The low-temperature flexibilizing plasticizers selected will determine the quality and economies of this formulation. The following low-temperature plasticizers were tested in formula 8 in place of dioctyl adipate and the low temperature flexibility obtained was as follows: "Hylene" D Dioctyl Sebacate "Flexol" 4GO "Flexol" TOF "Baker's" P-4 "Baker's" P-8 "Plastolein" 9250 "Plasticizer" SC "Harflex" 500