Eastman TetrashieldTM protective resin MP2104 for metal packaging enhances the performance of Bisphenol A non- intent (BPA-NI) metal packaging coatings. With high solids, improved retort resistance, and broad chemical resistance, formulations featuring Eastman TetrashieldTM protective resin systems can achieve superior performance results in interior food contact metal packaging applications. Tetrashield MP2104 resin can also be used in ends, caps and closures, and general line applications to improve coating performance in these applications as well as to formulate high solids coating formulations. This resin provides superior functionality for gold phenolic coatings with broad formulation latitude.