I install Slime Tube Sealant in my electric scooter that has tubed tires to fix and prevents punctured flats. I also install it in another scooter of mine with tubeless tire and I've found that also works in tubeless tires too.
Slime Tube Sealant at Amazon (affiliate link): amzn.to/3Jag8eR
Tire valve extender: amzn.to/3NcJVEZ
Electric kick scooters: amzn.to/3p1KAkr
Dont let a flat ruin your day, let Slime's Tube Sealant protect your tires and get you back on the road quickly and easily when you get a flat. Slime Tube Sealant seeks out and instantly seals punctures in your tubes up to 1/8" (3mm) using Fibro-Seal Technology. It gives you two years of continuous flat tire protection. Use Slime in an emergency to repair & seal punctures and slow leaks on all scooters, bicycles, dirt bikes, wheelbarrows and strollers. It's environmentally friendly, non-toxic, non-corrosive, non-hazardous, non-flammable, and water soluble for easy clean up.