OSB/3 board comprises softwood flakes/strands bonded together with MUPF (melamine urea-phenolic) resin, MDI (diisocyanate diphenylmethane) binder and waxes. The board is manufactured to the specification detailed in BS EN 300 : 1997 for OSB/3, loadbearing oriented strand boards for use in humid conditions.

All OSB/3 used by SBS is from sustainable timber sources.