I don't treat my work boots with any kind of oil, wax, protectant or sealer. They're work boots, for crying out loud. They get covered in mud, concrete, shit, flour, feed (a.k.a. "Pig Shit Starter"), paint, grass, snow, oil, grease and general industrial funk. When they get dirty, I hose them off. When they get worn out, I buy a new pair. I'm not trying to impress anybody with how shiny my work boots are.