[masraum]

I'd wonder about just using PVC cement, but I would be concerned that would just end up being temporary. There is PVC cement that is one part that can be applied if the environment is already wet. But I'm not sure how well it will work without being able to expand the gap and then press the gap firmly back together.

So, my thinking is
Would you like to fix it now and not know if the fix will last a day a month or a year
or
Would you like to fix it the hard way today and know that the fix should be as permanent as it could be.