Our exclusive dual-viscosity formula allows SCAN to be applied as a gel and scan as a fluid. For medical ultrasound procedures when a less viscous gel is desired. Features Acoustically correct, provides superior transmission of ultrasound waves Completely aqueous, will not stain clothing, damage equipment or irritate skin Acoustically correct for the broad range of frequencies used Used and recommended by leading manufacturers of ultrasound equipment worldwide Hypoallergenic, bacteriostatic No formaldehyde