Sealants play a crucial role in preserving the integrity and longevity of manholes and other underground structures. From preventing groundwater infiltration to combating corrosion, these products ensure robust performance and reduced maintenance needs. Advanced sealing systems like those below are versatile, adhering to a variety of substrates, and can often be applied quickly and safely, minimizing the need for confined-space entry.

Oatey Hercules Shutout Manhole Lubricant and Sealant
Hercules Shutout Manhole Lubricant and Sealant from Oatey is a nontoxic, universal manhole sealant and lubricant that reduces inflow and makes manhole maintenance easier. It is applied to manhole frames to create a seal, enabling airtight and watertight frames and cover interfaces. It adheres to dry, wet, hot and cold surfaces, offering optimal protection in both freezing and high temperatures. In addition to inflow reduction, it promotes ease of use for waterworks contractors and municipalities. It requires no additional training and only takes a couple of minutes to apply, including preparation and cleanup. Applied with a caulking tube, it can be easily transported for use as part of regular operations and maintenance activities. It also makes it easier to open manhole covers, providing lubrication that prevents rust and corrosion between the two metal surfaces, thus decreasing the force required to open the cover. 800-321-9532; www.oatey.com

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CCI Piping Systems WrapidSeal Manhole Encapsulation System
The WrapidSeal Manhole Encapsulation System from CCI Piping Systems consists of an engineered primer and a wrap-around, heat-shrinkable sleeve designed to seal joints and prevent groundwater from entering a collections system. This material has a high-shrink membrane (70% stretch and 40% recovery) designed to shrink around any manhole profile. In addition, the high-tensile strength accommodates structural movement, while the tough backing resists soil stress and provides suitable abrasion resistance. It can be used for new construction or for the rehabilitation of existing manholes to control infiltration through joints and prevent deterioration, thus eliminating costly maintenance repairs and the added expense of treating groundwater. 800-867-2772; www.wrapidseal.com

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Sauereisen SewerSeal F-170
Sauereisen’s SewerSeal F-170 is a durable, calcium aluminate-based lining that prevents water infiltration to underground infrastructure. Its versatility allows for use in manholes and lift stations regardless of the type of substrate – concrete, brick or steel. It resists microbiologically induced corrosion common to the municipal environment. The combination of low permeability and high chemical resistance makes it a strong option for protecting or restoring structures within sewage collection systems. Spin-cast equipment utilized for a rapid installation process is standard. The equipment includes a pump and common spin-casting head, allowing installation from ground level. This accelerates the rate of application and improves safety by minimizing confined-space entry. Following proper surface preparation, the product can be applied in one pass of variable thickness, ranging from 1/2 to 2 inches. It is moisture tolerant and requires no primer to attain a tenacious bond. 412-963-0303; www.sauereisen.com

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Sealing Systems Flex-Seal 2.0
Flex-Seal 2.0 from Sealing Systems is an all-purpose sealant that adheres to many surfaces and has over 800% elongation. It is designed to prevent inflow/infiltration and to provide corrosion protection at the grade adjustment ring section or joint section of manholes and catch basins. It’s 100% safe and Prop 65 compliant. The internal seal is manually applied using a paint brush and the kit is designed to cover 12 vertical inches on a 27-inch-diameter manhole. 800-478-2054; www.ssisealingsystems.com

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The Strong Company Strong-Seal System
The Strong-Seal System from The Strong Company offers a variety of cost-effective engineered cementitious products designed to rehabilitate municipal concrete and masonry structures and effectively stop inflow, infiltration, and exfiltration. When spray-applied to a minimum of 1/2-inch thickness, the cementitious mortars are an impervious monolithic liner with compressive and flexural strengths exceeding that of the original structure. Both MS-2A and MS-2C are fiber-reinforced spray-applied cementitious mortars. Made with Portland cement, MS-2A is the most cost-effective solution for stopping infiltration and restoring structural integrity. MS-2C provides high early strengths and added corrosion protection in mild sulfide environments. High Performance Mix is a pure-fused calcium aluminate mortar that stops infiltration, restores structural integrity, and protects against microbiologically induced corrosion in sanitary sewer systems with harsh sulfide conditions (pH of 1.0 or greater). 800-982-8009; www.strongseal.com