Good question Retired on 40, cool name as well. I was originally thinking bentonite chips or plugs may be easier to work with at our 30' underwater depth. After further research, I am now leaning towards a hydraulic cement. If anyone can recommend a hydraulic cement product that fits this specific application, please let me know.
We have no emergency but with this repair we only get one bite of the apple. Looking for a long term solution versus low cost and the repair not lasting.
MH
