These frauds are also happening on the pune shirur patch near Ranjangaon. A person will come on his bike while u r driving and will tell u that ur tyre is punctured. Usually there is a puncture shop within 100 mtrs, when this scammer targets u. The puncture shop then finds multiple punctures in ur tyre and markets you the anti-puncture liquid gel to save ur tires in the future. They charge heavily for those gels.