This white fluro dye from Spectroline’s OIL-GLO ULTRA range glows a bright blue-white under a UV (365 nm) lamp. The colour is easy to tell apart from yellow and green, so it is often used as the extra colour where a site runs several oil systems side by side, such as hydraulics, gearboxes and compressors on one line.

Use it in mineral or synthetic hydraulic fluids, compressor oils, engine oils and gearbox oils. Once the dye has circulated, scan the equipment with a UV lamp and any leak glows at its exact source.

White is designed for UV lamps rather than violet light. Filtered to 2 microns, co-solvent free and NSF registered. UV-absorbing safety glasses are required.