Thanks, John! I think I used Proofide in the past on this saddle. No problems, sometimes the effect was not very noticeable, but some like Obenauf's LP better. Somehow I have the sense Proofide is intended for finished leather surfaces, not rougher saddle bottoms. My first inclination is to stay with Proofide on the top.
I've used SnoSeal in the past on heavy leather field/forest boots, my Herman Survivors. Enough people here and elsewhere are cautious about silicone, that I would avoid it for my vintage saddles. On older boots I have even used liquid silicone, which has not even made a good waterproofer. So in my mind SnoSeal is out. And my can of it, perhaps 30 years old, has a sharp chemical smell. If I have to smell it while riding or handling the bike, I would not be happy. I don't recall if it was better when new, I was in my late 20's when I bought it. And there are other leather dressings focused on waterproofing which do not use silicone or any other synthetic compounds, Obenauf's LP and Fiebing's SnoProof as examples.
Last edited by Road Fan; 10-12-20 at 10:01 AM.