Gasket Products Asbestos Exposure

Gasket Products and Historical Asbestos Use

Gaskets create seals between mating surfaces to help prevent leakage of steam, gases, oil, chemicals and other fluids. Historically, asbestos-containing gasket materials were used in many high-temperature and high-pressure applications because asbestos could reinforce the sealing material while resisting heat and chemical attack.

Some asbestos gaskets were manufactured as compressed sheet material that workers cut to fit. Other products were preformed for specific engines, pumps, valves, boilers or piping systems. EPA records also describe beater-add gaskets that incorporated asbestos fibers into elastomeric binders and spiral-wound gasket sealing components.

The presence of an older pump, valve, engine or boiler does not prove that its gasket contained asbestos. Maintenance histories often involved many replacement products over decades.

Types of Gaskets That May Have Contained Asbestos

Depending on manufacturer, application and year, historical asbestos-containing gasket products may have included:

• compressed asbestos sheet gaskets;
• flange gaskets used in piping systems;
• pump casing and cover gaskets;
• valve bonnet and body gaskets;
• boiler handhole and manhole gaskets;
• steam-system gaskets;
• engine head, manifold and exhaust gaskets;
• spiral-wound gaskets with asbestos-containing filler;
• specialty chemical-process gaskets;
• gasket sheet stock cut or punched in maintenance shops; and
• other high-temperature sealing products containing asbestos.

These categories do not establish that every gasket of the same type contained asbestos. Product-specific evidence is needed whenever possible.

How Asbestos Exposure Could Occur

A potential exposure pathway requires an asbestos-containing gasket and work that disturbs it. An installed and undisturbed gasket may present a different exposure potential than a dry, bonded gasket being scraped from a flange or power-sanded from a seating surface.

Potential disturbance could occur during tasks such as:

• removing old gaskets from pumps, valves or piping;
• scraping gasket residue from flange faces;
• wire-brushing or grinding sealing surfaces;
• cutting replacement gaskets from asbestos-containing sheet stock;
• punching or drilling bolt holes in gasket material;
• breaking brittle gaskets during disassembly;
• overhauling engines, boilers, pumps, valves or turbines;
• cleaning gasket debris from work areas;
• dismantling equipment during shutdowns; and
• disposing of used gasket material.

Actual exposure depends on asbestos content, gasket condition, removal method, use of power tools, frequency, duration, proximity, ventilation and controls.

Workers and Workplaces That May Have Encountered Asbestos Gaskets

Workers who installed, fabricated, removed or replaced historical gaskets may have encountered asbestos-containing materials when those products were present and disturbed. A job title alone does not establish exposure.

Potentially relevant occupations may include pipefitters, steamfitters, boilermakers, millwrights, machinists, mechanics, pump and valve repair workers, stationary engineers, turbine mechanics and industrial maintenance employees.

Possible settings include power plants, refineries, chemical plants, factories, boiler rooms, shipyards, engine rooms, mechanical rooms, industrial maintenance shops and equipment-rebuild facilities.

Nearby workers may also be relevant when dry scraping, grinding, gasket cutting or overhaul work generated dust in shared work areas.

Gasket Removal, Fabrication and Cleanup Exposure Risks

Removing old gaskets

After years of heat and pressure, gaskets can adhere tightly to flange faces and equipment surfaces. If the gasket contained asbestos, dry scraping or aggressive removal could disturb fibers.

Cleaning sealing surfaces

Workers may use scrapers, wire brushes, abrasive pads or power tools to remove gasket residue. Historical exposure research has identified dry removal followed by dry power sanding as a task that can produce short-term airborne asbestos exposure when asbestos gaskets are involved.

Fabricating replacement gaskets

Maintenance shops sometimes cut replacement gaskets from sheet stock. If the sheet contained asbestos, cutting, punching and drilling could disturb the material directly.

Overhaul work

Repeated maintenance on pumps, valves, boilers, engines and turbines can involve numerous gaskets. The number of gasket changes and the work methods used can be important when reconstructing exposure.

Cleanup and disposal

Dry sweeping, brushing or handling gasket debris could disturb asbestos-containing residue. Historical cleanup practices should be considered separately from the gasket-removal task itself.

Evidence That May Identify Asbestos-Containing Gaskets

Exposure reconstruction is strongest when evidence identifies the exact gasket, manufacturer, brand, part number, equipment application, service period and work performed.

Useful evidence may include:

• gasket manufacturer and brand names;
• part numbers and packaging;
• gasket-sheet labels or inventory records;
• pump, valve, boiler or engine manuals;
• illustrated parts lists;
• maintenance specifications and work orders;
• purchase orders, invoices and supplier records;
• outage and overhaul logs;
• historic photographs of products or work areas;
• technical data sheets and safety data sheets where available;
• laboratory analysis of surviving gasket material;
• employer, union or military records documenting assignments; and
• coworker or supervisor statements identifying the gasket products and tasks.

