Easy to use, versatile, and created for use on the whole roof or on critical roof areas such as eaves, ridges, valleys, dormers and skylights, the RhinoRoof RSA Self-Adhered Underlayment is designed to protect roofing structures from water infiltration caused by wind-driven rain, snow and ice dams. RSA also features the RhinoRoof synthetic textured walking surface that offers superior steep slope walkability in wet or dry weather conditions. RSA is engineered to lay flat and not buckle or wrinkle when exposed to temperature and moisture fluctuations on a roof. Its unique formulation seals around roofing nails or metal roofing fasteners and provides superior adhesion to plywood decking without the need for primers or nails, ensuring long term protection from wind-driven rain and ice.