Poly-1 is a high-strength polyester fabric that is used to reinforce Preservation Products elastomeric coatings in critical areas such as flashings, transitions, roof penetrations and areas where the roof has deteriorated. In certain situations Poly-1 is used to reinforce the entire roof. The combination of Preservation Products coatings and Poly-1, embedded into the coating, creates a high-strength reinforced membrane in our Roof Restoration Systems.