green stain/sealer product formulated for exterior/interior use on all properly prepared, unsealed wood surfaces including bamboo
Decks, Railings, Shingles, Shake Roofs, Siding, Fences, Planters, Outdoor Furniture, Play Structures, Log Homes & Structural Framing
"Applying his extensive knowledge of chemistry, Mike created a unique polymer using nanoparticles that had the ability to easily penetrate the wood, creating a clear flexible film that was not only waterproof from the surface, but also breathable and impervious to salts and chlorides." (see 'The Story Behind Seal Once' under 'About Us' on the company website)
The company home page also references "unique polymer nanoparticles" used for their Seal-Once brand.
150 Dow Street
Manchester, NH 03101
available online (under 'Technical Info')