There are two main resin gravel systems available – Resin BOUND and Resin BONDED gravel.
Resin Bound vs Resin Bonded Surfacing:
Resin Bound Gravel is a trowel-applied system that has selected aggregates mixed with the resin and laid to a smooth, level surface with no loose stone. Resin Bound provides a decorative, hard-wearing surface dressing.
Resin Bonded Gravel is where the chosen aggregate is scattered and bonded onto a resin base, providing a textured appearance of loose stones. The Resin Bonded system will have some initial shedding of aggregate and needs to be swept and maintained, ensuring that loose aggregate is removed.
In Resin Bound surfacing the aggregate is mixed with the resin. The material is then trowelled down to a smooth finish similar to a screed (with no loose stones). Depths are specified depending on use, normally 12mm, 16mm, 18mm or 24mm.
For more information on Resin Bound Surfaces.
Resin Bonded surfacing is a scattered aggregate system that provides texture and the appearance of loose gravel.
A layer of resin is applied to a suitable surface and covered with loose aggregate. Once cured the remaining loose stones are removed. Thickness is governed by aggregate size. i.e. 1-3mm aggregate will have a nominal depth of 4-5mm.
For more information on Resin Bonded surfaces.