Injecting stuff into window cracks?

[vancouverbc]

there is supposed to be something to inject into glass cracks to make them invisible and to prevent them from growing. Does this really work?

[AceInhole]

only works on the actual "bull's eye". If the crack is already a decent length then it won't work.

[ralphdig]

It can work, up to few inches long, but the crack must be recent, non dirty or contaminated, well cleaned: a small hole is made at the end of crack to stop growing, then the resine is injected whith presure alternating cicles of vacum and presure to remove any air bubles inside, it cuts about 85 or 90% sun glare (reflection) witch is whats makes crack visible, then is sealed, and let resting until it cures 5 to 10 mins. at most.It works, once I bought a Glass Repair Kit and made some good reparations for me and friends.

Beware: if crack is old then this is useless.