If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:5 W" z5 f1 M6 p; p
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(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot & B, D' @: M; S( a0 F# R; }- \. @ 3 ^& J8 L8 [" `' }( x9 x/ `) ~! y(2) To buy a round or square think-glass-disk with diameter or side length of 1 inch. If you can't find it, you can go 99 cents stores or dollartree to buy a large-clear-cloth-button at similar size. ! T6 g7 K: y- M& I% B9 B' T1 x1 P5 r) \! b1 n' G$ m
(3) Prepare Epoxy well, spread the paste to one side of the glass or button, attach it to the crack-upper-end from inside of windshield. Wait for 24 hrs. It'll be as solid as a rock and permanently stop the crack extension.