TSI Supercool TD8 Total Dye 8 oz self-measure bottle — UV-reactive leak tracer for automotive & hydraulic fluids

TSI Supercool TD8 Total Dye is an 8-ounce, self-measure bottle of synthetic UV-reactive dye formulated to trace leaks in motor oil, diesel, gasoline, transmission fluid, brake fluid, power steering fluid and hydraulic systems.

Designed for professional technicians and DIYers, this concentrated dye blends with a wide range of vehicle and equipment fluids to help locate leaks quickly when viewed under a UV lamp. The self-measure bottle dispenses accurate 1/4-ounce doses per quart, so you can add the correct amount without extra measuring tools. The formula performs best in clean oils and fuels and becomes visible only under UV illumination, minimizing interference with routine inspections.

How do I use TD8 Total Dye safely and accurately?

Adding TD8 is straightforward: determine the system capacity, calculate the required dye volume at 1/4 ounce per quart, and pour directly from the self-measure bottle to avoid spills. After circulating the fluid through normal operation, inspect suspected areas with a handheld UV lamp in a darkened environment for bright fluorescence.

• Pour measured 1/4 oz per quart directly from bottle’s dosing chamber.
• Run engine or operate system to circulate dye throughout lines.
• Use UV lamp in low light to reveal leaks as bright fluorescence.
• Clean excess dye and document leak locations for repair.

Which fluids and systems are compatible with this dye?

TD8 Total Dye is formulated to mix with a broad variety of automotive and industrial fluids, including motor oils, diesel and gasoline, transmissions, power steering, brake fluid and hydraulic oils. It’s optimized for visibility in clean oils and fuels, and it can be used across light- and heavy-duty vehicles as well as stationary equipment.

• Motor oils, both gasoline and diesel engines.
• Automatic and manual transmission fluids.
• Power steering, hydraulic and brake fluids.
• Compatible with gasoline and diesel fuel systems for leak tracing.

Will TD8 affect fluid performance or vehicle components?

TD8 is a synthetic U/V dye designed for trace applications and is used in very small concentrations (1/4 ounce per quart), minimizing interaction with fluid properties. When used as directed it should not alter lubrication or hydraulic performance; however, follow manufacturer recommendations for systems with specific additive sensitivities and always use the correct dose.

• Mixes at low concentrations to avoid altering fluid chemistry.
• Intended for diagnostic use—remove and repair leaks as needed.
• Test in an inconspicuous area or consult OEM guidance for special systems.
• Best results in clean fluids; heavy contamination can reduce visibility.

Who is this for? TD8 Total Dye is ideal for automotive technicians, fleet maintenance teams, and informed DIY mechanics who need a reliable, easy-to-dose UV dye for leak detection across engines, transmissions, fuel systems and hydraulics. Its compact self-measure bottle is convenient for shop cabinets or service vans and saves time when diagnosing intermittent or hard-to-find leaks. Choose TD8 when you want a concentrated, U.S.-made tracer that integrates with common vehicle fluids and produces clear fluorescent evidence under UV inspection.

Product details: 8-ounce self-measure bottle; synthetic UV-reactive dye; mix ratio 1/4 ounce per quart; most effective in clean diesel and engine oils; made in the United States. Package dimensions: height 15.24 cm, length 4.064 cm, width 6.858 cm.