Does wrapping affect the fire rating?
A fire rating belongs to a complete tested assembly, not to a finish material. Class A describes surface burning under ASTM E84, not a fire-resistance rating in minutes. Koroseal publishes that all Reatec finishes meet Class A, and 3M publishes that most DI-NOC products are Class A. For fire door and frame work specifically, Koroseal holds UL Certificate of Compliance 20200417-R27442 covering cladding materials for fire doors and frames. We confirm the finish, the substrate and the opening before install, and documentation is available on request.