Outdoor Weatherproof Glue - LePage- exterior wood glue waterproof ,LePage Outdoor Weatherproof Wood Glue is a durable, high performance, water and moisture resistant interior/exterior wood glue. It dries to a tough, high strength bond with over 3700 psi shear strength on maple. Outdoor Wood Glue is intended for tight fitting joints in wood working projects that will have occasional weather exposure.What Is The Best Plywood For Outdoor Use? (Solved!)Exterior graded plywood refers to ply sheets that have had their veneers glued together with waterproof glue. Now, not all exterior graded plywood comes with chemical treatment as standard. But you can, (and always should), buy exterior graded plywood that has been pressure treated.