IWE 3554 offers significant advantages over existing 'visible' dye-based fluorescent leak tracer systems in that it is # Invisible to the human eye under normal white light conditions. IWE 3554 is only visible using specially tuned ultraviolet (UV) light. # Lower toxicity than traditional tracer dyes, reducing 'in use' Health and Safety concerns and the negative impact on local marine life. # No unsightly staining of seawater, rivers, watercourses etc. normally associated with the more traditional brightly coloured dyestuffs. # Tested and compatible with Aquatracker UV emission/fluorescence instruments. # Compatible with many IWE biocides and oxygen scavengers.