Paraffin or wax is no longer an acceptable method for sealing jars of jams and jellies. Wax paraffin can shrink, crack or have pinholes that allow product to seep out onto the surface, creating mold that can enter into the jam or jelly. Pre-sterilized standard canning jars used with self-sealing two piece lids, hot filling of product into jars and processing five minutes in a boiling water canner are recommended for highest quality and to prevent mold growth.
Paraffin or wax is no longer an acceptable method for sealing jars of jams and jellies. Wax paraffin can shrink, crack or have pinholes that allow product to seep out onto the surface, creating mold that can enter into the jam or jelly. Pre-sterilized standard canning jars used with self-sealing two piece lids, hot filling of product into jars and processing five minutes in a boiling water canner are recommended for highest quality and to prevent mold growth.