Sarnafil adhered roofs are best for low sloped, uniquely shaped or pitched roof applications composed of non-nailable substrates such as pre-cast or pre-stressed concrete, cementitious wood fiber or gypsum. They also work well over non-nailable substrates such as concrete, steel and wood decks. The EcoBond Roof which utilizes our water-based adhesive, Sarnacol 2121, also has a few cost competitive solutions because of its excellent coverage rate.