I agree that you should let your tire repairer know that there is slime inside, but most of us are our tire repairer. Respectively if we are taking the time and effort to manually remove a 6" or 8" lawnmower tire from the rim with a couple of screwdrivers and putting a slime tube in our tire we probably will be repairing it ourself anyway if need be. I have removed slime from tires myself, all you have to do is wash it out with a hose right into the drain. Slime is water soluble and environmentally friendly so there is no problem there. Whatever water is left over, just vacuum or wipe it out. The only problem is when someone pops the bead under pressure and without knowing there is slime inside. I agree that can be a mess but honestly, just hose the crud out it takes 2 minutes. I would rather spend an extra 2 minutes down the road then spend hours being stuck somewhere plus the time and cost savings of having the tire repaired by someone. When replacing with a slime tube you do not have any of these issues. To the do it yourselfer I recommend the stuff wholeheartedly. :thumbsup:
Oh and by the way I used it in my wheelbarrow tire and it stayed liquid for 4 years. When it dry's up it just turns to fibers which makes it even easier to clean out. Just my :2cents: