UT-X® Powder Ultrasonic Couplant Powder UT-X® Powder is a cost-effective couplant powder for flaw detection and thickness gaging applications where ferrous corrosion inhibition is required. UT-X Powder retains viscosity on salt caked boiler tubes, corroded pipe, structural steel, steel billets, welds and ship plate. Mixed with water at the inspection site, its compact and lightweight packets are easy to transport to a job site or to store as an emergency couplant for unanticipated shortages. Benefits Salt resistant Environmentally benign formula Fast, lump-free mixing Concentrated to reduce shipping cost and storage space No dyes, fragrance or glycerin Low skin irritation potential Short-term corrosion protection Economical option