If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:- e$ J J# |+ u1 a2 T$ E% P9 k0 R) c
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(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot * m4 C1 l4 i& A+ N 5 E6 g, F2 ?( m) V5 n4 B0 _4 X(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. 7 G5 u# I' v1 M. _3 T 9 ^" I1 R8 u! J0 f' Y. @(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.