Arboresin is a porous tree pit surface made of bonded gravel forming a porous cap over the tree pit.

As well as resolving the risk of a trip hazard, loose stones are a nuisance in pedestrian environments and tarmacadem or conventional paving has the effect of an impervious cap over the tree pit.

With Aboresin the stone is bound together, preventing the gravel migrating beyond the tree pit. Rotary pavement sweepers can easily run over the surface without displacing the stone.