Mesothelioma Lawyer Guide: Mare Island Naval Shipyard Asbestos Exposure and Your Legal Rights

If you worked at Mare Island Naval Shipyard and have been diagnosed with mesothelioma, asbestosis, or lung cancer, you have a narrow window to act. Federal maritime law gives you three years from diagnosis to file a civil lawsuit against asbestos manufacturers — and that clock is already running. Trust fund claims and workers’ compensation pathways may extend your recovery options. This guide covers the products allegedly used at Mare Island, the manufacturers who supplied them, and what your legal options look like today.

Urgent Filing Deadline Warning for Shipyard Workers

Federal maritime law: Three years from diagnosis to file a civil lawsuit (46 U.S.C. § 30106). Miss that window and you lose the right to sue manufacturers entirely.

State law considerations: Depending on where you file and your residency, state statutes of limitations may apply — some longer than three years. An experienced asbestos attorney can identify which venue and which deadline gives you the strongest position.

Trust fund claims: No statute of limitations. These can be filed at any time, even decades after exposure. But filing early maximizes recovery before trust assets are depleted.

The bottom line: Every month you wait is a month the other side uses to find witnesses, destroy records, and run out the clock. Call a shipyard asbestos attorney today.

Mare Island Naval Shipyard: Scale, Operations, and Asbestos Risk

Mare Island Naval Shipyard in Vallejo, California operated from 1854 to 1996 — the oldest naval shipyard on the Pacific Coast and one of the most heavily industrialized military sites in American history. Thousands of civilian tradesmen, union workers, and laborers who worked there between the 1940s and 1990s were allegedly exposed to asbestos fibers from products supplied by Johns-Manville, Owens-Illinois, W.R. Grace, Crane Co., and other major manufacturers.

Operational Scope and Peak Employment

At its World War II peak, Mare Island reportedly employed more than 40,000 workers building, overhauling, and repairing submarines, destroyers, cruisers, and auxiliary vessels. The shipyard:

• Constructed over 500 vessels during its operational life
• Served as the primary submarine construction and repair facility on the Pacific Coast through the Cold War
• Handled both conventionally powered and nuclear-powered submarines
• Operated continuously until decommissioning in April 1996

Navy specifications required asbestos-containing materials in virtually every vessel system. That mandate, applied across 140 years of continuous operation, created massive occupational exposure risk for every trade working on the waterfront.

Asbestos Products Allegedly Used at Mare Island: Manufacturers and ACMs

Pipe Covering, Lagging, and Thermal Insulation

Johns-Manville pipe insulation and lagging — Pipe covering and insulating cement applied to steam lines, high-pressure pipes, and hot water systems throughout vessel interiors. Allegedly handled by pipe laggers, insulators, and pipefitters during drydock overhauls.

Owens-Illinois Kaylo block insulation — Preformed and poured insulation on boilers, turbines, and pressure vessels. Kaylo products were cut, fitted, and abraded during installation and removal, generating high fiber concentrations in confined shipboard spaces.

Armstrong World Industries pipe wrap and insulation — Spray-applied and troweled insulation products on steam lines and machinery, reportedly used alongside Johns-Manville and Owens-Illinois products throughout vessel construction and overhaul.

Thermobestos block insulation — High-temperature insulation on boilers and steam systems. Degraded Thermobestos removed during drydock operations allegedly released exceptionally high fiber concentrations in enclosed compartments.

Aircell insulation — Lightweight, friable insulation on steam lines and pressure vessels. Among the most hazardous materials encountered during removal operations.

Refractory Brick, Boiler Insulation, and High-Temperature Products

Babcock & Wilcox refractory and boiler insulation — Bricks, cement, and insulating materials inside boiler fireboxes and furnaces. Boilermakers allegedly handled these products directly during vessel construction and overhaul in poorly ventilated engine rooms.

Combustion Engineering refractory products — High-temperature insulation and brick for boiler applications, reportedly supplied throughout Mare Island’s peak operational years.

Cranite refractory brick — Asbestos-containing brick used throughout Mare Island’s industrial steam systems and aboard vessels under construction and repair.

Gaskets, Packing, Valve Materials, and Sealants

Crane Co. valve packing and gaskets — Asbestos-containing packing material and compression gaskets on flanges, valves, and pump assemblies. Machinists and maintenance workers allegedly replaced these during routine service, releasing fibers each time a joint was broken.

