I'm a cake decorator, and make my own "pan grease".
The recipe is equal parts Crisco, flour, and vegetable oil. I mix this well with a mixer until white and creamy. It's nonperishable so does not need to be stored in the fridge. If it sits a while between uses, give it a quick stir because the oil can start to separate. Grab a paper towel and dip into the pan grease and apply liberally on the bottom and sides of cake pan.
