High Performance Ultrasonic Couplant

Soundsafe® is a high-performance, general-purpose ultrasonic couplant for flaw detection and sizing, thickness gauging, flow metering and acoustic emission testing.

This medium viscosity gel couplant is well known for its outstanding performance, excellent corrosion protection, thixotropic properties and comprehensive range of specifications and approvals.

Soundsafe is Pratt & Whitney approved and meets nuclear grade specifications for halogen and sulfur levels.


  • Wide range of specifications and approvals
  • Great surface wetting for fast, even coverage 
  • Thixotropic gel
  • Non-toxic, non-irritating formula
  • Increased acoustic impedance reduces surface noise
  • Clings well to most vertical and overhead surfaces
  • Highest corrosion inhibition
  • Provides good transducer lubrication
  • Slower drying for extended inspection time
  • Nuclear grade
  • Aerospace approvals
  • Hydrogen embrittlement testing


Ordering Information

1 gal / 3.78 L20-901

5 gal / 18.9 L20-905

55 gal / 208 L drum20-955

Product Properties

NDT TypeUltrasonic Testing

CompatibilityMost composites and metals


Ideal ApplicationAcoustic emission testing, Aerospace inspections, Bridge pins, welds, anchor bolts, Fiberglass, Flaw detection, Flow metering, Nuclear inspections, Plastic, Rough surfaces, Thickness gauging, Titanium, Vertical or overhead surfaces, Weld inspection


StandardsAPI, ASME, ASTM F519, ASTM F945, AWS, Pratt & Whitney PMC 4385, PWA 36604


Related Products

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  • Echogel

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