Auto mechanics were exposed to asbestos mainly through brake and clutch work. For decades, brake pads, brake shoes, and clutch discs contained asbestos because it withstands heat and friction. Each time a mechanic ground down a brake shoe, sanded a pad to fit, or used compressed air to clear dust from a brake drum, asbestos fibers could drift into the shop air. According to the National Cancer Institute, most mesothelioma cases are thought to be caused by asbestos exposure, and asbestos-related illness can take decades to appear (NCI asbestos fact sheet).
How Brake and Clutch Repair Released Asbestos Dust
The National Cancer Institute lists brake shoes and clutch pads among automotive products that have historically contained asbestos, alongside building materials such as insulation and cement (NCI). In a new brake pad, the asbestos is bound into the material. The hazard came from wear. As pads and shoes wore down, they shed fine dust that collected inside the brake drum and on the backing plate. Most brake jobs began by opening that drum, which released the dust inside.
Clutch work carried a similar risk. The clutch disc sits between the flywheel and the pressure plate and wears down over time. When a mechanic pulled a transmission and opened the bell housing, the dust that had built up inside came out with it.
Common Auto Shop Practices That Increased Asbestos Exposure
Several routine habits pushed that dust directly into a mechanic’s breathing zone:
- Blowing out brake drums and backing plates with an air hose is a common practice in many shops
- Grinding or arcing new brake shoes on a bench grinder so they matched the drum
- Beveling or drilling brake linings and clutch facings
- Dry-sweeping the shop floor, which stirred settled dust back into the air
None of this seemed dangerous at the time. It was everyday work, usually done without a respirator and often in a closed bay during colder months. The U.S. Environmental Protection Agency later published best practices for preventing asbestos exposure among brake and clutch repair workers, which specifically warn against methods like these.
Pennsylvania Auto Repair Shops and Garages With Asbestos Exposure
In Pennsylvania, this exposure was spread across thousands of workplaces rather than one large plant. It included dealership service departments, independent garages, gas stations that offered brake service, and fleet and bus garages that maintained municipal vehicles, delivery trucks, and school buses. Mechanics who worked on heavy trucks and buses may have faced greater exposure, since larger vehicles use larger brakes that can hold more dust. Some industrial mechanics also worked in Pennsylvania plants and mills, where insulated equipment could increase their exposure; our Pennsylvania asbestos exposure sites pages cover those facilities. Mechanics appear in our occupations with asbestos exposure index, along with HVAC technicians and factory workers.
Secondary Asbestos Exposure: Did Brake Dust Follow Mechanics Home?
In many cases, it could. Brake dust settled on coveralls, boots, and hair, and it traveled home in the car. The National Cancer Institute notes there is some evidence that family members of heavily exposed workers face a higher risk of mesothelioma, likely from fibers carried home on clothing, shoes, skin, and hair (NCI). If your spouse or parent worked as a mechanic and you have been diagnosed with an asbestos-related disease, that history may matter. Learn more on our page about secondary asbestos exposure.
Mesothelioma Claims for Mechanics and Their Families
A mesothelioma diagnosis many years after garage work fits the way this disease typically develops. The key legal question is which companies made the brake, clutch, and gasket products that a mechanic used. Many of those manufacturers have compensation options available, including asbestos bankruptcy trusts, which the U.S. Government Accountability Office reported held tens of billions of dollars in combined assets (GAO-11-819). A claim generally focuses on product manufacturers rather than a former employer. Every state sets filing deadlines, and those deadlines can be short, so it helps to gather work history while the person diagnosed can still share it in their own words.
Get a Free Mesothelioma Case Review
If you or a family member worked as a mechanic and is now facing a mesothelioma diagnosis, start with a free case review. We can help trace the products and build the timeline together.