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• #27
Nikwax works very well for quite a long time, but it has silicon in it and will eventually destroy the leather, I know I did it, the only possible exception is leather that has been especially treated and impregnated with silicon such as very high quality hiking/climbing boots. Otherwise after a year or two at most the leather will start cracking, then just throw it away, it is irretrievable.
Use beeswax/natural oils if you are serious about keeping leather for more than just a year or two. It works, I tested it sun and rain working in a California vineyard for 7 years, nothing destroys leather faster than extreme sun and wet alternating, faster.
Not yet got a leather saddle, but used to use the old Nikwax/hairdryer combo on hiking boots. It works so well. Also, when rubbing wax in use your warm fingers rather than a rag, it just helps keep the wax warm while you work it into the leather.
Once managed to work so much nikwax into my boots that a stroll through some moorland heather didn't even scuff them.