available in pure white, and in a range of vibrant colours.