Ensures there are no air gaps between probe and the surface.

Available either in a 1 litre tub or a 118ml flip-top bottle (ideal for carrying on site). This ultrasonic couplant is a thixotropic, water-based, blue gel that is non-hazardous and essential when taking thickness measurements (although not needed underwater) as the couplant ensures that there are no air gaps between the probe and the surface being measured.

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