Windsor Pickling Salt is pure, non-iodized, and free-flowing without additives, so no unsightly sediment collects at the bottom of the jar. Windsor salt can be used for pickling, canning, and also marinating. Basically, pickling salt (aka “canning salt”) is a salt that has no additives or anti-caking agents. (Common household salt does have additives.) The anti-caking agents are just there to make the salt pourable. Basically, pickling salt (aka “canning salt”) is a salt that has no additives or anti-caking agents. (Common household salt does have additives.) The anti-caking agents are just there to make the salt pourable.