Tyre repair gunk

[gmc15]

My Son got a puncture in his Seat Leon a couple of days ago. The car has no spare but just a can of tyre repair gunk. He used this but the hole must have been too big for it to work. He had to get recovered home on a breakdown truck.

I took the wheel with punctured tyre to a local tyre centre and was told that because he had used gung in the tyre it was not repairable and I had to buy a new tyre!

Just goes to show that these cost/weight saving measures are not all that good really! I am now looking out for a spare wheel for him to carry in the boot - probably just as cheap as buying another can of gunk

[X5Sport]

The only thing no spare does is save the manufacturer the cost and improve their emissions footprint.  It does nothing for the customer!

[chubbs]

Recently, I had a can of tyre repair gunk that was just about to go out of date, so I thought I'd test it on my wheelbarrow inner tube. I also sprayed a load into an old tin can to see what it did over a period of time. What a pile of rubbish it turned out to be! It didn't mend the hole in the inner tube (it was a small hole) and when it was in the tin can it fizzed around for a bit and then, within 15 minutes it had turned into a thin, milky liquid which wouldn't seal a hairline crack in a mosquito's thingie.

In my opinion, a spare wheel is the only solution to a non-runflat puncture. Has ANYONE used it successfully?