Bond Wood and Engineered Wood Products Responsibly. Produce perfect bonds every time with our WP-4379-2 crosslinking PVA adhesive. When combined with our K-1 crosslinking agent, this environmentally-friendly, Type I, exterior-use, water-based adhesive is LEED compliant and specially formulated for cold press, hot press, radio frequency, and finger jointing applications. WP-4379-2 comes highly recommended for fine exterior doors and windows. And don't forget to visit our website for more LEED compliant adhesives for the Millwork industry.