Broken Bow Fire Dept, Broken Bow, OK September 8, 2014 · by Hostetler Roofing · in Completed Roofing Projects, Foam and Coatings system, PVC rubber membrane. · The domed section of the building has a foam and elastomeric coating system, and the flat section has a single ply PVC membrane. Flexion 50 MIL PVC membrane. Foam and elastomeric coatings. Share this:TwitterInstagramFacebookLike this:Like Loading...