Although flash pasteurizing a wine may not harm it, it probably doesn’t help it either. Red wines are especially sensitive to heating, and in extreme cases may develop a burned or rubbery quality during the mevushal process. For this reason, we prefer to make Covenant and RED C in the time-honored tradition that encourages non-interventionist methods in the cellar. We believe that gentle handling and slow, relatively cool fermentations are the best way to make a wine of superior quality. Flash-pasteurization is simply not a part of our protocols.Covenant and RED C wines are certified kosher for Passover by the OU. They are not mevushal.