... E1/E2 Usage:Can be used for roof decking, roof sarking etc. High quality OSB for buliding product specification 1. Tight ... corrosion and fire, water proof, consistent when exposed in the natural or wet environmet, Low formaldehyde emission, Good nailing ... nailed, drilled, grooved, planed, filed4. Usage:Can be used for roof decking, roof sarking, wall sheathing flooring, packing, hoarding, signboards ...