With more and more cars being delivered without full size spare tyres, and some with no spare just a can of gunk that is expected to seal and inflate a flat, I am unable to find a Choice report about how well those cans work, and which ones/types work better than others. Did my search fail?
If not, Consumer Reports has done it for the US market (subscription-walled) so maybe Choice can partner to provide a localised version for our market.
Consumer Reports also have a youtube teaser that also highlights (for more of us in Australia than the US, a serious problem with some of the cans, temperature). The temporary nature of the ‘repair’ is also repeatedly referenced but the limits of what puncture they can seal is at best usually vague when referenced at all.