I ready the email from Fine Woodworking regarding the benefits of using Urea formaldehyde glue for bent laminations. It does not mention if this glue is waterproof. I am planning on constructing a small bridge for my back yard and naturally it will be exposed to all sorts of weather here in New England. Can you recommend a glue which is as easy to work with as Urea formaldehyde but is waterproof? Thanks.