Evidence should distinguish the gasket itself from nearby packing, insulation, rope, cement or other asbestos-containing materials whenever possible.

Medical and pathology records may document an asbestos-related diagnosis but do not establish which historical gasket was an exposure source.

Secondhand Exposure and Health Risks

If work with asbestos-containing gaskets generated fibers that accumulated on clothing, shoes, tools or belongings, asbestos could potentially have been carried away from the workplace. This is a possible secondhand exposure pathway, but family relationship alone does not establish exposure.

Asbestos exposure is associated with mesothelioma, asbestos-related lung cancer, asbestosis and other asbestos-related disease. Working with older gaskets does not diagnose disease and does not establish individual medical causation.

Anyone concerned about historical occupational asbestos exposure should discuss their work history and health with a qualified healthcare professional.

Legal and Compensation Considerations

Depending on the evidence and circumstances, legal options may be available to a person diagnosed with an asbestos-related disease after documented exposure to a specific asbestos-containing gasket product.

A legal review may consider the gasket manufacturer, distributor or supplier, equipment manufacturer where relevant, workplace, service period, tasks performed, frequency and duration of exposure, diagnosis, jurisdiction and filing deadlines.

Identifying a pump, valve, boiler, engine or machinery manufacturer does not automatically establish that it supplied every replacement gasket used during the equipment’s service life or that it is legally responsible. Liability is case-specific and depends on product evidence, exposure evidence and governing law.

Some matters may involve asbestos trust funds, but each trust has its own product, exposure and medical documentation requirements. Eligibility is not automatic, and compensation is not guaranteed.

Exposure that occurred decades ago does not by itself determine whether a claim is timely. Statutes of limitation and other deadlines vary by jurisdiction and circumstances and should be reviewed individually.

Gasket Products Asbestos Exposure FAQs

Did some old gaskets contain asbestos?

Yes. Certain historical sheet, flange, engine, boiler and equipment gaskets incorporated asbestos-containing materials, while many other gaskets did not.

Why was asbestos used in gasket products?

Asbestos offered heat resistance, strength and chemical resistance that could be useful in high-temperature and high-pressure sealing applications.

Can scraping an old gasket release asbestos fibers?

Potentially, if the gasket contains asbestos and dry scraping or other mechanical disturbance damages the material.

Can power sanding gasket residue create exposure?

Potentially. Historical exposure research has identified dry gasket removal followed by dry power sanding as a task capable of producing short-term asbestos exposure when asbestos-containing gaskets are involved.

Can cutting gasket sheet create asbestos exposure?

Potentially, when asbestos-containing sheet stock is cut, punched or drilled to make replacement gaskets.

Did every pump or valve gasket contain asbestos?

No. Gasket materials varied widely, and many used rubber, cork, metal, graphite or other non-asbestos materials.

What evidence can identify an asbestos gasket?

Useful evidence can include manufacturer names, part numbers, packaging, equipment manuals, invoices, maintenance records, laboratory reports and witness testimony.

Does working with old gaskets automatically qualify someone for compensation?

No. Legal eligibility depends on product identification, asbestos-content evidence, exposure history, diagnosis, jurisdiction and other case-specific facts. Compensation is not guaranteed.

For related information, see Industrial Components & Sealing Products Asbestos Exposure, Pumps, Valves & Gaskets Asbestos Exposure, Steam Products Asbestos Exposure, Boiler Products Asbestos Exposure, Engine Products Asbestos Exposure, Turbine Products Asbestos Exposure, Rope Products Asbestos Exposure, Tape Products Asbestos Exposure, and the main Asbestos Exposure in Products guide.

Get Help Reviewing Gasket Product Exposure

If you or a family member has been diagnosed with mesothelioma, asbestos-related lung cancer or another asbestos-related disease and you are trying to identify older sheet gaskets, flange gaskets, pump or valve gaskets, boiler gaskets, engine gaskets or gasket stock from a power plant, refinery, factory, shipyard, boiler room or industrial maintenance setting, we can help organize the product and exposure history that may be relevant.

Call 800.291.0963 to discuss what you remember about the gasket product, manufacturer, equipment, workplace and work performed. Live chat is available 24/7, 365 days a year. Submit Your Case using the form below.

Prior exposure does not automatically establish a legal claim. Eligibility depends on the evidence, diagnosis, jurisdiction and other circumstances, and compensation is not guaranteed.

⚕️ Legal & Medical Information Disclaimer
This page provides general educational information and is not medical or legal advice. The information does not establish asbestos exposure, diagnosis, causation, liability, claim eligibility or compensation. Medical concerns should be discussed with a qualified healthcare professional, and legal questions should be reviewed with a qualified attorney.