Renapur here to, used it on my boots and it helps keep them weather resistant to (to an extent)
as said sponge it on and leave for a few days in a warmish room (so most room indoors, not your shed etc) i find if i use it on me boots then wear the boots without letting it soak in for a couple of days then it just feels greasy and nasty.
has a lot of beeswax in it and other stuff and when i get round to it i will treat my leather jacket to. good stuff and the pot i had has been treating my boots for a few years now a couple of times a year. so lasts well.