Pyrogel 7

Wide Temperature Range Ultrasonic Couplant

Pyrogel® is a broad temperature range couplant for thickness gauging, flow metering, acoustic emissions testing and flaw detection/sizing. These products contain no polymers and resists drying, making them an excellent choice for long term flow metering applications.

Pyrogel comes in two different viscosities, Pyrogel 7 which is a very thin, flowable liquid and Pyrogel 100 which is a thick gel.

Pyrogel 7 recommended temperature range is -50 to 730°F / -45 to 388°C.


  • Broadest temperature range
  • Non-drying for long-term coupling or extended inspection time
  • Good choice for long-term flow metering
  • Excellent long-term corrosion inhibition

Ordering Information

1 gal / 3.78 L21-901

Product Properties

NDT TypeUltrasonic Testing

ViscosityThin Liquid

CompatibilityMost composites and metals


Ideal ApplicationAcoustic emission testing, Corrosion testing, Flaw detection, High temperature ultrasonic testing, Long-term coupling, Long-term flow metering, Low temperature locations, Pipes, tubular goods, casing and connections, Pressure vessels, Thickness gauging, Transmission pipes


StandardsAPI, ASME, AWS


Related Products

  • Pyrogel 100

    A thick gel wide temperature range couplant for thickness gauging, flow metering, acoustic emissions testing and flaw detection/sizing at -50 to 805°F / -45 to 429°C

  • Sono 600

    Multi-purpose couplant with a wide temperature range for flaw detection, thickness gauging and acoustic emission testing from 0 to 700°F / -18 to 371°C

  • Sono 1100

    High-temperature couplant for thickness gauging ultrasonic inspections reaching from 700 to 775°F / 371 to 413°C

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