I followed directions to the letter, even waiting one hour to spray again for best results"as the can indicates.
No effect. Water gets into my leather boots--even from dew on the grass.

So I resprayed several days later.
No effect.

I resprayed two days later.
A very slight effect, if any.

I'm halfway through the can. Maybe the good part is at the bottom. Nevertheless, it's failed the test.