EchoPure is the couplant of choice for Phased Array UT Inspection (PAUT).  EchoPure improves defect reproducibility by eliminating dry spots under the wedge and the resulting noise and artifacts.

EchoPure complies with P91 steel inspection requirement for a water-free couplant.

EchoPure is an ideal couplant for very cold inspection (liquid gas piping and refrigerant lines) and will not frost or attenuate at temperatures as low as -60°F.

EchoPure is excellent for high temperature use such as warm welds up to 350°F and on pipe in the desert summer sun, where slow evaporation and long inspection windows are desired.

With its low toxicity, EchoPure is a good choice for inspection in food processing plants.

EchoPure is the safest commercial NDT ultrasonic couplant.  EchoPure is manufactured using only ingredients that are Generally Recognized as Safe (GRAS) as food additives by the US FDA.

EchoPure is a water-free, water-soluble ultrasonic couplant that has a broad operating range, is slow drying and provides excellent transducer lubrication.

Operating range: -60 to 350°F (-51 to 177°C)

Four viscosities: fluid, low, medium and high

Strongest coupling film available.

Very slow drying:  Drying time is days or weeks.

Salt stable.  Does not thin with corrosion, roadway or marine salts.

Better multi-metal compatibility than most UT couplants.

Does not contain Glycerin

Environment and operator friendly: no formaldehydes, phosphates, silicones, fragrances, nitrates, nitrites, heavy metals, azoles, antimicrobials or fungicides

Safe: all ingredients are approved for incidental food contact

Water soluble

Excellent acoustic properties

Mild ferrous corrosion inhibition less corrosive than water alone

Removal: Wipe with a rag or water wash


  • Low: low viscosity fluid
  • Medium: high viscosity fluid
  • High: stiff gel like fluid

Operating Temperature: -60°F to 350°F (-51°C to 176°C)

Auto Ignition Temperature: 700°F / 371°C

Halogens and Sulfur: less than 50ppm


  • P91 Steel Inspection – meets requirement for a water-free couplant
  • ASTM F519
  • ASME Boiler & Pressure Vessel Code (T-533)
  • NAVSHIPS 250-1500
  • FAA-AC # 25-29 (glycerin-free)
  • Nuclear grade (less than 50 ppm Halogen & Sulfur)


Environment: The most environmentally friendly commercial ultrasonic couplant available.



1 gal / 3.8 liter, LOW viscosity


5 gal / 18.9 liter, LOW viscosity


55 gal / 208 liter drum LOW viscosity


Carton of (12) 4 oz / 118 ml bottles   MEDIUM viscosity 


1 gal / 3.8 liter, MEDIUM viscosity


5 gal / 18.9 liter, MEDIUM viscosity


55 gal / 208 liter drum, MEDIUM viscosity


3.2-oz. dispensing pump, HIGH viscosity


1 gal / 3.8 liter, HIGH viscosity


5 gal / 18.9 liter, HIGH viscosity


55 gal / 208 liter drum, HIGH viscosity