
NM01SX1
Choose Quantity
Echo Ultrasonics SoniX™ UT Ambient Temperature Ultrasonic Couplant, 1 gal (3.8 L) with Bottle and Dispensing Cap
SKU: SX1
A low-cost, general-purpose ultrasonic couplant with a strong, lubricating, water-soluble coupling film, salt-stable and glycerin-free, supplied in a 1 gallon container with a refillable application bottle and dispensing cap.

| 18–120°F-8 to 50°C range | Glycerin-freeFAA-AC #25-29 | Salt stableWon't thin | 1 gal3.8 L with bottle |
Echo Ultrasonics SoniX™ UT is the best choice for a low-cost, general-purpose ultrasonic couplant. It provides a strong, lubricating, water-soluble coupling film for flaw detection and thickness gauging at ambient temperatures from 18°F to 120°F (-8°C to 50°C), with a slow drying time for extended inspections.
SoniX is completely salt stable, offers good ferrous corrosion inhibition and is compatible with most metals, plastics and composites. It's environmentally and operator friendly, with no formaldehydes, nitrates or nitrites. This 1 gallon (3.8 L) container comes with a refillable application bottle and dispensing cap for easy, controlled application.
Key Features
Strong coupling film
SoniX forms a strong, lubricating film between the transducer and the test surface, giving reliable sound transmission for flaw detection and thickness gauging.
Slow drying, fast wetting
Reduced surface tension lets SoniX wet the surface quickly, and its slow drying time keeps the couplant in place for extended inspection times.
Completely salt stable
SoniX won't thin on corroded surfaces, in marine environments, or on highway infrastructure exposed to de-icing salts.
Corrosion inhibition and compatibility
Good ferrous corrosion inhibition protects steel parts, and the formula is compatible with most metals, plastics and composites.
Meets industry standards
SoniX complies with ASTM F519, the ASME Boiler & Pressure Vessel Code (T-533), NAVSHIPS 250-1500 and FAA-AC #25-29 (glycerin-free).
Operator and environment friendly
It's non-flammable, contains no formaldehydes, nitrates or nitrites, and is not hazardous under OSHA HazCom 2012 criteria. It cleans up with water.
Specifications
| General | |
| Manufacturer | Echo Ultrasonics |
|---|---|
| Product | SoniX™ UT ambient temperature ultrasonic couplant |
| SKU | SX1 |
| Packaging | 1 gal (3.8 L) container with one refillable bottle and dispensing cap |
| Box dimensions (L × W × H) (estimated) | 305 × 254 × 203 mm (12.0 × 10.0 × 8.0 in) |
| Shipping weight (estimated) | 4.5 kg (10.0 lb) |
| Properties | |
| Operating range | 18°F to 120°F (-8°C to 50°C) |
| Viscosity | Approximately 35,000 cps (Brookfield) |
| Halogens and sulfur | Less than 0.02% (200 ppm) |
| pH | 8 nominal |
| Appearance | Light green, high viscosity liquid; mild odor |
| Solubility | 100% in water |
| Freezing point | 18°F (-7.7°C) |
| Boiling point | Above 220°F (104°C) |
| Flammability | Non-flammable |
| Corrosion characteristics | Good ferrous corrosion inhibition; compatible with most metals, plastics and composites |
| Compliance & Removal | |
| Compliance | ASTM F519; ASME Boiler & Pressure Vessel Code (T-533); NAVSHIPS 250-1500; FAA-AC #25-29 (glycerin-free) |
| Removal | Wash with water or wipe with paper or a cloth rag. The polymer forms a film if allowed to dry, so remove before drying, or afterward by pressure washing or brushing under running water. |
What's in the Box
- Echo Ultrasonics SoniX™ UT couplant, 1 gal (3.8 L)
- One refillable application bottle
- Dispensing cap
Contents can vary by package, so contact us to confirm what ships with your order.
Need a different couplant?
For a broader temperature range of -10°F to 220°F, see Echo SuperSoniX. For very rough or corroded surfaces, see Echo Z+. For very cold or warm inspections and phased array work, see EchoPure. For high-temperature inspections, see Echo's HiTempco+ and VersaSonic.
Applications
| ✓ Ultrasonic thickness measurement | ✓ Flaw detection |
| ✓ Weld inspection | ✓ Corrosion monitoring |
| ✓ Marine and offshore structures | ✓ Bridges and highway infrastructure |
| ✓ Pipelines, tanks and pressure vessels | ✓ Aerospace inspections requiring glycerin-free couplant |
Downloads
| ⬇ Product Data Sheet (PDF) | ⬇ Safety Data Sheet (PDF) |
About Echo Ultrasonics
Echo Ultrasonics of Bellingham, Washington, is known as "the couplant experts." It develops and manufactures ultrasonic couplants for general and specialty applications, including high-temperature, shear and guided wave, extremely rough surfaces, pencil probe, spot weld and extreme-cold inspections, along with high-temperature UT cables. Sonotech is a division of Echo Ultrasonics.