Garlock Sealing Technologies gaskets — Valve gaskets and pipe fitting sealants throughout shipboard mechanical systems.

Johns-Manville compression packing and rope packing — High-temperature packing on boiler doors, valve stems, and pump shafts. Removed and replaced repeatedly throughout each vessel’s service life.

Superex asbestos rope packing — Applied to high-temperature valve and boiler applications across multiple vessel classes.

W.R. Grace packing and gasket materials — Multi-purpose sealing products on shipboard and shore-based systems throughout the facility.

Spray-Applied Fireproofing and Structural Insulation

W.R. Grace Monokote spray fireproofing — Spray-applied insulation and fireproofing on structural steel and bulkheads during vessel construction and overhaul. Highly friable once applied; removal operations allegedly generated significant fiber release.

Zonolite insulation — W.R. Grace spray-applied product used on structural elements throughout the shipyard’s buildings and vessels.

Georgia-Pacific insulation products — Spray-applied insulation during vessel construction and maintenance operations.

Asbestos Cement Board, Tile, and Building Products

Johns-Manville Transite and Celotex asbestos cement board — Fire barriers, electrical panel backing, and structural panels installed throughout shipyard facilities and vessels. Machinists, electricians, and laborers allegedly cut and shaped these materials without respiratory protection.

Gold Bond and Sheetrock asbestos-containing products — Deck tile and insulation board in crew berthing and working spaces throughout vessels under construction and overhaul.

Pabco tile — Asbestos-containing deck tile installed during vessel construction and overhaul. Painters and laborers allegedly disturbed and removed these materials during vessel modernization without respiratory protection.

Manufacturers Alleged to Have Supplied Mare Island Products

Who Was Exposed: Occupations at Highest Risk

Pipe Laggers and Heat & Frost Insulators — Highest Exposure Risk

Members of Heat and Frost Insulators Local 1 and Local 27 directly handled Johns-Manville pipe covering, mixed Armstrong Cork insulating cement, cut preformed Thermobestos and Owens-Illinois Kaylo sections, and applied Aircell lagging to miles of piping inside confined ship compartments. These spaces were typically unventilated, with fiber concentrations allegedly exceeding federal limits by multiples.

Laggers working drydock and overhaul operations faced the highest documented risk. Removing aged, friable Thermobestos, Aircell, and Superex products installed decades earlier released asbestos fibers at concentrations far exceeding those generated during new construction. Scientific studies cited in asbestos litigation consistently identify overhaul insulators as the occupational group with the highest mesothelioma rates among shipyard populations.

Boilermakers — High-Risk Drydock Operations

Boilermakers removed and replaced Babcock & Wilcox and Combustion Engineering boiler insulation and Cranite refractory brick inside enclosed engine rooms. These removal tasks allegedly generated extreme fiber concentrations in spaces with minimal ventilation. Boilermakers reportedly worked in direct contact with friable materials and abraded surfaces for entire shifts.

Pipefitters and Plumbers — Sustained Exposure

Plumbers and Pipefitters UA Local 562 members routinely cut into insulated pipe systems and worked alongside laggers installing and removing Johns-Manville, Crane Co., and Armstrong Cork pipe products. These workers spent entire shifts in spaces where pipe insulation dust had settled on every horizontal surface.

Electricians — Structural Panel and Cable Tray Work

Electricians pulled wire through cable trays backed by Johns-Manville and Celotex asbestos cement board, installed equipment panels with transite backing, and disturbed settled asbestos dust during vessel wiring, modernization, and overhaul. Allegedly exposed not only during active cutting and fitting but during routine maintenance that kicked up decades of accumulated fiber dust.

Painters and Coating Specialists — Surface Disturbance

Painters applied and removed coatings over Gold Bond, Sheetrock, and Pabco asbestos-containing surfaces throughout vessel interiors and shipyard buildings. Surface preparation work disturbed friable materials and released fibers into the breathing zone. Painters reportedly performed this work without respiratory protection throughout the 1950s, 1960s, and 1970s.

