Waterproofed my brand-new pair of elk skin ropers, got rained on the next day, gloves stayed perfectly dry.
It's a bit hard to make sure to get total coverage as its very thin and it's hard to see where you've already been. The rain showed me two small spots I missed as those were the only two spots on the gloves that got wet.
I agree with Ron A. that it's hard to get out of the bottle. (Posted on 8/7/12)
This stuff works great, but check to see if you are allergic first. I used it on some high end leather gloves, and had to give the gloves away as my hands broke into a horrible rash every time I wore them. Nikwax doesn't include an ingredient list, so test it on your skin first. (Posted on 12/28/11)
This stuff really worked. And on gloves with leather palms! After the first rain, I needed to reapply it, though. Now I've been through two rains and still no soaking through. My only complaint is that the liquid is so hard to get out of the bottle. It's supposed to squeeze out onto an applicator pad but it takes a lot of pressure. (Posted on 4/24/09)