R-Mer Seal is a self-adhering, high-temperature metal roofing underlayment. It comprises a durable, non-slip, cross-laminated polymer film laminated to a high-temperature rubberized asphalt adhesive. A split-release film protects the adhesive on the back side of the membrane and prevents the roll from sticking to itself during storage and handling. R-Mer Seal is engineered as a continuous secondary waterproofing underlayment under Garland’s metal roof systems. R-Mer Seal can also be used in valleys, ridges, penetrations, and eaves for protection against ice dams and wind-driven rain. It can also serve as an underlayment for coping caps and edge metal applications.