Water Boil Proof plywood (WBP) is one of the best weather resistant plywood sheets on the market, they are designed and manufactured with layers of thin sheets of wood veneer stuck together, the product is high in quality and finish and are a great value for money, they have a reduced splitting when putting screws or nails into the product and have a low expansion to shrinkage giving them a stable use in all dimensions. 18mm Plywood has properties which is found most useful throughout the trade industry. This Hardwood Plywood sheet is an ideal purchase for both Interior and Exterior use.