LyondellBasell’s expertise in polyethylene technology has resulted in the development of products that copolymerize ethylene with vinyl acetate to produce resins used in specialized applications. Ultrathene ethylene vinyl acetate (EVA) copolymers combine many of the advantages of low-density polyethylene (LDPE), such as clarity and toughness, with outstanding flexibility, low-temperature performance and lower heat seal initiation temperatures.