Hi,

Mazda take the trouble of saying at least twice in the manual that you should replace any tire that's repaired with the sealant kit supplied with the car.

Does anybody know why this is please?

I have been told that some people have successfully de-gooed other car tires that had been patched using sealant kits, and then had them repaired conventionally.

Although I don't plan to ever use the kit (Australian RX8s come with a spare tire) I can't help wondering what Mazda had in mind.

Are they just being ultra-cautious, or are there known possible problems that can crop up with repairing and re-using tires after contact with with sealants?

Is this just the usual sort of disclaimer about using any repaired tires in potentially 'high performance' situations, or is there actually some technical issue here?

Thanks. :)

I've read that some of that goop can settle unevenly in the tire and then unbalance it. Other's have said it eats or weakens the inside?

I'm just parroting what I've read, I don't know if any of this crap I'm spewing is true... ;)

I suspect it may well be Mazda being overcautious. Note that they say "take it to your Mazda dealer for replacement," not "take it to your local tire outlet who may be able to repair it."

I strongly suspect that (a) they don't want to recommend a repair in case a repaired tire subsequently fails and the owner tries to hold them liable, and (b) they don't want to put their dealers on the spot: "I'm sorry, sir, we can't repair your tire", "but the manual says you'll repair it!"

probably throws off the TPMS....some how..maybe...well it was a good thought...

I don't know this for sure, but I wouldn't be surprised if the goop coating the inner wall of the tire renders the patch adhesive ineffective. ;)

Imbalance seems like a good candidate. Plus they're worried you would consider goop a "permanent" repair and not take it in for patch. Then sue them when you have a catastrophic failure. Just a guess...