Sono 900 - Discontinued


Discontinued August 1, 2018 - Replaced by Sono 1100

Magnaflux Ultrasonic Couplant Sono 900

High-Temperature Ultrasonic Couplant

Sono 900 is a thick, gritty, stay-in-place couplant paste for high temperature thickness gauging and corrosion testing.

Recommended temperature range is 600 to 680°F / 316 to 360°C.


  • High viscosity paste adheres well to transducers at high temperatures
  • Excellent corrosion inhibition  
  • Specifications 
  • Container Size & Part Number 
  • Applications 
  • Use Recommendations 


  • API
  • ASME
  • AWS

Container Size & Part Number

4 fl oz / 118 mL tube              40-T04

1 gal / 3.78 L cubitainer         40-901


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Defect location: subsurface

Ideal for:

  • Thickness gauging
  • Corrosion testing
  • High temperature ultrasonic testing


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Use Recommendations

NDT Method: Ultrasonic Testing

Required Equipment: UT equipment, transducer

Temperature Range: 600 to 680°F / 316 to 360°C

Compatibility: Most metals


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