Equivalent leak sealer for PVC pipes? (doh!)

[gball]

I've routed a small (22mm) PVC drain pipe under a newly laid concrete floor. Although I thoroughly wet-tested the pipe before the concrete was laid, it looks like one of the 90deg joints must have been disturbed with the screeding - it hasn't sealed properly as there is a small damp patch.

Now apart from telling me I was stupid not to run it in a conduit or high pressure testing it (!), I'm looking for a suggestion that doesn't involve lifting the floor and breaking the screed.

I know for copper heating pipes you can buy a leak sealer additive, but is there something similar that gloops down the pipe and would seal a weeping joint? A kind of thin version of solvent weld!

Thanks for any suggestions (and yes, feel free to laugh at me!)

 

[JohnD]

hahaha

go find your big hammer.