^^^^not really... what the gel does is pushes the air out of the cracks and hardens like a sealant
what windscreen o'brien normally do on chips is they drill out the chip as long as it doesn't exceed the 5mm and fill it with a hardening gel.
the whole process is seamless.
i use something similar to this... can be purchased from repco for $30. Bought mine at the motorshow last year at 2 for 1
http://www.ufixit.xrwh.com/
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