CRC is basically wax, with a few solvents. It's flammable during application and as far as I can tell, has zero actual corrosion inhibitors...it's a water displacer. Pretty much the same as Cosmoline. Noxudol 300/700 are wax based, are not flammable (no VOC) and do actually contain additives to react with rust. They are also under $30/quart if you're spraying with a cavity gun...I am looking at a few videos and reviews the CRC stuff and it seems very good. I'll try to find the equivalent here.