a water based coating composition for unvulcanized rubber articles that comprises a polymeric antidegradant latex , an additional emulsifier , a thickening agent , and a filler / mold release / lubricating agent . the water based coating composition is placed on an uncured rubber article prior to vulcanization and results in improved molding of the rubber article and provides a final rubber vulcanizate that possesses superior antidegradative properties .