Trojan Plywood’s Boiling Waterproof Plywood (BWP Plywood). Discover what makes this versatile material a game-changer for your construction and interior. Durability and water resistance are crucial when choosing building materials. The Boiling Waterproof Plywood, or BWP Plywood, is designed to fulfill these specifications. It is a type of plywood that is ideal for wet areas like kitchens and bathrooms because it can resist prolonged contact with moisture.