Manhole Joint Sealing

Our polyurethane injection application is ideal for rehabilitating manholes, and sealing joints and lateral lines against inflow and infiltration.

Infiltration and Inflow (I&I) can wreak havoc on stormwater and sanitary sewer systems.  I&I can cause soil subsidence around manholes and lateral lines, cause blockages, overburden treatment facilities with excess water, and reduce the useful life of sewer infrastructure by overwhelming capacity designs or causing damage to the utilities.  Our polyurethane injection (Chemical Grouting) process is an ideal manhole joint sealing application for public works managers who need to extend the life of their sewer infrastructure.

Why Polyurethane Injection for Manhole Joint Sealing?

Polyurethane injection is ideal for manhole rehabilitation as it is causes minimal disruption, a small footprint, and requires no-excavation.  We inject our polymers through 5/8″ holes through the manhole wall, or from the surface.  Once injected, the polyurethane expands up to 25 times its initial volume and fills any present voids, and densifies the soil around it.  Our specially formulated polyurethane is hydrophobic and environmentally inert, so it can be injected into areas with high saturation and still be able to expand with significant structural stability and sealing capability.

The polymer expansion direction is controlled by the injection technique and volume of polyurethane injected. This allows for the experienced Concrete Leveling Solutions team to accomplish your goals, whether stabilizing support soils, filling voids, or sealing the manhole and lateral lines against I&I.


  • Manhole Joint Sealing and Stabilization
  • Can be injected Vertically and Horizontally
  • Minimal Footprint Required
  • Fast Curing Polymers cause minimal disruption to services
  • Filling Annular Voids
  • Stabilizing and Strengthening Weak Soils Beneath the Structure
  • Preventing Future Soil Washout
  • No Excavation and Minimal Mess
  • Avoid Having to Pour a New Slab
  • Environmentally Friendly Polymers

manhole joint sealing atlanta


Our polymer injection application doesn’t require excavation or trenching, allowing for minimal impact to your structure. Our project footprint is minimal, requiring a small trailer, a hose running from the trailer, and small 5/8″ holes that are drilled through the structure to give us access to drive our rods to target locations and inject our high-density polyurethane.

Our polymers are light-weight and add minimal weight to the area. This is a major advantage because often times treatment is required because the added weight is to much for the geology of the area.

Our polymers set up to 95% capacity within 15 minutes, unlike other solutions which require 24-48 hours and ideal soil conditions.  After 15 minutes, the material can be driven on and take on heavy loads.

Our polymers are environmentally inert and have no impact to the environment or groundwater

Not only is our process the fastest and most effective foundation and slab lifting application, but it is the most cost-effective too.