Pulled the front tires on my rer series 1 and slimed them with a couple oz. of "Slime" sealer. Rolled them over in my hands for a while and all he sidewall and bead seal problems went away. and these babies were old man,...I hope it holds one more summer...and I know,..I know,..they'll be a mess to take apart but big deal.
You really need to over inflate them the run for about an hour to get enough goo into the hole.
Do not be surprised to come back & find the tyres flat again.
The trick is just to reinflate & go mow.
Note all of the tyre goos are SOLUABLE IN WATER so mow in the rain, or get the tyre really wet & you are back to square 1