Once the manhole has been cleaned and all sources of infiltration have been sealed, a spray-applied cementitious coating is added to the existing structure.
Chemical grout is pumped into the outer surroundings of the existing manhole and will cure into place to seal off any infiltration. This process is very effective in stopping active leaks.
GROUTING CANDIDATE VIDEO
In this case, chemical grout was used to stop the leaky manhole.
Note: The leak is coming from above the PVC on the barrel of the manhole.