Originally Posted by
DirePenguin
I also have a “down the valve” sealant injector to minimize mess.
I purchased one as well for putting sealant in and taking it out*. However, the latter proved to be problematic as the sealant in the tire occasionally forms little balls of rubber in the tire that like to clog the syringe hose.
I have since resorted to breaking the bead on the tire and either pouring the sealant in or dumping it out that way, avoiding the need for a syringe / injector at all.
* I remove the sealant from my wheel sets in the Fall as the wheels just sit for months on end during the Winter or remain stationary on my smart trainer and I don't want the sealant to dry into a pool in one spot in the wheels. I guess this is another disadvantage of going tubeless... you don't have to remove the tubes on wheelsets that see little or no use.