The "Geon" 575X43 and "Geon" 577 formulations feature good coating flexibility. The "Geon" 450X167 formulation gives a firmer coating and contains no extractable plasticizer. The formulation based on "Geon" 460X1 exhibits increased durability and permanence. All of these formulations are subject to modification in order to reflect cost limitations, coating add-on and flexibility requirements, and the degree of flameretardancy desired.