amazon.com: thompsons 10100 aerosol water seal multi-surface ...
rust-oleum 247167 concrete sealer spray, matte clear, 15-ounce. 4.3 out of 5 ... for multi-surface waterproofing of small projects, thompson's waterseal clear .... the texture felt like a layer of plastic on the wood that made it non porous.
exterior adhesives: choosing the right waterproof outdoor glue
sep 27, 2017 ... post updated 2nov2017: exterior adhesives for gluing wood ... situations where one or both surfaces are made of plastic or metal. .... i'd apply spray adhesive to the back of the sign only, then stick the sign to the glass.