I thought the same thing. A bunch of my cracks appeared while it sat in the hot sun for a month on the side of my house when I was redoing the front box. Before u start make sure u clean the roof REALLY WELL and get all the dirt and mold off the roof. You wouldn’t believe all the cracks that showed up once I did that. I wasted 40 hours trying to drill those holes and fill with ABS MEK. Glueing the ABS back down doesn’t work. Look for any place that water could get in. If the cracks are much longer than an inch or if they are on the top of roof the water is probably getting in. If the cracks are just on the side like the first ones I had and nothing on top you might be ok. I wish I would have tried doing it 5 years ago when I only had the 3- 4” cracks on one side, it may have extended the roof life but from some of the threads I’ve read it sounds like more would’ve showed up eventually. Good luck with whatever u try.