The truth of the matter is Ride On Tire Balancer/ Sealant is water soluble. It has a consistency of Molasses and adheres to the inner tire surface and not the rim. Have it installed in my six motorhome tires and have never had a smoother ride on my bus. The tires are 275/75 R22.5. The garage that installed the RO recommended it and had a unmounted tire which had RO and it was not on either sidewall. Pretty amazing stuff IMHO.