Long story short, I have about a 3" crack in the WS. No chips. Will this be sufficient?
https://shop.advanceautoparts.com/p/permate...%20repair%20kit

I may be wrong but I don’t think there are products to repair or stabilize cracks. The product you linked to is for repairing “bullseye damage up to 1 1/4" in diameter” to keep them from spiderwebbing and turning into cracks.

Take it to a professional shop. They might be able to drill a hole at the end of the crack and fill it to stop it from spreading any further, but I don't think they can make a crack disappear.

Partswerks, I just installed a new windshield (China). It fit perfect and the cost was only $200 picked up at glass shop. Just replace. Best, Mark

Pros can do a lot more than they used to. Call one up and get a quote. I know a mobile guy that gives me a very good deal if I come to him. Repairs have been almost invisible and have lasted.