Leak Repair

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Prime Flex 985 LX 10 / LX 10 Fast

Prime Flex 985 LX10 is a two-component, low exotherm, polyurethane foam used to fill voids, stabilize soil and underseal concrete slabs. Its very low viscosity allows for moderate permeation effects. It can also be used for compaction grouting soils. A fast-reacting formulation, 985 LX10 Fast is also available. It reacts in 18 seconds versus 70 seconds for standard LX10.

Recommended Uses

  • Undersealing and stabilizing concrete slabs
  • Compaction grouting of soils
  • Stabilizing soils
  • Filling voids behind pipes, walls, manholes and other structures


Typical Areas of Use

  • Concrete Slabs
  • Pipes
  • Manholes
  • Roadways
  • Sinkholes
  • Seawalls



  • Quick set time
  • Extremely fast-reacting version available in 985 LX10 Fast
  • Low viscosity
  • Hydro insensitive
  • Bonds with soil and to concrete
  • Low exotherm (will not self-ignite)
  • Meets Fla. DOT specifications for soil injection of chemical grout


Completed Projects

• AK Steel – Middletown, OH      • Duke Energy – New Richmond, OH


Cured Characteristics

When cured, 985 LX10 has a compressive strength of (ASTM D-1621) 79.9 psi and 11,505 p.s.f., an expansion rate of 10 times, a density of 4.65 pounds per cubic foot, and no shrinkage (ASTM D-1042 / D756).



10 gallon units
* Standard Prime Flex 985 LX10 will ship unless LX10 Fast is specified.


Made in the U.S.A.