I know its very popular for car manufacturers not to supply a spare tyre in favour of a can of 'gunk' and a compressor. They tout this as weight saving equating to better mpg and less CO2 emission etc - but i'm not convinced and suspect its just a cost reduction. Anyway, has anyone had to use the OEM gunk Audi provide with their cars? I'd be interested to hear any experience like, did it actually work? Were the tyre company able to remove and sort out the punctured tyre or was it a messy pain? Was it easy to use by the roadside? Thanks!