Ultrasonic Coupling Powder | Water-Soluble NDT Gel MR757

Product Description:

MR®757 UT Coupling Powder
MR®757 is a cost-effective, high-performance ultrasonic coupling powder designed to mix easily with water to create a strong, gel-like medium for ultrasonic testing (UT). It forms a consistent, non-toxic film that adheres excellently to smooth, rough, vertical, and overhead surfaces—ensuring reliable acoustic transmission in various testing conditions. Its compact, lightweight format makes it ideal for both field and lab use.

Key Features:

• Customizable Viscosity: Easily adjusts from low to very high viscosity with simple water dilution.

• Quick Mixing: Forms a lump-free gel in under 5 minutes at ambient temperature.

• Self-Deaerating: Fast de-aeration for bubble-free application.

• Superior Acoustic Performance: Maintains acoustic integrity on all surfaces including vertical and overhead.

• Safe & Eco-Friendly:

  • Non-toxic and odorless

  • Free from sulphur, halogens, glycerin, silicone, and propylene glycol

• Blue Tracer Dye: For easy and consistent mixing

• Minimal Residue: Easily washable with water

• Excellent Corrosion Protection: Designed with advanced inhibitors for sensitive materials

• Thermal Stability: Performs consistently up to +75°C (167°F)

Ideal For:

• Weld inspection

• Steel billets and ship plates

• Corroded parts

• Power generation boiler components

• Large volume flaw detection

• Sub-surface and superfinished surface testing

Technical Specifications:

Usage Instructions:

• NDT Method: Ultrasonic Testing

• Carrier Media: Water

• Equipment Required: Ultrasonic testing machine, transducer

• Application Note: Adjust water ratio for desired gel consistency. For best results, use at room temperature.

Standards & Compliance:

• DIN EN ISO 25493

• ASME BPVC (T-533)

• FAA-AC #25-29 (Glycerin-free)

• AWS & API