The top PGXpand® Polymers are unique and highly compatible asphalt modifiers that increase the high-temperature performance (Softening Point, SP), while maintaining the low-temperature performance of the asphalt. PGXpand® incorporates readily into hot asphalt with low shear mixing; yielding a stable polymer modified asphalt with high heat resistance that does not degrade or separate in storage. PGXpand® allows the modified asphalt producer to improve the high-temperature performance of their incoming asphalt with no appreciable damage to low-temperature ductility or adhesion. For example, the addition of 1 – 2 % PGXpand® to an asphalt flux can help double softening point from 100 F to 200+ F, while lowering viscosity by 5 – 10 %. PGXpand® also functions as an excellent dispersing aid when used in combination with conventional polymers such as linear or radial SBS. PGXpand® dramatically improves softening point, tack, adhesion, and strength while typically lowering viscosity. It supports higher filler loadings in polymer modified asphalt formulations and is used in Built Up Roofing (BUR) and modified asphalt formulations, including self-adhered membrane formulations. Two grades of PGXpand® are currently marketed. Both are free-flowing powders. PGXpand® 502 is available in full truckload quantities in 1,000 lb supersacks 460 kg). PGXpand 501 is available in full truckload quantities in 50 lb (25 kg) bags. Trial quantities available upon request.