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Hydrophilic Sealing / Grouting Compound



OSVX3 Hydrophilic Sealing and Grouting Compound is a one-component, "Acetone Free", MDI based hydrophilic sealing and grouting compound used to stop water leaks in wet environments. Hydrophilic Sealing and Grouting Compound, as it mixes with existing water, cures rapidly into a tough, flexible, closed-cell compound which is insoluble to water and most other chemicals.


  • Simple to use, one component material. (See note above).
  • Cures to a flexible, permanent seal with excellent bond to most construction materials.
  • Is not a flammable or combustible liquid.
  • Is applied in a moist and wet environment.
  • Can be machine-pumped or hand-applied by caulking cartridge.


Uncured Material

Color Amber
Viscosity (ASTM D 1638)
Reaction time <25 seconds
450 cps ± 100
Density 9.4 Lb. gal
Flash Point (ASTM D 93) >220°F
Expands on Reaction 7 times original volume

Cured Material

Tensile Strength (ASTM D 1564)   84 ±10 psi min.
Elongation (ASTM D 1564) 500% min.
Shrinkage - Linear <15 ± 3%
Corrosiveness Non-Corrosive
Toxicity Non Toxic when cured
Shelf Life 6 months
Cure TimeVaries, dependent upon accelerator added, ambient temperature, and temperatures of grouting compound.

Reaction and Set Times




Without accelerator @ 70°F 4 to 5 min. 6 to 8 minutes   
With accelerator @ 70°F 30 seconds     1 minute


OSVX3 Hydrophilic Sealing and Grouting Compound is used in many ways to stop water leaks.

  • To pressure inject in cracks or hairline cracks, the same way as low viscosity epoxy resins are used. Cracks should be wet, not dry. If cracks are dry, moisten with water.
  • In expansion joints that are sealed with polysulphide, polyurethane, silicone, or any other sealant, the  Hydrophilic Sealing and Grouting Compound
    is injected behind the sealant to produce a waterproof elastic joint.
  • In concrete or steel liners, such as in tunnels or foundations, holes are drilled, one way valves or packers installed, and  Hydrophilic Sealing and Grouting Compound
     is pumped in. Once in contact with water, a chemical reaction takes place, and it sets within 3 to 5 minutes.
  • In sewer line joints or any large size joints, to produce the most economical cost per linear foot, saturate any absorbent material such as rope, jute, or oakum, with  Hydrophilic Sealing and Grouting Compound
    . Remove excess  Hydrophilic Sealing and Grouting Compound
    and force into joint. Spray with water to activate. Repeat procedure until joint is filled.


 Hydrophilic Sealing and Grouting Compound
 is available in 1 gallon, 5 gallon pails and 55 gallon drums.

Epoxy Verses Urethane Injection

 For more information see "Epoxy Injection or Urethane Injection, which is better?"



Contains Toluene Diisocyanate prepolymer. Avoid breathing vapors. Keep container closed. Use only in well ventilated areas. Wear rubber gloves, safety glasses and protective clothing. Use NIOSH approved respirator in confined area. See MSDS for further safety precautions.


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