I recently purchased a bottle of the Nikwax leather conditioner/waterproofer and applied it to my Lowa Tibets. After applying it I didn't notice much of a difference in the look or the feel of the leather. I then ran it under the faucet and the water seemed to absorb into the leather just as much post treatment as it did before so I was not impressed.
I then decided to try the Nikwax waterproofing wax for leather. After applying this the leather turned a bit darker and had a much more supple feel to it. I then ran the boots under the faucet for 5 minutes and the water just kept beading up and running of like water off a duck's back.
I haven't hiked in the boots with either of the applications but in my opinion the wax is the superior waterproofing substance.
I then decided to try the Nikwax waterproofing wax for leather. After applying this the leather turned a bit darker and had a much more supple feel to it. I then ran the boots under the faucet for 5 minutes and the water just kept beading up and running of like water off a duck's back.
I haven't hiked in the boots with either of the applications but in my opinion the wax is the superior waterproofing substance.