If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:8 U; E5 J- [7 c" m
% B+ w9 K' R! E" W8 b* E(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot% H6 Z' n# M- }2 {4 ?( Z2 I% L
3 k9 k2 f. B8 v! P/ D& Q# P(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. 8 u. U0 E; n. W) ^9 ^7 F% Z8 X6 Z
(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.