AFAIK, no matter what one does with a cracked windshield, lumalaki yung cracks/guhit after a period of time. There are silicone based sealants that are available at auto shops, even Concorde I think. But, they are only temporary solutions. Best bet, albeit an expensive one, is to have your windy replaced. Good luck.
i'll take your words for it, but for now na wala sa budget - repair muna siguro. tnx!