bobknh wrote:Thanks for the update. I guess it's the solvent in the Stan's that's at issue. I've been using Orange Seal Endurance - without this problem.
The Finish Line apparently uses ethylene glycol as a solvent/carrier, which other sealants use to some degree. The weeping occurs as a result of the rubber barrier/liner breaking down thru flexing of the sidewall over time and mileage. True UST and most "Tubeless Ready" tires use a more impermeable layer of rubber to prevent air and sealant escaping, but even TR tires seem to start "bleeding" well before the tread is worn out.
Anyway, as I see it, the only reason to use Finish Line is the longevity benefit. Also, if you have a spare set of tires that you don't use often, latex sealants can form a solid mass where it pools at the bottom, unless you rotate them often. The Finish Line (in theory) shouldn't do that.
Orange Seal Endurance does last longer than many, however you never really know when it's time to add more unless you open up the bead or use a dip stick through the valve. As long as you're diligent about checking content, then any of the latex products will suffice.
I'll stick with my homebrew Stan's-like sealant. No issues. I don't mind the latex sealants that need refreshing/maintenance every few months. Stan's uses propylene glycol as one of the parts of the liquid portion and this is for the anti-freeze properties. My older homebrews that involved Slime, RV antifreeze (ethylene glyclol), and latex weeped like crazy from my old Specialized mtb tires (green droplets formed all over the outer casing). My homebrew (and Stan's) doesn't do this - I am curious about the Finish Line product...is it more like original Slime in terms of not needing to be refreshed/long lasting?
To my knowledge, there is no "solvent" in Stan's. Stan's is: liquid latex, ammonia, propylene glycol, water, and cornmeal.
TiGeo wrote:I'll stick with my homebrew Stan's-like sealant. No issues. I don't mind the latex sealants that need refreshing/maintenance every few months. My older homebrews that involved Slime, RV antifreeze (ethylene glyclol), and latex and it weeped like crazy from my old Specialized mtb tires (green droplets formed all over the outer casing). My homebrew (and Stan's) doesn't do this - I am curious about the Finish Line product...is it more like original Slime in terms of not needing to be refreshed/long lasting? My guess is "yes"; regular Slime never took-off as a viable tubeless tire sealant on bikes but was ok for filling inner tubes etc. to seal small punctures (and adding a ton of rotating weight). Keep in mind, tubeless-ready tires are not butyl-lined to make them air-tight so they need some sort of "smeg" layer to keep the air in hence latex sealants. This Finish Line stuff sounds better suited for UST applications (does anyone even use UST anymore?).
BTW - To my knowledge, there is no "solvent" in Stan's. Stan's is: liquid latex, ammonia, propylene glycol, water, and cornmeal.
I switched to Finish Line sealant as soon as the shop could get it in. So far maybe 500 miles, 4 races, 3 tire swaps.
\n1) I've noticed that immediately after beading up there will be a little leakage at the bead if I push on it, but this stops after a day (could be due to hookless rims?).
\n2) the sealant doesn't form a dry layer like latex sealants, but the consistency leaves a fairly thick coat of the sealant over all surfaces in the tire. In the event of a puncture the sealant is right there clogging the hole, just like latex sealants.
\n3) When swapping tires I can scrape down the inside of the tires & recover the same volume of sealant that I put in. Zero residue of any kind left in the tire so all the good stuff transfers to the new tire.
\n4) I got to test the sealant's efficacy IRL during a race- ran over a piece of barbed wire on a descent and watched a small white dot appear & with each tire revolution I'd see white thread-like shapes come off the hole, then flatten. That happened for a few minutes then stopped. No pressure loss in the tire and at the end of the race the hole was plugged.
\n5) I'm looking forward to trying this with WTB tires; I stopped using Nano's, one of my favorite tires, after I had 3 show casing separation using Orange Seal. Since there's no ammonia in this stuff I'm thinking it should be nicer to tires.
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\n*Forgot to mention, so far I've used this with Vittoria Terreno Dry TNT casing, Panaracer Gravel Sling(🤢), & Kenda Flintridge Pro tires.
OTHRider wrote:Copied from another site - I also had the wet spots when using both Stans and Orange Seal with certain tires. The Racing Ralph 2.35 that I ran on the front for an entire year was one big wet spot when it wore out. It didn't lose much air, but it definitely seeped. One thing that is holding true with the Finish Line is better air retention. I have only added air to the rear tire one time since a couple days before VQ and that was only a pound or two. With Orange Seal and Stans, I added a pound or two every ride. The front hasn't had FL as long, but it seems to be holding just as well.
I'm back from an over-seas trip with my family. I haven't touch my bike for nearly a month and my tire pressure are still at 29/32 (last ride was around 36/39)
