TSI Supercool TD8 Total Dye 8 oz self-measure bottle — UV leak tracer for motor oil & fuels

TSI Supercool TD8 Total Dye is an 8-ounce self-measure bottle of synthetic UV-detectable dye formulated to trace leaks in motor oils, fuels, and most vehicle fluids.

Designed for technicians and DIYers, this concentrated dye mixes at 1/4 ounce per quart and becomes visible under UV light to help locate the source of leaks in engine oil, diesel, gasoline, transmission fluid, brake fluid, hydraulic systems and power steering systems. Packaged in a self-measure bottle for accurate dosing, the TD8 formula blends with clean oils most effectively and is manufactured in the United States.

How do I use TSI Supercool TD8 to find a leak quickly?

Add the recommended dose to the fluid reservoir, operate the vehicle or system to circulate the dye, then inspect suspected areas with a UV light. The dye fluoresces under UV illumination, highlighting the entry point and flow path of escaping fluid.

• Mix ratio: 1/4 ounce (about 7.4 mL) per quart of fluid for standard tracing.
• Best results in clean engine oil and diesel—contaminants can mask fluorescence.
• Circulate system briefly after adding to distribute evenly before inspection.
• Use a handheld UV lamp for targeted, portable detection in garage or field.

Which vehicle fluids are compatible with this dye?

TD8 is formulated for broad compatibility across common automotive and industrial fluids, allowing a single product to service many leak-tracing needs. It is suitable for motor oil, diesel, gasoline, hydraulic fluid, transmission fluid, power steering fluid and brake fluid.

• Motor oil and diesel: particularly effective for clear fluorescence.
• Transmission and power steering fluids: mixes and circulates for tracing.
• Hydraulic systems and brake fluid: works where circulation and UV access are possible.
• Not intended as a repair additive—use only as a diagnostic tracer.

What safety and handling steps should I follow when applying TD8?

Handle the dye with basic workshop safety: avoid skin and eye contact, work in a ventilated area, and keep containers sealed when not in use. Dispose of any excess or contaminated fluids according to local regulations—TD8 is a diagnostic dye, not a service chemical.

• Wear gloves and eye protection to prevent staining and irritation.
• Avoid ingestion or prolonged skin contact; wash affected areas promptly.
• Store upright at room temperature away from direct sunlight and children.
• Follow local rules for disposal of dyed vehicle fluids and rags.

Who is this product for? TSI Supercool TD8 Total Dye is aimed at mechanics, fleet maintainers, and knowledgeable DIY vehicle owners who need a reliable UV tracer to pinpoint leaks fast. If you perform diagnostic work on engines, transmissions, fuel systems, or hydraulics and want a single, concentrated dye that mixes accurately and lights up under UV, this self-measure 8-ounce bottle streamlines dosing and inspection without specialized training. It is not a fluid additive for performance enhancement or a permanent repair—use TD8 as a targeted diagnostic tool alongside standard repair procedures.