Industrial Components & Sealing Products Asbestos Exposure

Industrial Sealing Products and Historical Asbestos Use

Industrial systems rely on gaskets, packing and other sealing products to help control leaks around flanges, valves, pumps, boilers, engines, turbines, compressors and piping. Historically, some manufacturers used asbestos-containing materials where seals needed to tolerate high heat, steam, pressure or repeated mechanical stress.

Potentially relevant asbestos-containing materials could be found in flat gaskets, spiral-wound gasket fillers, packing rings, braided packing, rope seals, gasket sheet stock and specialty sealing products. The asbestos-containing source was generally the replaceable sealing material rather than the surrounding metal equipment.

The presence of older industrial machinery does not prove asbestos exposure. The specific equipment, seal type, manufacturer, brand, part number, replacement history and work activity should be evaluated whenever possible.

Sealing Materials That May Have Involved Asbestos

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

• compressed asbestos sheet gaskets;
• flange gaskets;
• valve bonnet and cover gaskets;
• pump casing and cover gaskets;
• engine and exhaust gaskets;
• boiler and steam-system gaskets;
• braided valve and pump packing;
• rope packing and sealing cord;
• gland packing rings;
• spiral-wound gasket filler materials;
• sheet gasket stock cut to fit in maintenance shops; and
• other specialty heat- and pressure-resistant sealing materials.

Each product should be evaluated separately because manufacturers changed materials and formulations over time.

How Asbestos Exposure Could Occur

A potential exposure pathway requires an asbestos-containing sealing product and work that disturbs it. An installed gasket or packing material may present a different exposure potential than a dried gasket being scraped from a flange or old packing being pulled from a valve stem.

Potential disturbance could occur during tasks such as:

• removing old flange or equipment gaskets;
• scraping gasket residue from metal surfaces;
• cutting replacement gaskets from sheet stock;
• drilling or punching bolt holes in gasket material;
• pulling packing from pump or valve stuffing boxes;
• cutting braided packing or rope seals to length;
• cleaning gasket and packing debris from work areas;
• overhauling pumps, valves, boilers, engines or steam equipment;
• breaking apart old equipment for rebuilding; and
• dismantling industrial systems during shutdowns or demolition.

Actual exposure depends on asbestos content, material condition, work method, frequency, duration, proximity, ventilation and controls.

Workers and Industrial Settings That May Have Encountered These Products

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

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

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

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

Maintenance and Repair Exposure Risks

Gasket removal

Older gaskets can adhere tightly to flanges, covers and machinery surfaces. If the gasket contained asbestos, scraping, wire brushing or grinding residue could disturb fibers.

Cutting gasket sheet

Maintenance shops sometimes fabricated replacement gaskets from sheet material. If asbestos-containing sheet stock was used, cutting, punching or drilling could create dust.

Packing replacement

Pump and valve packing may be compressed tightly around shafts or stems. If historical packing contained asbestos, pulling, cutting and cleaning the stuffing box could disturb fibers.

Equipment overhaul

Major overhaul work on pumps, valves, engines, boilers and steam systems can involve repeated removal and replacement of sealing products. Frequency and duration of this work can be important when reconstructing exposure.

Shutdown and demolition work

Industrial shutdowns, retrofits and demolition can disturb many gaskets and seals in a short period. Each possible asbestos-containing product should be identified separately.

Evidence That May Identify Asbestos-Containing Sealing Products

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

Useful evidence may include:

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

Testing and documentation should distinguish gaskets, packing, rope seals, insulation and other nearby materials whenever those products can be separately identified.

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

Secondhand Exposure and Health Risks

If work with asbestos-containing sealing products 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 around older industrial equipment 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, packing or sealing product.

A legal review may consider the sealing-product manufacturer, equipment manufacturer where relevant, distributor or supplier, workplace, maintenance 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 or packing product 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.

Industrial Sealing Products Asbestos Exposure FAQs

Did old industrial gaskets contain asbestos?

Some historical gaskets contained asbestos, especially products designed for high heat, steam or pressure, while many other gaskets did not.

Could pump and valve packing contain asbestos?

Some historical braided packing and packing rings used asbestos-containing materials, depending on manufacturer, application and year.

Could rope seals contain asbestos?

Some historical heat-resistant rope and sealing cord products used asbestos fibers. Product identification is needed to determine whether a specific rope seal contained asbestos.

Can scraping old gaskets release asbestos fibers?

Potentially, if the gasket contains asbestos and scraping, grinding or wire brushing disturbs the material.

Can cutting gasket sheet create asbestos exposure?

Potentially, when asbestos-containing gasket sheet is cut, punched or drilled during fabrication.

Can industrial maintenance workers have asbestos exposure from seals?

Potentially, when their work involved asbestos-containing gaskets, packing or other sealing products. Job title alone does not prove exposure.

What evidence can identify an asbestos-containing sealing product?

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

Does working with old gaskets or packing 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 Pumps, Valves & Gaskets Asbestos Exposure, Steam Products Asbestos Exposure, Boiler Products Asbestos Exposure, Engine Products Asbestos Exposure, Rope Products Asbestos Exposure, Tape Products Asbestos Exposure, Textile Products Asbestos Exposure, Machinery Products Asbestos Exposure, and the main Asbestos Exposure in Products guide.

Get Help Reviewing Industrial Sealing 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 gaskets, packing, rope seals, sheet gasket materials or other industrial sealing products from a refinery, power plant, factory, mechanical room, shipyard or maintenance shop, we can help organize the product and exposure history that may be relevant.

Call 800.291.0963 to discuss what you remember about the equipment, sealing product, manufacturer, 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.