Belzona 9631

Belzona 9631 is a leak-sealing kit containing a 5cm x 150cm / 2in x 60in fiberglass pre-impregnated wrap which is activated by water. Packaged in a hermetically sealed foil pouch, it is ready to use and does not require any measuring or mixing.

Belzona 9631

A leak-sealing kit containing a 5cm x 150cm / 2in x 60in fiberglass pre-impregnated wrap which is activated by water. Packaged in a hermetically sealed foil pouch, it is ready to use and does not require any measuring or mixing.

It is odourless and very simple to apply. This material bonds well to copper, steel, SS, PVC and many other substrates. Belzona 9631 is a versatile solution for industries where quick-action pipe repairs are critical.

Kit Contents:

  • Gloves
  • Surface roughing mesh
  • Cleaning wipes
  • Water-activated wrap in a sachet
  • Release film

Key Benefits:

  • NO MIXING. Belzona 9631 is ready to use
  • EXCELLENT ADHESION. Bonds to many substrates
  • TURNAROUND. Quick return to service
  • PRESSURE. Resists pressures ~7bar

Applications for Belzona 9631 include:

  • Cracked pipes
  • Corroded pipes
  • Force mains
  • Gravity lines
  • Leaking pipes
  • Irregular pipe fittings
Key technical data:
Working life 1.5min at 40°C/104°F

3min at 20°C/77°F

6min at 10°C/50°F

12min at 5°C/41°F
Tensile shear adhesion: Wet/dry mild steel:
990/750psi (6.8/5.2MPa)

Wet/dry copper:
850/330psi (5.9/2.3MPa)

Wet/dry SS:
1949/980psi (7.2/6.8MPa)

Wet/dry GRP:
0/360psi (3.4/2.5MPa)
Tensile shear adhesion (Immersion): 1170 psi / 8.1 MPa after 1000 hours immersion at 40°C/104°F
Heat resistance (HDT): 66°C/150°F at 20°C/68°F
Flexural strength: 23.8 x 103/165MPa
Pressure retention capability: On a 76mm/3-in dia pipe, prepared to SSPC-SP11, with a defect up to 6mm diameter, typical value for Belzona 9631 tested as a nine-layer wrap will be 100 psi/7 bar.
Shelf life: 2 years

Cure Times:

Belzona 9631 will be hard in 60-90 minutes at 68°F (20°C) but curing will take longer in dry climates or cold temperatures.


More information:

For more information about Belzona 9631 please contact us or find your local distributor.

You can apply to join Belzona Connect to access additional information including SDS and instructions for use.

Video:

Photo gallery:

Product documents:

You are currently viewing documents in

For More Information regarding Belzona Products,
please login by clicking here.