Narcocast ES Fine Trowel (1963–1977)

Narcocast ES Fine Trowel was an asbestos-containing refractory castable product manufactured by Narco (North American Refractories Company). Produced between 1963 and 1977, this product was marketed and used across a range of heavy industrial settings where high-temperature lining applications demanded durable, heat-resistant materials. Workers who handled, mixed, applied, or worked in proximity to Narcocast ES Fine Trowel during its production years may have been exposed to airborne asbestos fibers and may be eligible to file a claim with the North American Refractories Company Asbestos PI Trust.

Product Description

Narcocast ES Fine Trowel was a specialty refractory castable formulated for applications requiring a fine-textured, trowelable surface finish in high-heat industrial environments. As a castable refractory, it was designed to be mixed with water on-site and applied by trowel to form linings, coatings, and monolithic refractory structures in furnaces, kilns, boilers, and related industrial equipment.

North American Refractories Company, known commercially as Narco, was a prominent manufacturer of refractory products serving the steel, aluminum, glass, cement, and petrochemical industries throughout the mid-twentieth century. The company’s product line included a wide array of castables, plastics, ramming mixes, and mortars, with Narcocast ES Fine Trowel representing one entry in a broader catalog of asbestos-containing refractory materials sold under the “Narcocast” brand family.

The product’s “ES” designation referred to its engineered specification profile — a fine-grained castable suited for applications where surface smoothness and dimensional precision were required. It was marketed to industrial facilities requiring tight tolerances in refractory linings, including combustion chambers and flue systems where thermal cycling and chemical attack demanded reliable materials.

Production of Narcocast ES Fine Trowel continued through 1977, a period during which regulatory attention to asbestos in industrial products was increasing significantly. The product was sold and distributed throughout the United States during its manufacturing run.

Asbestos Content

Narcocast ES Fine Trowel contained asbestos as a functional ingredient incorporated into its refractory formula. In mid-twentieth-century refractory manufacturing, asbestos — most commonly chrysotile, and in some formulations amphibole varieties such as amosite — was added to castable products to enhance thermal insulation properties, improve tensile strength, reduce cracking during heat cycling, and extend the service life of high-temperature linings.

Refractory castables like Narcocast ES Fine Trowel relied on asbestos fibers to bind the matrix and impart heat resistance at the extreme temperatures generated in industrial furnaces and kilns. This was an industry-standard practice among refractory manufacturers during the 1960s and 1970s, and Narco’s Narcocast product line reflected that widespread use.

The North American Refractories Company Asbestos PI Trust, established through bankruptcy proceedings, recognizes Narcocast ES Fine Trowel as an asbestos-containing product associated with the company’s historical liability. Product identification and trust claim eligibility are tied to documented exposure to Narco-manufactured refractory materials, including this specific product.

How Workers Were Exposed

Industrial workers who handled or worked near Narcocast ES Fine Trowel during its installation, use, maintenance, repair, or removal were at risk of inhaling airborne asbestos fibers. The nature of refractory castable work created numerous exposure pathways:

Mixing and preparation. Narcocast ES Fine Trowel was supplied as a dry powder blend that workers mixed with water before application. Opening bags of dry castable and mixing the material released asbestos-containing dust into the breathing zone of workers performing this task. Workers without adequate respiratory protection could inhale significant concentrations of asbestos fibers during this phase.

Application and troweling. Applying the castable by trowel to furnace walls, kiln interiors, boiler fireboxes, and other refractory surfaces involved direct hand contact with the wet material and generated dust and residual fiber release, particularly where the material was worked and smoothed.

Cutting and shaping. Where set or partially cured castable required grinding, cutting, or mechanical adjustment to achieve proper fit, power tools generated substantial amounts of fine dust containing respirable asbestos fibers.

Repair and removal. Refractory linings require periodic replacement. Workers engaged in breaking out, chipping, or demolishing aged Narcocast ES Fine Trowel linings — activities common in industrial facilities operating high-temperature equipment — disturbed the set material and released previously bound asbestos fibers in concentrated form.

Bystander exposure. Industrial workers generally in the vicinity of refractory installation or removal operations — including millwrights, pipefitters, boilermakers, ironworkers, electricians, and general laborers — were exposed to asbestos dust generated by other tradespeople working with Narcocast ES Fine Trowel in shared workspaces such as foundries, steel mills, glass plants, and chemical processing facilities.

OSHA’s current permissible exposure limit (PEL) for asbestos is 0.1 fibers per cubic centimeter of air as an eight-hour time-weighted average. During the years Narcocast ES Fine Trowel was in production and widespread use, no such protective standard existed, and respiratory protection in industrial environments was inconsistent or absent. Workers in the 1960s and 1970s routinely performed refractory work without the benefit of modern exposure controls, engineering ventilation, or appropriate respirators.

Asbestos-related diseases — including mesothelioma, asbestosis, lung cancer, and pleural disease — may not manifest until decades after the initial period of exposure, meaning workers exposed to Narcocast ES Fine Trowel during its production years (1963–1977) may only now be receiving diagnoses.

North American Refractories Company Asbestos PI Trust

North American Refractories Company filed for bankruptcy protection in part due to the volume of asbestos-related personal injury claims arising from its product line, including Narcocast ES Fine Trowel. As a result of those proceedings, the North American Refractories Company Asbestos PI Trust was established to compensate individuals who suffered asbestos-related harm from exposure to Narco products.

Individuals who were exposed to Narcocast ES Fine Trowel and have been diagnosed with a qualifying asbestos-related disease may be eligible to file a claim with this trust. The trust recognizes claims in categories that typically include:

  • Mesothelioma — the most serious asbestos-related malignancy, arising from exposure to asbestos fibers
  • Lung cancer — where qualifying asbestos exposure is documented
  • Asbestosis — a chronic fibrotic lung disease caused by prolonged asbestos inhalation
  • Other asbestos-related conditions — including pleural disease and related nonmalignant conditions

Claimants are generally required to demonstrate a qualifying diagnosis, documented exposure to a Narco product (such as Narcocast ES Fine Trowel), and that exposure occurred within the trust’s covered period. Employment records, coworker affidavits, union records, and product identification documentation can all support a claim submission.

Filing a trust claim does not necessarily preclude separate civil litigation against other potentially liable parties, including other manufacturers of asbestos-containing products to which a claimant may have been exposed. An attorney experienced in asbestos litigation can evaluate all available avenues of compensation, including trust fund claims, litigation, and Veterans Administration benefits where applicable.

Workers and family members who believe they were exposed to Narcocast ES Fine Trowel between 1963 and 1977 should consult with a qualified asbestos attorney to assess their eligibility and preserve their legal rights within applicable statutes of limitations.