Does Slime etc sealants actually work in a pinch. I've read where it just leaks out the spoke holes. Can it actually get me home ?
Mine leaked out of some of the spoke holes for the first couple days, then it stopped. Ideally, the Slime should already be in the tube when it gets punctured, but it doesn't have to be. It's just that then, you'd theoretically be carrying a bottle of Slime to use in an emergency. Myself, I get around that by having a new bottle at home and work. Currently, my front tire is not Slime'd, but my rear tire is.
I've never had any luck with it.
Fortunately ( or unfortunately ) I've got enough practice fixing punctured inner tubes that it only takes me 15 to 30 minutes.
Wow that's quick on a motorcycle! Having grown up where goathead thorns were everywhere 6 months out of the year, I'm a pro at patching but I am sick of doing it! And honestly I'm nowhere near that fast prying off a motorcycle tire, especially not on a cold day like when I recently replaced my front tire. I need 15-30 minutes just to smoke and cuss lol
I've had tubes live with Slime through dozens of punctures and all I've had to do was occasionally add air and keep em rolling. Dunno how many minutes that's saved me! I know Slime aint for everybody, it has it quirks, and just about every bad thing people have to say when reviewing Slime is something I have seen and experienced at one time or another. Once one figures out how it works tho, it's phenomenal at protecting against small punctures (<1/8")
I slimed all my rental Himalayans when they were new and had constant problems with the slime drying up in the valve stems and causing leaks. Lots of flat tires. I don't do that any longer.
That's a common problem, and usually the #1 reason people don't use that stuff. Once a tire has been Slime'd, one
must make sure to fill the tire with the stem between 8 o'clock and 4 position. People often fill their tires with the stem between 5 and 7 o'clock because of press-on air nozzles and that is a no-no for the very reason you described - Slime will try to come out the valve core and may gum it all the heck up, requiring the valve core to be removed and the stem cleaned. If one doesn't know that warm water will clean it up like new, it could be a real pain in the butt! Also, I only use air nozzles that lock onto the stem, so filling the tire with stem at a higher position is easier.
Slime on rental bikes sounds like it causes a sort of wack-a-mole