That's great! I took an alpine travel course taught by Ome at the "U", where he shared the secret of warming the boots in the oven so the treatment would penetrate the leather. Depending on the type of welt, it could be a real challenge to seal the area along the sole and IIRC there was a second product for just that when it was an issue with a particular boot.

Leathers are tanned in so many different ways now my suspicion is the fraction of leather footwear that Sno Seal works with is a small one. The brand is now owned by a company called Atsko, who seem to sell a one-quart can for that lifetime supply (several lifetimes).

Cheers,