Lignin Biocoating (LBC) is a petroleum-free, natural, functional coating that imparts water resistance to paper and board as used in corrugated boxes or anything that needs a barrier to water. This is significant as an alternative to single use plastic. Our Liquid Water Barrier properties are excellent, but it is unknown what impact exposure to ethanol will have. By creating solvents at various concentration and replacing water during the Cobb test, this can be determined.