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Ultragel II

Ultragel II

SKU: SKU:25-912

Stock Status: In stock
Regular price $129.00 USD
Regular price Sale price $129.00 USD
Sale Sold out
Container size

High Performance Ultrasonic Couplant

Ultragel® II is an industry-leading, high-performance, ultrasonic couplant for flaw detection and sizing, thickness gauging, flow metering and acoustic emission testing.

Ultragel II is widely recognized as the industry’s most dependable and popular ultrasonic couplant. This general-purpose medium viscosity gel is known for its outstanding performance, excellent corrosion protection, thixotropic properties and comprehensive range of specifications and approvals.

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


  • Clings well to vertical and overhead surfaces
  • Fills in depressions in rough surfaces
  • Highest corrosion protection
  • Slow drying for longer inspection time
  • Provides good transducer lubrication
  • Increased acoustic impedance reduces surface noise
  • Wide range of specifications and approvals
  • Thixotropic gel
  • Great surface wetting
  • Nuclear grade
  • Aerospace approvals
  • Hydrogen embrittlement testing


  • API
  • ASTM F519
  • ASME
  • AWS
  • ASTM F945
  • ASTM F945 or PWA 36604, MCL E-205 Type II
  • Pratt & Whitney PMC 4384


Defect location: subsurface

Ideal for:

  • Flaw detection
  • Flaw sizing
  • Thickness gauging
  • Flow metering
  • Acoustic emission testing
  • Vertical or overhead surfaces
  • Weld inspection
  • Rough surfaces
  • Aerospace inspections
  • Nuclear inspections
  • Composites
  • Turbine blades
  • Aircraft wheel maintenance

Use Recommendations

NDT Method: Ultrasonic Testing

Required Equipment: UT equipment, transducer

Temperature Range: -10 to 210°F / -23 to 99°C

Compatibility: Most composites and metals

Container Size & Part Number

12 fl oz / 354 mL bottles (case of 12)    25-912

1 gal / 3.78 L cubitainer                         25-901

5 gal / 18.9 L cubitainer                         25-905

55 gal / 208 L drum                               25-955

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