Protecting Your World

Protecting Your World




Manhole rehabilitation is an important part of maintaining the safety and functionality of our sewer systems. This process involves repairing, restoring, and protecting manholes from deterioration due to age or other factors. The goal is to make sure that these structures are structurally sound and able to withstand daily wear-and-tear. In recent years, polyurea has become one of the most popular materials used for manhole rehabilitation as it offers a number of advantages over traditional methods such as concrete or asphalt. In this article we’ll take a look at why polyurea is becoming increasingly popular for manhole rehabilitation projects, the benefits it provides, and how it can help keep your sewers safe and functioning properly.

TRENCHLESS Manhole Rehab Techniques

1. Manhole Coating: One of the primary causes for the deterioration of manholes is the corrosion of metal surfaces due to exposure to water, chemicals, and sewer gases. Manhole coating involves the application of a protective layer, generally made of epoxy or polyurethane, onto the exposed surfaces. This coating acts as a barrier, preventing corrosive substances from penetrating the manhole walls. By protecting against corrosion, manhole coating significantly extends the lifespan of the structure and reduces maintenance costs.

2. Grouting: Another prevalent issue in manholes is the infiltration of water, either from the surrounding soil or leaking sewer pipes. This infiltration can lead to various problems, such as soil erosion, foundation instability, and increased risk of collapses. Grouting involves injecting a cement-based or chemical-based material into the surrounding soil or cracks to fill voids and stop water intrusion. It stabilizes the soil, preventing erosion and strengthening the manhole structure, ultimately enhancing its load-bearing capacity.

3. Rehabilitation Liners: When manholes experience internal deterioration, caused by factors like chemical exposure, hydrogen sulfide attack, or physical degradation, traditional repair methods may not be feasible. In such cases, using rehabilitation liners can be an effective solution. These liners are typically made of fiberglass or composite materials and are inserted into the existing manhole to create a new, structurally sound inner layer. This technique not only restores the integrity of the manhole but also prevents future deterioration.

4. Joint Sealants: Manholes consist of multiple precast concrete sections joined together through joints, which are susceptible to deterioration and leaks. Joint sealants are used to fill and seal the gaps between these sections, preventing the infiltration of water, debris, and other foreign materials. By ensuring tight and secure joints, this technique enhances the structural stability of manholes and reduces maintenance needs.


ArmorThane polyurea linings serve as a practical and ideal solution to manhole rehabilitation. They can be molded to the shape of the existing structure. The reconstruction adds to the structural integrity inside to out. One of the advantages of having a polyurea lining is the quick cure time, which allows them to cure right in place.

Different polymer components are regarded as excellent resources for manhole rehabilitation. The properties of polyurethane and polyurea are the most widely used corrosion prevention product. One of the biggest goals is to stop inflow and infiltration, referred to as I&I. This means finding a way to eliminate stormwater and other liquid sources from compromising the structure and penetrating the system.

ArmorThane coatings are formulated to resist a wide range of chemicals commonly found in sewer systems, including acids, alkalis, and hydrogen sulfide. By providing excellent chemical resistance, these coatings protect the manhole walls, preventing corrosion and degradation. This ensures the longevity of the manhole and reduces maintenance costs over time.


Without a profit stealing franchise model that restricts business potential, we assist you in developing a financial plan and formulating product costs that position you for success once you join the ArmorThane applicator network. Starting your own coatings business has never been so easy.

A small investment for coating equipment and products will get you started in a new polyurea, polyurethane, and spray foam business or increase the revenue of an existing company. With no franchise fees or royalties, starting a protective coating business or other ArmorThane dealer business is a relatively low cost venture. 


Take the first step towards a low cost polyurea, polyurethane, or spray foam business opportunity and call us at 800.227.2905 or fill out our contact form below. Someone from our company will contact you to answer your questions and provide you more information.

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