AutoLine Pro Smoke Fluid Brightest UV (395 nm) for Automotive Leak Tracing - Low‑Residue, High‑Visibility

AutoLine Pro Smoke Fluid is a laboratory-developed, ultra-pure UV-visible smoke solution that produces the brightest post-vapor glow for fast, accurate automotive leak tracing.

This specially formulated smoke fluid was created for professional and DIY technicians who need a clean, long-lasting smoke source that fluoresces strongly under UV inspection. Developed and validated in a California lab, the formulation resists residue build-up and maintains intense fluorescence even after vaporization, with peak glow at a 395 nm wavelength. It works across most smoke machines and is optimized for common automotive leak detection tasks.

How does AutoLine Pro Smoke Fluid improve leak detection speed?

The concentrated UV tracer in this fluid makes even the smallest leaks visible quickly when scanned with a compatible 395 nm UV flashlight. Because the fluorescence remains bright after vaporization, technicians spend less time hunting for faint traces and more time making repairs.

• Brightest UV response at 395 nm for clear visual contrast
• High-concentration tracer ensures visibility through grime and lubricants
• Produces dense, steady smoke to reveal complex leak paths

Will this fluid harm my smoke machine or vehicle components?

AutoLine Pro was designed as an ultra-pure formulation to minimize deposits on internal surfaces and avoid the buildup that shorter-lived fluids can cause. Rigorous lab testing focused on equipment compatibility, so routine use with compatible machines is safe when instructions are followed.

• Ultra-pure blend reduces residue compared with non-reputable alternatives
• Tested for compatibility with most market smoke machines
• Not recommended for use with AutoLine Pro VENTUS machine — use VENTUS Fluid for that model

What systems and scenarios is this fluid suitable for?

This smoke fluid was formulated for a wide range of automotive diagnostic tasks, from EVAP system checks to intake and exhaust leak tracing. It’s effective on body seams, cooling systems, turbo/supercharger interfaces, EGR ports, and engine block inspections.

• EVAP, vacuum, intake, and exhaust leak testing
• Turbo and supercharger seals, EGR, cooling systems, and bodywork
• Useful for both shop diagnostics and mobile service work

How long does one bottle last and what equipment does it work with?

Each bottle delivers up to 700 minutes of continuous, steady smoke output under typical use, making it a cost-effective option for frequent testing. The fluid is compatible with AutoLine Pro smoke testers and most other brands, except use the specified VENTUS Fluid for the VENTUS unit.

• Up to 700 minutes of continuous smoke per bottle
• Works with AutoLine Pro testers and most third-party smoke machines
• Peak fluorescence at 395 nm — choose a matching UV flashlight for best results

Who is this for: AutoLine Pro Smoke Fluid is built for professional mechanics, automotive diagnosticians, fleet maintenance teams, and serious DIYers who require a reliable, high-visibility tracer that won’t foul equipment. If you perform frequent leak tracing across EVAP, vacuum, intake, exhaust, turbo systems, or bodywork, and you use a non-VENTUS smoke machine or an AutoLine Pro tester, this fluid gives bright, long-lasting smoke and strong UV fluorescence to speed diagnosis and reduce repeat inspections.