CircleSafe 850A is an aerosol can of red particles and liquid Wetting Agent in water media. It is designed to be used with visible light inspection for detecting discontinuities during NDT and inspection. Higher particle concentration provides heavier indication buildup for easy detection. CircleSafe 850A can be further enhanced when used with a UV-A light or blue light (see our range of Spectroline lamps here). CircleSafe is packaged in a carbon dioxide propellant for odor-free, fume-free, non-combustible NDT and inspection.