Berg offers the UT-X ultrasonic couplant from Sonotech. This couplant is a powder useful for flaw detection & thickness gaging where corrosion inhibition is not of high interest. If you have any questions about the couplants that we offer, give us a call at 1-847-577-3980 or send an email to info@bergeng.com. Our knowledgeable staff is there to help and assist you.