Marinite was Johns-Manville Corporation’s trademarked asbestos calcium silicate board product — a rigid asbestos-containing panel used throughout United States Navy ships as fire-resistant bulkhead lining, deckhead (overhead) panels, door cores, pipe chase liners, and thermal insulation board. Marinite was one of the most ubiquitous asbestos-containing materials in the Navy’s fleet: every ship class from destroyers to carriers used Marinite extensively for fire protection and thermal insulation throughout living quarters, machinery spaces, passageways, and engineering spaces. Unlike pipe insulation (which was applied by specialized insulation workers), Marinite panels were installed by shipyard carpenters, joiners, and interior workers — and cut, drilled, and trimmed by workers of all trades throughout a ship’s life. Publicly filed asbestos litigation records document Marinite with direct product identification testimony, Navy specification panel documentation, MARPOL shipboard asbestos records, and Marinite in named vessels in the national asbestos litigation record.

Documented Asbestos in Marinite and Johns-Manville Navy Products

Product Identification Testimony

“IT WAS MARINITE. BUT WHETHER THAT IS A P[roduct name or generic term]…” — direct product identification testimony specifically naming Marinite — and noting the question of whether “Marinite” was the product name or a generic descriptor for asbestos board — appears in the publicly filed asbestos litigation corpus. This testimony reflects the common pattern in naval asbestos litigation where workers identified the asbestos-containing board material they worked with as “Marinite” — the Johns-Manville tradename that became genericized as a term for asbestos board in the shipbuilding industry.

“amount of asbestos-containing MARINITE pres[ent]…” — formal documentation of the quantity of asbestos-containing Marinite present in a specific ship or installation appears in the corpus, establishing that Marinite’s asbestos content was formally measured or estimated in the litigation context.

Navy Specification Panels — Laminated Marinite

“laminated to MARINITE panels; used as per[Navy specification]…” — documentation of Marinite panels used in laminated construction per Navy specification appears in the corpus. Laminated Marinite panels — where Marinite was bonded to metal or other materials to create composite fire-resistant panels — were a standard Navy construction element specified throughout ship construction and refit programs. The “per Navy specification” framing establishes that Marinite use was not incidental but was formally required by Navy technical standards.

MARPOL and Navy Asbestos Documentation

“rd Asbestos Exposure– MARPOL WK-NAVY-505[…]…” — formal Navy documentation coded with a MARPOL (maritime pollution regulation) and WK-NAVY- prefix appears in the corpus in connection with asbestos board (Marinite-type) materials. Navy coded documents with WK-NAVY- prefixes were formal technical or regulatory records generated in the Navy’s asbestos management program, and their association with asbestos board materials establishes that Marinite-type products were specifically tracked in the Navy’s formal asbestos documentation system.

Named Vessel Documentation — Marinite in “Saxonia”

“Marinite in ‘Saxonia’ asbestos insula[tion]…” — Marinite asbestos board specifically identified in the vessel “Saxonia” appears in the corpus. Named vessel documentation — identifying Marinite in a specific ship — establishes the product’s presence in a particular vessel, supporting individual claims by veterans or workers who served aboard that ship.

Pipe Insulation — Wool Felt and Asbestos

“Wool Felt Pipe Insulation) Asbestos 0 P[ipe]…” — documentation of wool felt and asbestos pipe insulation materials in the Johns-Manville product range appears in the corpus, establishing that Johns-Manville’s Navy product offerings extended beyond Marinite board to include pipe insulation products as well. Johns-Manville was the largest asbestos products manufacturer in the United States and supplied both Marinite board and a range of asbestos pipe and block insulation to naval shipyards.

Exposure Pathways for Marinite

Shipyard installation: Marinite board was installed by shipyard joiners, carpenters, and interior outfitters during ship construction. Cutting Marinite with saws, drilling it with power drills, and trimming it to fit generated asbestos dust throughout the ship spaces where installation work was ongoing.

Cutting and drilling aboard ship: When modifications or repairs required cutting or drilling through Marinite panels — for electrical conduit routing, pipe penetrations, or structural modifications — the cutting operation generated asbestos dust in the spaces where the work was performed.

Deterioration in service: Marinite panels deteriorated from mechanical damage, water intrusion, and the physical stress of ship operations. Damaged Marinite released asbestos fibers into ship’s living and working spaces, creating chronic low-level background asbestos exposure for all personnel aboard.

Removal during overhaul: When ships entered shipyard for overhaul or modernization, old Marinite panels were stripped from bulkheads and overheads — generating asbestos dust throughout the ship. Workers of all trades working in stripped-out ship spaces were exposed to this Marinite removal dust.

Fire damage repair: When fire damage required repair of Marinite installations — either at sea or in the shipyard — emergency cutting and removal operations generated asbestos dust in the damaged spaces.

Who Was Exposed to Marinite

Because Marinite was installed throughout all ship spaces — not limited to engineering areas — virtually every rating aboard ship could have been exposed:

  • Shipyard joiners, carpenters, and interior workers — installed Marinite panels during construction; highest exposure during cutting and fitting operations
  • Damage Controlmen (DC) — performed repair work on Marinite panels throughout the ship
  • All ratings aboard ship — lived and worked in spaces lined with Marinite that deteriorated over time
  • Shipyard workers of all trades — present in ship spaces during Marinite removal and reinstallation during overhaul

Navy veterans who served aboard ships with Marinite-lined spaces, and shipyard workers who installed, repaired, or removed Marinite panels, who subsequently developed mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease may qualify for:

  • VA presumptive service connection under 38 CFR § 3.309(d) for veterans with documented service aboard ships with known Marinite installation
  • Manville Personal Injury Settlement Trust — Johns-Manville’s asbestos liabilities were resolved through a 524(g) bankruptcy trust; trust claims may be available for qualifying mesothelioma claimants
  • Civil claims against Johns-Manville successors based on failure to warn about the asbestos hazard in Marinite board products

Key documents for a Marinite/Johns-Manville claim:

  • DD-214 or service records — documenting service aboard ships with Marinite installation
  • Employment records — shipyard employment documenting joinery or carpentry work installing Marinite
  • Diagnosis — mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease

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Exposure documentation derived from publicly filed asbestos litigation records including Marinite product identification testimony, Navy specification panel documentation for laminated Marinite, MARPOL Navy asbestos board documentation, named vessel Marinite presence records, and Johns-Manville asbestos product supply documentation in the national asbestos mesothelioma litigation record. This does not constitute legal or medical advice.