Kneel down and give thanks that you now live and ride where sealants are not needed. I did have a very nice 20+ mile fixed ride today, stubbornly pushing the 75” gear against gusty winds, and the added ~2 fl oz of OS regular in the rear RH TPU tube did slow the persistent very slow leak down to the point where I had to stop only 1x to rebuild air pressure (and, to be honest, I could probably have made it home without pumping).
BUT!!!
I added ~2 fl oz of OS regular into the rear TPU tube before the ride, which involved:
Replacing a gummed-up valve core (which I cleared by soaking the core in rubbing alcohol and furiously rubbing with a rag;
Cleaning up after the core-less valve stem kept burping quantities of sealant over the rim, spokes, frame, and floor;
Pumping the tire with newly replenished sealant up to 60 psi (559 x 28 mm actual RH 32 {labeled} Elk Pass), only to have the valve spit the now-replenished sealant back up into the chuck, and, when chuck removed, spitefully vomiting it one more time over everything in an unstoppable flow. I resorted to filling a water bottle with clean water and washing down the mess, leaving a puddle on my garage floor.
Once again, most — not all by any means, but most — of the effing hassle of sealant in tubes comes from the valves (Presta). No matter what you do, OS gums them up, which makes adding air hard to do; then when you replace the core, the film hardened across the tube-to-valve stem interface still resists easy air entry; and when you puncture this film — not at all always easy — the valve spitefully spits sealant back at you, the spokes, rim, tire, frame, and floor.
The only things worse than using modern sealants are: riding stiff, sluggish tires, and: fixing 150 punctures per year.
What I’ve learned: OS regular formula works pretty well with TPU tubes, but not quite as well as with butyl tubes. And, one more thing: I’ve had sealant problems with RH 559 x 30mm — 48 mm TPU tubes, but not at all with the 622 X whatever range RH TPU tubes I use on the Roadeo under 32 mm Stampede Pass extralights. Odd.
Lastly, the OS Endurance in my tubeless Schwalbe 54 mm actual extralight Thunderburts is generally more benign, except when you get a larger puncture, when it will spray itself all over bike and rider; and it inevitably gums up the valves and, lastly, dries and collects as a weight-adding skin inside the tire casing.