605 Paragon® PLUS Base is suitable for use as a base/interply sheet for cold process systems. This high-performance sheet may be used over various combustible and non-combustible decks as the initial ply or interply for a specified roof systems. Approved for use on all fire-rated built-up roofs. Contains the asphalt equivalent of Type G2 base sheet and may be used where a heavy type base is required or specified.