Using tar on pvc drain pipe
Hi, plumber withouth knowing, may have caused a small hole on PVC drain behind concrete wall . The drain pipe is for the bathroom lavatory. I would want to avoid damaging the concrete wall again as it already cost a fortune to have the bathroom re-tiled.. am thinking about removing the lavatory and pouring tar slowly into the entrance of the drain on the wall to seal off the small hole.. on second thought, wouldn't tar damage the PVC pipe? If so , are there alternative sealing agents that I can use? Will appreciate...