BB Plyform board is an OSB product (oriented strand board) with a sealed oil finish for concrete forming. This plyform oil finish allows the concrete to not stick to the surface. Available in 3/4″ thicknesses only. Sold by the full 4’x8′ sheets only.
Oriented Strand board is made of wood chips and interior resin. It is mainly used for interior wall sheathing. Available in 7/16″ thickness only. Sold by the full 4’x8′ sheets only.