Shuttering plywoods Shuttering Plywood is a highly densified plywood with a smooth film coating on both sides of the faces and is used primarily for cement formworks during construction. Commercial Plywoods Commercial plywood in simple terms is the basic or standard plywood available. Commercial plywood is also termed as MR grade plywood. MR stand for moisture resistant. Marine Plywoods Marine-grade plywood is a sturdier, higher-quality material. There are several different grades of Marine plywood. Every grade typically has a distinct knot size and frequency, as well as a unique weight and thickness for its plies. Block boards Blockboard is made up of softwood strips and veneers. They are manufactured by placing softwood strips edge to edge and sandwiched between veneers and then this sandwich is glued together with high pressure.