4057-55 - A/C Re-New Revitalizes & Energizes Air Conditioning Systems - 4 ozNu Calgon 4057 55 A C Re New Revitalizes & Energizes Air Conditioning Systems 4 oz A C Re New, formerly Zerol Ice, has been used successfully for many years to improve the performance of air conditioning and refrigeration systems. A C Re New provides significant saving in energy use. It also quiets noisy systems and extends the life of the system. It is a lubricant that blends with the systems oil, lasting for the life of the equipment, or until the