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M-GLO™ Fluorescent Leak Detection Dye


Finds small leaks in crude MCHM (4-methylcyclohexanemethanol) chemical storage tanks before they can lead to catastrophic spills! Allows easy detection and tracing of chemical spills in soil and water, quickly determining and limiting the extent of any possible contamination. Ideal as part of a comprehensive preventive maintenance program!



  • User Friendly − Just add a small amount of M-GLO™ fluorescent dye to the chemical storage tank, and circulate it thoroughly to mix. When the tank and piping are scanned with a high-intensity long-wave UV (365 nm) inspection lamp, all leak sites will glow bright yellow.
  • Versatile − Pinpoints the exact source of even the smallest, most elusive leaks!
  • Cost Effective − Highly concentrated formulation. One gallon (3.8 L) of dye treats 6,400 gallons (24,226 L) of crude MCHM.
  • Highest Quality – Dye is filtered down to 2 microns
  • Several Sizes – Choice of 1-gallon (3.8 L), 5-gallon (18.9 L), 55-gallon (208.2 L) or 264-gallon (1,000 L) containers
U.S. Patent No. 6,165,384;
additional patents pending

M-GLO fluorescent leak detection dye is ideal for finding crude MCHM chemical leaks
in holding tanks as well as tracing contamination spills in soil and water


When viewed with the naked eye, the clear, colorless appearance of crude MCHM is virtually undetectable in soil or water. After adding a small amount of M-GLO fluorescent dye, the chemical will glow a bright yellow color under high-intensity long-wave UV (365 nm) light, making leaks and spills much easier to trace!




In January 2014, approximately 10,000 gallons of crude MCHM chemical leaked from a holding tank at a storage facility into the ground near the Elk River in West Virginia, contaminating both the river and the public water supply downstream from the plant. A “do-not-use” advisory was issued leaving at least 300,000 residents in nine counties without access to potable water for up to 10 days.


While the legal, financial, environmental and health-related impact has yet to be fully calculated in the aftermath of this devastating chemical spill, the initial clean-up costs to the business are known to have exceeded $800,000 in the first week alone. Fines and litigation costs have since forced the company to declare bankruptcy.


The renewed demand for stricter safety and environmental regulations in the wake this incident will require chemical storage facilities to implement more comprehensive leak detection and preventive maintenance programs. That’s why we developed M-GLO fluorescent leak detection dye!


When added to MCHM chemical storage tanks, M-GLO fluorescent dye provides fast and easy detection of even the smallest leaks. In the event of a spill, M-GLO dye can also help trace its path and limit the extent of contamination into soil and water.


OPTIMAX 365 (P/N OPX-365)


UV LED inspection flashlight kit

Comes complete with AC and DC cord sets, rechargeable NiMH battery, belt holster, UV absorbing glasses and a rugged carrying case.



Battery-operated UV MDL inspection lamp kit

Comes complete with battery pack, AC and DC cord sets, UV-absorbing and fluorescence-enhancing glasses and large rugged carrying case.




M-GLO dye fluoresces bright yellow
under long-wave UV (365 nm) light