So I am replacing my water service and bringing it from outside to inside I went under the footing through a two foot long 2" abs sleeve. I stuffed the 3/4" pex line through and even wrapped a couple of rags around it to center the pex in the sleeve. Before backfilling I thought that I should seal the sleeve to prevent water, dirt, or mice from coming in. Looked around for a proper sealing system and grabbed a tube of polyseamseal that is used for caulking around bathroom faucets and tubs. The PSS is water cleanup and paintable. I just dumped the tube at the mouth of the sleeve, smoothed it with my finger, and then backfilled. Do you suppose that this caulk will burn a hole in the pex? It would be a terrible place for a leak.