If you want to save money and the crack doesn't bother you, you can do the following to stop the cracking extension:) r( r$ @9 A5 J! I" v/ t1 }
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(1) Buy a set-tube Epoxy (come with twin-tube to mix) at auto parts store or homedepot ( F0 S9 E" p( A0 j, V 7 ~& n/ q+ D4 h8 G# q' ?(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. 3 d4 S% L. W$ [" @# S* q- ` : Z) ?" ~. [5 `# R4 p. P0 c(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.