who manufactures closed cell foam?
EXT. 12 Intl: +1 732-229-3444 â Toll Free: (800) 375-1960. Monmouth Rubber & Plastics has been a U.S. Manufacturer of Durafoamâ¢ closed cell sponge rubber and plastic foam materials for more than 50 years. Monmouth also manufactures Airaflexâ¢ open cell sponge rubber & plastic foam; Duraflexâ¢ solid rubber and plastic sheeting; and Bondaflexâ¢, which is a material made from recycled rubber & plastic composites.