SOLUTIONS FOR STOPPING LEAKS

Prime Resins offers chemical grouts for stopping leaks in a variety of structures. By analyzing the structure type and the size of the leak, you can then determine which product works best for the given scenario. A Prime Resins technical consultant is available to advise on the best product and approach for your situation.

Weeping Leaks and Gushing Leaks

hairline-crack-repair

Hairline crack repair – Pell City Wastewater Treatment Plant

With weeping or small leaks, a major focus is on the viscosity, or thickness, of the resin. Low viscosity resins can easily penetrate the cracks and ensure that all cracked areas are repaired.

Hydrophilic chemical grouts are attracted to water and ‘chase moisture.’ In doing so, the grout follows all paths along the crack in order to reach and seal the leaks. For purposes of sealing leaks with chemical grouts, a hairline crack is considered one that is 1/16” or less. Several Prime Resins products are independently verified to meet NSF/ANSI Standard 61.5 for contact with potable water, making them ideal for water treatment, transport and storage structures. Other areas of environmental sensitivity, such as seawalls, are also great candidates for our NSF compliant products.

When encountering a gushing leak, quick reaction or ‘set’ times are important. This ensures that the resin has the opportunity to react with the water currently present and expand quickly enough to form a watertight, rigid foam before the leak can wash grout away. Set times can be controlled by catalysts or activators. Where hydrostatic pressures are high, a hydraulic cement patching material or oakum can be used to stop or slow the flow enough for the chemical grout to react.

Equally important is the expansion rate. Gushing leaks are caused by larger flows of water, meaning that a large area would need to be sealed in order to stop the leak. Using products with higher expansion rates allows for greater coverage of the void area. In below-grade structures, the large expansion rate also serves to fill any voids behind the structure and thus forms a curtain that serves as a 360-degree shield.

Typical structures include:

Gushing leak repair – Stillwater Dam

Gushing leak repair – Stillwater Dam

  • manholes
  • tunnels
  • storm sewers
  • pipe joints
  • retaining walls
  • seawalls
  • dams
  • below-grade parking decks
  • water treatment tanks
  • elevator pits
  • box culverts
  • below-grade vaults, walls, pits or floors

Dams, nuclear plant cooling basins, public aquarium tanks, building foundations, water and sanitary sewer lines. Prime Resins products have been used in all these locations to seal leaks.

Uncontrolled infiltration and inflow* — I&I — is a budget killer for water authorities. Chemical grouting is a cost-effective, time-tested solution to controlling I&I in manholes and pipes. (∗ If surface inflow is the only source of unwanted water into a system, the LockDry device from our sister company, LockDown Inc., may be be the solution you need.)

Weeping leaks, hairline cracks

AR 800 Acrylate, very low viscosity, low toxicity, elastomeric gel, primarily for geotechnical applications, NSF/ANSI 61.5 compliant for potable water use
AR 870 Acrylate, very low viscosity, low toxicity, elastomeric gel, for crack injection in structures
Prime Flex 900 XLV Hydrophilic, polyurethane, single-component, extra low viscosity, NSF/ANSI 61.5 compliant for potable water use
Prime Flex 900 MV Hydrophilic, polyurethane, medium viscosity, single-component, for medium to wide cracks
Prime Flex 920 Hydrophobic, polyurethane, low viscosity, variable set time, NSF/ANSI 61.5 compliant for potable water use
Prime Gel 2800 Strippable Rapid cure polyurea non-sag paste for temporary surface seal prior to crack injection of epoxy or polyurethane grouts. Can be peeled off, leaving a clean surface.

Gushing leaks

AR 800 Acrylate, very low viscosity, low toxicity, elastomeric gel, NSF/ANSI 61.5 certified for potable water use, primarily for geotechnical applications
Prime Flex Hydro Gel SX Hydrophilic, polyurethane, extra low viscosity, single-component, NSF/ANSI 61.5 compliant for potable water use
Prime Flex 920 Hydrophobic, polyurethane, low viscosity, variable set time, NSF/ANSI 61.5 compliant for potable water use
Prime Flex 940 Hydrophobic, polyurethane, variable set time, highly expansive foam, NSF/ANSI 61.5 compliant for potable water use
Prime Plug Hydraulic cement product to stop water flow prior to crack injection
Oil-free oakum Oil-free jute roping
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