I've heard that some tire sealants cause the tire to deteriorate. I've also heard of sealants that claim to not damage tires or wheels. The owner's manual makes no reference to any effects the sealant supplied with the Crossfire may have on wheels or tires. I just checked it again to make sure. So I guess I won't find out whether the sealant did any damage to the tire until the dealer installs the new valve.