Economical Ultrasonic Couplant

Echogel® 20 is an economical, basic-use couplant in medium-thick gel viscosity for ultrasonic inspections, like flaw detection/sizing and thickness gauging, where salt cake or metal corrosion salts are present. It provides good corrosion inhibition and resists viscosity breakdown on salt-caked boilers and other corroded materials.


  • Enhanced surface wetting to quickly cover oily or dirty surfaces
  • Maintains viscosity on corrosion or salt cake
  • Good corrosion inhibition
  • Silicone free
  • Hydrogen embrittlement testing

Ordering Information

1 gal / 3.78 L48-901

5 gal / 18.9 L48-905

55 gal / 208 L drum48-955

Product Properties

NDT TypeUltrasonic Testing


CompatibilityMost composites and metals


Ideal ApplicationCorroded parts, Flaw detection, Flaw sizing, High strength steel, Large volume flaw inspections, OCTG, Pipes, pipe components, connections and couplings, Power generating boilers, Small diameter pipe, Thickness gauging, Tubular goods, Weld inspection, When corrosion, salt, or salt cake is present


StandardsAPI, ASME, ASTM F519, AWS


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