Society of Plastics Engineers – 4spe.org

Vinyl Siding Institute – vinylsiding.org

Uni-bell – uni-bell.org

Plastic Pipe & Fitting Association – ppfahome.org

American Architectural Manufacturer’s Association – aamanet.org

American Chemistry Council – americanchemistry.org

American Chemical Society – acs.org

American Society for Testing & Materials – astm.org

Vinyl Institute – vinylinfo.org

Plastics Make it Possible – plasticsmakeitpossible.com

Vinyl in Design – vinylindesign.com

Vinyl Council of Austrailia – www.vinyl.org.au

Vinyl Institute of Canada – vinylinstituteofcanada.com

Vinyl Plus – vinylplus.eu