Ultragel II

High Performance Ultrasonic Couplant

Ultragel II is a premium, medium-viscosity thixotropic gel designed for ultrasonic testing across a wide range of applications, including flaw detection, thickness gauging, acoustic emission testing, and flow metering. It combines exceptional surface wetting, industry-leading corrosion protection, and superior acoustic properties in a silicone- and glycerin-free, non-toxic formula approved for nuclear and aerospace use.

Features

Clings effectively to vertical and overhead surfaces
Fills depressions on rough or corroded surfaces
Offers the highest level of corrosion protection within the general-purpose category
Slow drying rate supports extended inspection periods
Provides excellent transducer lubrication
Elevated acoustic impedance reduces surface noise
Broad compliance with nuclear and aerospace standards, including Pratt & Whitney
Thixotropic gel ensuring stable application
Compatible with hydrogen embrittlement testing environments

Applications

Flaw detection
Flaw sizing
Thickness gauging
Acoustic emission testing
Flow metering
Aerospace inspections
Nuclear inspections
Inspection on rough surfaces
Turbine blades
Aircraft wheel maintenance
Vertical or overhead surface inspections
Weld inspection

Technical Data

Property	Specification
Relative Viscosity	~4 (on a 0–10 viscosity scale: 0 = water, 10 = thick paste)
Actual Viscosity	~80,000 cps (Helipath spindle E @ 1.5 rpm)
Corrosion Inhibition Rating	90 (Magnaflux scale; best in general-purpose group)
Acoustic Velocity (long)	1.62 × 10⁵ cm/s
Acoustic Impedance	1.80 Mrayls
Acoustic Performance	85 (Magnaflux scale)
Water Solubility	90
Max Halogens/Sulfur	< 50 ppm
Regulatory Approvals	API, ASME, ASTM F519, ASTM F945, PWA 36604, AWS, Pratt & Whitney PMC 4384
NDT Method	Ultrasonic Testing
Compatibility	Most metals and composite materials
Temperature Range	–10 to 210 °F (–23 to 99 °C)
Packaging Sizes	12 fl oz (354 mL bottles), 1 gal (3.78 L), 5 gal (18.9 L), 55 gal (208 L)

Tags: acoustic emission testing, aerospace approved, corrosion protection, Flaw detection, general‑purpose couplant, non‑toxic couplant, nuclear grade, thickness gauging, thixotropic gel, ultrasonic couplant

Tags:

ultrasonic couplant, general‑purpose couplant, thixotropic gel, corrosion protection, flaw detection, thickness gauging, acoustic emission testing, nuclear grade, aerospace approved, non‑toxic couplant