Combine freezer jam pectin and sugar in medium bowl, stirring to blend evenly. Add crushed red raspberries and crushed blueberries. Stir mixture 3 minutes. Fill can-or-freeze jars, leaving 1/2-inch headspace. Wipe rim and threads of jar with clean, damp cloth. Adjust cap. Refrigerate or freeze.
Tip: Refrigerate jar or two of freezer jam for immediate use and freeze the rest. Defrost freezer jam in refrigerator.