Narcocast ES Fine Trowel / Narcocrete Trowel / Narcolite Insulating Castable / Narmag OH Gun Mix

Narcocast ES Fine Trowel, Narcocrete Trowel, Narcolite Insulating Castable, and Narmag OH Gun Mix

Narco Industries produced a line of refractory products—Narcocast ES Fine Trowel, Narcocrete Trowel, Narcolite Insulating Castable, and Narmag OH Gun Mix—that were used across heavy industrial settings throughout the 1960s and into the 1970s. Litigation records document that these products contained chrysotile asbestos and were associated with occupational asbestos exposure among industrial workers who handled, applied, or worked near them during their years of manufacture and use.

Product Description

Narco Industries manufactured a range of refractory materials designed to withstand extreme heat in furnaces, kilns, boilers, and other high-temperature industrial equipment. The four products covered in this article each served a specific function within that category:

• Narcocast ES Fine Trowel was a castable refractory compound formulated for hand application using troweling techniques, designed to line and repair high-heat surfaces requiring a smooth, tight finish.
• Narcocrete Trowel similarly served as a trowel-applied refractory material intended for forming and patching heat-resistant linings in industrial furnaces and ovens.
• Narcolite Insulating Castable was a lightweight insulating castable refractory, typically mixed with water and poured or troweled into place to provide thermal insulation in high-temperature process equipment.
• Narmag OH Gun Mix was a gunning mix—a dry or semi-dry refractory compound applied by pneumatic gunning equipment—used to reline and repair open-hearth furnaces and similar metallurgical vessels.

These products were marketed primarily to steel mills, foundries, chemical processing facilities, and other heavy industrial operations where heat-resistant linings were critical to continuous production. The products were manufactured and distributed during the period from approximately 1960 through 1977.

Asbestos Content

Litigation records document that Narcocast ES Fine Trowel, Narcocrete Trowel, Narcolite Insulating Castable, and Narmag OH Gun Mix each contained chrysotile asbestos as a component of their refractory formulations. Chrysotile, sometimes referred to as white asbestos, was the most widely used form of asbestos in commercial and industrial products during the mid-twentieth century and was incorporated into refractory materials because of its heat-resistant, binding, and fiber-reinforcing properties.

In refractory castables and troweling compounds, chrysotile asbestos helped bind the mixture together and improved the material’s ability to resist thermal shock and mechanical stress. In gunning mixes such as Narmag OH Gun Mix, asbestos fibers were similarly incorporated to enhance the performance and adhesion of the sprayed material. Plaintiffs alleged that Narco was aware of the hazardous nature of asbestos-containing refractory materials during the period these products were manufactured, yet continued to produce and sell them without adequate warnings to workers who would encounter them in industrial environments.

The presence of chrysotile asbestos in these products is material to exposure claims because any activity that disturbed the product—mixing, troweling, gunning, cutting, or demolishing cured refractory linings—had the potential to release asbestos fibers into the surrounding air.

How Workers Were Exposed

Industrial workers in steel mills, foundries, chemical plants, and related heavy industries were the primary population exposed to Narco’s refractory products. Litigation records document a range of work tasks and job roles associated with exposure:

Mixing and preparation: Workers who mixed castable refractories such as Narcocast ES Fine Trowel, Narcocrete Trowel, and Narcolite Insulating Castable with water or other components could disturb dry powdered material, releasing asbestos fibers into the air before the product was wetted or consolidated.

Trowel application: Workers applying troweling compounds by hand or with hand tools worked in close proximity to the material throughout the application process. Spreading, smoothing, and finishing refractory surfaces with these products placed workers directly in contact with the asbestos-containing compound and any dust generated during application.

Pneumatic gunning: The application of Narmag OH Gun Mix via pneumatic gunning equipment was particularly associated with elevated dust generation. Gunning operations—in which dry mix was propelled through a hose and nozzle onto a furnace wall or vessel surface—produced clouds of fine refractory dust that could remain suspended in the enclosed or semi-enclosed spaces where this work was performed. Workers operating the gun, handling the hose, or working nearby were all potentially in the path of airborne fibers.

Demolition and maintenance: When existing refractory linings reached the end of their service life, they required removal before new material could be applied. Workers breaking out old refractory with jackhammers, chisels, or other tools could disturb friable, asbestos-containing material and release significant quantities of dust. Maintenance crews performing regular inspection and repair of furnace linings faced similar exposures on a recurring basis.

Bystander exposure: In large industrial facilities, other trades and workers present in the vicinity of refractory installation or demolition activities could be exposed to airborne asbestos fibers without directly handling the products themselves.

Plaintiffs alleged that these exposure pathways were foreseeable to Narco as a manufacturer of refractory materials and that the company failed to adequately warn workers, employers, or the public about the risks associated with inhaling asbestos fibers released during normal use of its products.

Documented Trust Fund / Legal Options

Narco Industries does not have an established asbestos bankruptcy trust fund. Individuals seeking compensation for asbestos-related illness connected to Narcocast ES Fine Trowel, Narcocrete Trowel, Narcolite Insulating Castable, or Narmag OH Gun Mix must pursue claims through civil litigation rather than through a pre-established trust claim process.

Who may have a claim: Workers who spent time in steel mills, foundries, open-hearth operations, chemical plants, or other heavy industrial facilities during the 1960s and 1970s and who were later diagnosed with mesothelioma, asbestosis, lung cancer, or other asbestos-related diseases may have grounds for a legal claim if their work history involved exposure to Narco refractory products.

Legal framing: Plaintiffs have alleged in civil litigation that Narco Industries knew or should have known that its chrysotile-containing refractory products presented serious health risks and that the company failed to provide adequate warnings or safety information to protect workers from those risks.

Steps to take: Individuals with a confirmed asbestos-related diagnosis who believe they were exposed to Narco refractory products should consult with an attorney experienced in asbestos litigation. Documenting work history, job sites, specific product contact, and co-worker testimony can all be important to establishing exposure in the absence of a trust fund process.

Other responsible parties: Because asbestos exposure in industrial settings typically involved multiple products and manufacturers, claims arising from refractory exposure may also involve other product manufacturers, distributors, or premises owners. An experienced asbestos attorney can evaluate the full range of potentially liable parties based on an individual’s specific work history.

The statute of limitations for asbestos claims varies by state, so prompt consultation with legal counsel is recommended for anyone who believes they may have been exposed to Narco refractory products.