If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:4 P+ N# Z/ Y! X! f9 C
5 K( v1 l+ b* H9 a+ L5 B(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot 8 ~- G5 F2 | J' l( E6 I0 F I& e4 d
(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. ! q% w& ?+ n; O1 _% C4 H `% f8 r+ @# \: N" E* x/ q8 }
(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.