Thermo-Wrap™ is a custom engineered composite system utilizing a high strength, non-crimped bi-directional fiberglass architecture in conjunction with NRI’s patented inspectable Thermo-Poxy™ epoxy system to repair corroded or damaged piping. Using common radiographic inspection methods, owners and operators have the ability to monitor the integrity of an “in-service” Thermo-Wrap repair through the course of its intended design life. It is a qualified, engineered system designed to conform to ASME PCC-2, ASME B31, ISO TS24817, DOT, API, and CSA Z662 standards for nonmetallic reinforcing solutions.


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Typical Applications

  • Flare lines
  • Steam piping
  • Girth welds, elbows, tees
  • Chemical processing lines
  • Anywhere elevated temperatures are of concern or expected


  • Inspectable with radiography
  • High temperature rating with an ambient cured epoxy
  • No heating or post-curing required
  • Full factory support
  • Code compliant
  • Patented polymer inspection capability
  • Non-woven architecture allows for scalable increases in ply thickness

Mechanical Properties

Tensile Strength 40:60 (Resin:Fiber)ASTM D303975°F (23°C)101,500 psi (700 MPa)
ASTM D303975°F (23°C)70,650 psi (487 MPa)
Tensile Strength 50:50 (Resin:Fiber)ASTM D303975°F (23°C)84,700 psi (584 MPa)
Tensile ModulusASTM D303975°F (23°C)4,538 ksi (31.3 GPa)
300°F (149°C)3,570 ksi (24.6 GPa)
Flexural StrengthASTM D79075°F (23°C)121,700 psi (839 MPa)
Flexural ModulusASTM D79075°F (23°C)4,180 ksi (28.8 GPa)
Hardness, Shore DASTM D224075°F (23°C)88
In-Plane Shear StrengthASTM D537975°F (23°C)13,055 psi (90 MPa)
Out-of-Plane Shear StrengthASTM D537975°F (23°C)5,202 psi (36 MPa)
In-Plane Chord Shear ModulusASTM D537975°F (23°C)629 ksi (4.3 GPa)
Out-of-Plane Chord Shear ModulusASTM D537975°F (23°C)159 ksi (1.1 GPa)
Lap ShearASTM D586875°F (23°C)3,700 psi (25.5 MPa)
CTEASTM E83175°F (23°C)6.79 µm/m°C
Heat Deflection Temperature (HDT)ASTM D64875°F (23°C)>515°F (268°C)

Physical Properties

Property Typical Test Value
Pot Life75 Minutes @ 75°F (24°C)
Working Time45 Minutes @ 75°F (24°C)
Gel TimeApprox. 161 Minutes @ 70°F (21°C)
Cure TimeApprox. 18 Hours @ 75°F (24°C)
Service TemperatureMax: Up to 300°F (149°C)
Application Temperature50° to 200°F (5° to 93°C)
Solids Content100%
Shelf Life12 Months with recommended
storage methods