Solventless, clear, epoxy lining that can be applied using reinforced glass fibers specifically designed to comply with API RP652 for thick-film tank bottom lining repairs. API RP652 specifically recommends "long fiber" reinforcement which can be achieved using a glass mat or chopped glass. The system is suitable for exposures in water, crude oil, aromatic distillates and unblended gasolines. It can be applied by standard or plural-component airless spray equipment depending on the glass reinforcement used.