Alcon Pro-System Rotor Temperature Paint Kit

The Alcon TEM.100440 Pro-System Rotor Temperature Paint Kit is a professional-grade thermochromic paint system engineered to give drivers and brake engineers a permanent, visual record of peak disc rotor temperatures after every track session or performance drive. Three indicator paints, each formulated to a precise color-change threshold, map the full brake operating spectrum from 0 to 800 degrees C (0 to 1471 degrees F) in a single application. Compatible with cast iron, coated, and carbon-ceramic rotors on any vehicle, the TEM.100440 removes guesswork from pad compound selection, cooling decisions, and brake system diagnostics.

Why Brake Temperature Data Changes Everything

Selecting the wrong brake pad compound for your actual rotor temperature range is the single most common cause of brake fade, accelerated rotor wear, and inconsistent pedal feel at the track. Factory data sheets give you a compound's rated temperature range, but they cannot tell you what temperatures your specific vehicle, track, and driving style are actually generating. The TEM.100440 closes that gap. Apply the three indicator paints before a session, drive, and let the permanent color changes tell you exactly which thermal zone your brakes operated in. Green unchanged means normal operating temps. Green turned white means you crossed into heavy-duty territory. Orange turned yellow means extreme track conditions. Red turned white means immediate attention is required before the next session.

The paints are triggered only after 10 continuous minutes at or above each threshold, which eliminates false positives from brief transient spikes and gives you a reading that reflects true sustained thermal exposure.

Key Features

• Three thermochromic paints covering the complete brake disc temperature spectrum from 0 to 800 degrees C (0 to 1471 degrees F)
• Green paint changes from green to white at 458 degrees C (856 degrees F) — indicates the upper boundary of normal street and performance driving
• Orange paint changes from orange to yellow at 550 degrees C (1022 degrees F) — indicates heavy-duty or aggressive track use requiring a higher-rated compound
• Red paint changes from red to white at 630 degrees C (1166 degrees F) — indicates extreme motorsport thermal exposure requiring immediate review of compound, cooling, and rotor condition
• Color changes are permanent and irreversible, providing a reliable post-session peak temperature record
• 10-minute sustained threshold eliminates false readings from brief temperature spikes
• Compatible with cast iron, carbon-ceramic, drilled, slotted, and coated disc rotors on any vehicle make or model
• Paint dries to touch in 15 to 30 minutes, adheres without priming, and removes cleanly with the included solvent
• Genuine Alcon Pro-System product (MPN TEM.100440), built to the same quality standards as Alcon's full race brake systems

Specifications

What's Included

• 1 bottle of Green temperature indicator paint (changes to white above 458 degrees C / 856 degrees F)
• 1 bottle of Orange temperature indicator paint (changes to yellow above 550 degrees C / 1022 degrees F)
• 1 bottle of Red temperature indicator paint (changes to white above 630 degrees C / 1166 degrees F)
• 3 brush applicators (one dedicated applicator per paint color)
• 1 bottle of solvent/thinner for paint removal and brush cleaning
• Temperature color reference chart
• Application instructions

About Alcon Pro-System

Alcon has been engineering brake systems for the world's most demanding motorsport applications since 1983. Founded by racing brake specialist John Moore, Alcon supplied brakes to Audi Sport's Group B Quattro program in its first year and has since accumulated over 18 driver's championships and 15 manufacturer's titles across WRC, F1, IndyCar, NASCAR, Formula E, and GT racing. Alcon USA was established in 1994, and in 2017 Alcon acquired Pro-System Brakes, the respected North Carolina-based motorsport brake specialist, expanding its US operation across performance aftermarket, off-road, defense, and security vehicle applications. Every Alcon Pro-System product is held to the same exacting standards that equip factory Aston Martin, Bentley, McLaren, and Ford GT racing programs.

Frequently Asked Questions

It tells you the highest sustained temperature your brake rotors reached during a session. Each of the three indicator paints permanently changes color when the rotor holds a specific threshold for at least 10 minutes, giving you a clear, documented record of peak thermal exposure across the full operating spectrum.

After the vehicle cools, inspect each painted segment. Green unchanged means peak temps stayed below 458 degrees C (856 degrees F), which is the normal range for street and performance driving. Green turned white means you exceeded 458 degrees C. Orange turned yellow means you exceeded 550 degrees C (1022 degrees F). Red turned white means temperatures reached above 630 degrees C (1166 degrees F), which signals severe thermal exposure and requires an immediate review of your compound selection and brake cooling.

No. The thermochromic paint is applied to the outer edge or face of the rotor in a thin coat and does not contact the braking surface. It does not affect stopping performance or rotor integrity. The included solvent removes it cleanly without abrading or marking the rotor finish.

Yes. The kit is compatible with cast iron, carbon-ceramic, coated, drilled, and slotted rotors. Clean and degrease the application area thoroughly before applying to ensure proper adhesion and accurate readings.

Using all three simultaneously gives you a complete thermal map in one session. Each paint covers a different temperature range, and they work together to tell you not just whether your brakes got hot, but exactly how hot. One color alone tells you only whether a single threshold was crossed, not the full picture needed for compound and cooling decisions.

Allow approximately 15 to 30 minutes for the paint to dry to touch before driving. Ambient temperature and humidity will affect dry time. Apply each color to a separate, clearly defined segment of the rotor circumference so the three readings remain distinct after the session.

Sustained heat. Each paint requires the rotor to maintain the threshold temperature for a minimum of 10 continuous minutes before the color change is triggered. This design deliberately filters out short transient temperature spikes, so the reading reflects true operating thermal exposure rather than a one-time peak during hard braking.

Apply the included solvent to a disposable cloth or rag and wipe the painted segment clean. The paint releases from the rotor surface without scrubbing or abrasion. Dispose of the cloth safely as the solvent is flammable.

Clean each brush thoroughly with the included solvent immediately after use before the paint dries fully. Use only the dedicated brush for each color to prevent cross-contamination between the three paints, which would compromise the accuracy of your temperature readings.

It complements them rather than replaces them. Temperature paint cannot capture temperature over time or detect transient peaks below the 10-minute threshold, but it provides a permanent, tool-free visual confirmation of sustained peak temperatures that is practical for any driver or builder without specialized instrumentation. For race teams with data acquisition, the TEM.100440 serves as a low-cost cross-check and a useful tool during pre-season setup and compound selection testing.

Application Instructions

1. Allow rotors to cool completely and ensure the vehicle is safely supported before beginning.
2. Clean the outer circumference of the rotor with brake cleaner or the included solvent to remove all grease, oil, and brake dust.
3. Allow the cleaned surface to dry completely before applying paint.
4. Apply each of the three indicator paints to a separate, adjacent segment approximately 25mm wide around the outer rotor circumference using the dedicated brush for each color.
5. Allow paint to dry to touch, approximately 15 to 30 minutes depending on conditions, before driving.
6. Drive under the test conditions you want to evaluate, such as a track session, performance street drive, towing run, or autocross event.
7. After the session, allow the vehicle and rotors to cool completely before inspecting the painted segments.
8. Compare each segment to the included temperature color reference chart and record your findings.
9. To remove paint, apply the included solvent to a disposable cloth and wipe the painted area clean.
10. Repeat the process with fresh paint for subsequent test sessions.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.