+1 for homebrew. My recipe similar to crazyt. It is 1 part Slime (the oldschool innertube version, not there tubeless MTB specific stuff), 1 part RV antifreeze (propylene glycol), 1 part latex mold builder, 1 part water (plus or minus until I reach the right consistency), add glitter to taste.
It weeps, but so do the others. For the price, I'll take a little weeping.
I'm probably the odd duck on this one, but I like to crack my tires off the rim every time. It's the only way to know what's in there, clean up any boogers, and add a lot or little with confidence.