What is Evergreen Hybrid? A: Evergreen hybrid GRP roofing is a type of liquid-applied roofing system that is designed to be durable, and flexible. It is made from a combination of the highest quality resin, glass fibers, and curing agents that are mixed together and then applied to the roof in a single layer. Aimed at the GreenRoof market, although predominantly used for Flat roofing in general.