Construction joints are another source of water leakage. Water leakages at these points are plugged when crystalline powder in paste form is applied over the joint.

To put a check over the leakage, construction joints are first cut into deep grooves. Grooves are then cleaned off any loose particles.

Filler material of paste is filled in the groove. It is allowed to dry up for solidification.  Upon solidification, it plugs the joint blocking the water leakage point.