Bear and Mutton tallow makes good patch lube. You can melt it down and add a little bees wax if it is too thin, and it will work into a patch.

I have the word out to the bear guides up here that when they butcher bear for clients, save me some of the leaf lard off them bears. I want to render it down and have some uses for it. For those that have not used it, rendered leaf lard off a bear is excellent for cooking. Render it twice as they say, once to get the stink out of it and once more to make it pure as snow.