After the country’s major glue manufacturers introduced their polyurethane glues at the chicago hardware show four years ago, we came back to our shop here at. The ends of the risers to meet the frames. glue and nail the risers from the outside with 11/4-in. siding nails, spaced 3-in. apart and bridge the side bat-. Technical information. made from 100 percent everflex neoprene, an x-foam formulation, for durability and better health. suits are assembled using a solvent-free.