Boysen Plexibond is a specially formulated acrylic polymer that serves as a cementitious waterproofing system when mixed with Portland cement or pozzolan. This mixture creates a durable, flexible coating that offers excellent water resistance and adhesion, making it ideal for "positive-side" waterproofing of surfaces like roof decks, firewalls, and concrete surfaces to prevent water seepage. It is designed for thin-section applications, improves the flexibility of otherwise brittle cement, and can also be applied on wood and certain metal surfaces for corrosion resistance.