So far all I've used is the big can with the orange cap from the WW camping section. I used up my can this Summer so don't recall the name. I use it on my soft bags. It beads up the water and seems to work, but it doesn't work in any application where something rubs against it and I doubt if any WP spray will. I also re-apply it frequently as it seems to be a given that ultraviolet rays from the sun will break it down and degrade it.
It also waterproofs the bottom of my gas tank and my crash bars as I'm too lazy to take off my bags and I just spray away with abandon while they're still on the bike.
I didn't know if these "superhydrophobic" waterproofing sprays were different from any other kind. The Hershey's Syrup pour is impressive, but didn't know if it fell into the "ShamWow!" category of video demonstrations.
Maybe I'll steal one of my wife's canvas shoes (tell her the dog chewed it up), a bottle of Hershey's syrup and my cheap, mass-quantitity SP spray and try this with the stuff I use.
I'll check out the Kiwi stuff, Lockjaw.