Environmentally friendly road surfacing binder, completely porous, ideal for driveways, garden patios, small and large parking areas, access road, pedestrian footpaths, playgrounds, parks, SPA areas, B roads. Biostrasse is a binding agent that acts on inter-granular conglomeration at the chemical and physical level, permitting the creation of permeable, draining or impermeable road surfaces, capable of supporting heavy loads. Because of its certified environmental compatibility, it can be used anywhere, even in Sites of Communitarian Interest (SCI), Zones of Special Protection (ZSP) and Special Conservation Zones (SCZ), or where there are limitations in the use of non-ecologically compatible materials.