Welders and Torch Operators — Incidental but Significant Exposure

Welders and burners worked in spaces where W.R. Grace Monokote, Georgia-Pacific insulation, and other friable products had settled on decks and horizontal surfaces. Heat and vibration from torch work disturbed those materials and drove fibers into the breathing zone. Welders may have been exposed not from materials they handled directly, but from materials disturbed by work they had no control over.

Machinists and Machinery Technicians — Maintenance Exposure

Machinists replaced Crane Co. asbestos gaskets and Garlock seals on valves and flanges as routine maintenance — the kind of repetitive task performed hundreds of times over a career. Each broken joint, each scraped flange surface, each cut gasket released fibers. Over twenty or thirty years, that exposure accumulates.

Laborers and Helpers — Unprotected Debris Handling

General laborers swept, cleaned, and hauled debris containing Johns-Manville, Owens-Illinois Kaylo, Thermobestos, and other ACMs without respiratory protection. They disposed of degraded pipe insulation, broken refractory brick, and friable materials generated during drydock operations — often in the most confined spaces on the vessel, after the skilled trades had moved on and left the contamination behind.

Carpenters and Structural Workers — Incidental Exposure

Carpenters worked near and around asbestos-containing structural materials, transite board, and thermal insulation during vessel construction, modification, and overhaul. Some carpentry work required cutting or drilling through insulation products, and all of it was performed in shared spaces where fibers from adjacent trades settled continuously.

Peak Exposure Years and Risk Contexts

When Fiber Release Was Most Intense

Drydock and overhaul operations carried the highest risk. Vessels brought into Mare Island’s drydocks required workers to strip out old, degraded insulation before new systems could be installed. Aged Thermobestos, Aircell, and Superex products installed decades earlier crumble far more readily

For informational purposes only. Not legal advice. No attorney-client relationship is created by reading this page. © 2026 Rights Watch Media Group LLC — Disclaimer · Privacy · Terms · Copyright

Recent News & Developments

Asbestos Exposure at Mare Island Facilities

In June 2021, the East Bay Times reported that workers in a Mare Island building owned by the Navy were allegedly exposed to asbestos, raising ongoing concerns about the adequacy of hazard controls in structures remaining from the shipyard’s active Navy era. The report underscores that asbestos-containing materials in aging buildings at the former shipyard continue to pose risks to current occupants, contractors, and remediation workers — not only to veterans who served there during peak operations from the 1850s through the yard’s closure in 1996.

A 2016 SFGATE report documented a case in which an asbestos-sickened Mare Island shipyard worker lost a legal fight against a Navy supplier, illustrating the litigation challenges veterans and former civilian workers face when pursuing claims against equipment manufacturers and government contractors. Such cases frequently turn on product identification, chain-of-custody evidence, and the applicable statute of limitations under federal maritime law (the Jones Act and general maritime negligence theories).

EPA and Environmental Oversight

Mare Island Naval Shipyard remains a designated EPA Superfund site, with ongoing cleanup activities governed by federal CERCLA authority. In June 2024, the EPA fined two Vallejo-area companies over industrial runoff — a reminder that environmental enforcement in the broader Mare Island redevelopment zone remains active. Veterans and their advocates should monitor EPA’s publicly posted remedial action updates for the Mare Island site, as asbestos abatement milestones and NESHAP (National Emission Standards for Hazardous Air Pollutants) notifications are required to be filed with the Bay Area Air Quality Management District whenever regulated demolition or renovation activities disturb asbestos-containing materials.

VA Benefits and Regulatory Landscape

Veterans who worked at Mare Island should be aware that the VA’s presumptive service-connection framework under 38 CFR § 3.309 does not currently include a blanket asbestos presumption, meaning mesothelioma and related disease claims typically require documented in-service exposure evidence. The Blue Water Navy Vietnam Veterans Act of 2019 expanded presumptive eligibility for certain veterans, and ongoing advocacy efforts continue to press Congress for a dedicated asbestos presumption for shipyard workers. Veterans should work with accredited VA claims agents or attorneys to compile exposure buddy statements, Naval service records, and occupational history documentation.

Civilian and military workers at this shipyard who were diagnosed with mesothelioma, lung cancer, or asbestosis may have legal rights under federal maritime law and applicable state statutes. Multiple asbestos trust funds hold assets specifically for shipyard workers and their families.