The ports are used to inject the Poly foam under the slab.
Driveway during the repair process.
PolyLevel can be used on steps also.
The cracked and sinking slab before it was repaired.
The sinking driveway is repaired with poly foam.
Full view of the driveway before the PolyLevel
Project Info

Homeowner Shashi and family have lived in their home since 2006 and for the last two years have noticed that their driveway and front step were cracking and sinking. Sinking driveways can be a safety hazard and can cause future damage to your concrete slabs and foundation. PolyLevel is used to lift and level concrete slabs.