Composite repair system with superior chemical compatibility for process piping.

Acid-Shield™ is a custom engineered, ASME PCC-2 4.1,4.2 compliant, composite repair system that utilizes chemically resistant, bi-directional fiberglass in conjunction with NRI’s Acid-Shield™ epoxy system. Acid-Shield™ was designed to repair corroded or damaged piping with harsh chemical services such as 98% sulfuric acid.



  • Repair external or internal corrosion defects on 98% sulfuric acid lines, flare lines, blow down lines, and chemical processing lines


  • Compatible with 98% sulfuric acid
  • Conformable for repairing elbow, tees, nozzles, welds and headers
  • Ambient-cured epoxy
  • Design conforms to ASME PCC-2, ASME B31, ISO TS 24817, DOT, API, and CSA Z662 standards for nonmetallic reinforcing and repair
Property Circumferential Direction Axial Direction
Tensile Modulus 5.5 Msi (37.7 GPa) 2.3 Msi (16.1 GPa)
Thermal Expansion Coefficient 7.1 ppm/°C (3.9 ppm/°F) 18.9ppm/°C (10.5 ppm/°F)
Property Typical Test Value
Laminate Thickness 0.018” (0.46mm)
Poisson Ratio 0.11
Glass Transition Temperature 280°F (138°C)
Shear Modulus of Polymer 139 ksi (0.96 GPa)
Shore D Hardness 87
Energy Release Rate 3.10 (543J/m2)
Lap Shear Strength 1,158 psi (7.98 MPa)

Coming soon