I have about 4 qt. containers in the freezer that hold rendered out beef tallow. Find all sorts of use for it, from time to time. Get fat free from local supermarket and then render it out a big cast iron pot outside. Never used it for seasoning CI. Crisco is my goto. Tried the beeswax and it worked beautifully. Question about all this is, "If the material polymerizes at 425 to 450 degrees, what does it matter what it is?" If it polymerizes, it polymerizes, in my mind. Maybe some more experienced members can straighten this out for me, dunno. What is better?-->What works for you in your experiences, experiments and use, is my answer.