Aqua Sonic 100 by Parker Labs, blue gel
Aqua Sonic 100 Ultrasound Transmission Gel
Acoustically correct for the broad range of frequencies used. Completely aqueous, will not stain clothing or damage transducers. Unique "can't be copied" formula is hypoallergenic, bacteriostatic, non-sensitizing and non-irritating. No formaldehyde and not a spermicide. Used and recommended by leading manufacturers of medical ultrasound equipment worldwide.