Quigley Insulag Fireproofing Cement

Product Description

Quigley Insulag Fireproofing Cement was a refractory product manufactured by the Quigley Company during the period spanning 1963 through 1977. Refractory cements of this type were engineered to withstand extreme heat conditions, making them a practical choice for industrial environments where conventional building materials would fail under thermal stress. Insulag was formulated as a castable or trowel-applied fireproofing cement intended for use in furnaces, boilers, kilns, and other high-temperature industrial equipment and structures.

The Quigley Company was a well-established manufacturer of refractory and industrial products, producing a range of materials designed for service in metallurgical, chemical, and manufacturing plants where heat containment and fire resistance were operational priorities. Insulag Fireproofing Cement represented one line within this broader product portfolio, sold into industrial markets throughout the period of its production. The product was typically supplied as a dry mix that workers combined with water on-site before application, a preparation process that carried significant implications for airborne fiber release.

Quigley Insulag was applied to structural elements, equipment surfaces, pipe systems, and industrial enclosures where thermal protection was required. Its use was widespread across heavy industry sectors, including steel production, chemical processing, and power generation facilities throughout the United States during the 1960s and 1970s.

Asbestos Content

Quigley Insulag Fireproofing Cement contained chrysotile asbestos as a component of its formulation. Chrysotile, also referred to as white asbestos, is a serpentine fiber that was widely incorporated into refractory and fireproofing products during this era due to its heat resistance, tensile strength, and binding properties. These characteristics made chrysotile an attractive additive for manufacturers producing materials intended to perform under prolonged high-temperature exposure.

Although chrysotile has a different fiber morphology compared to amphibole asbestos varieties such as amosite or crocidolite, regulatory and scientific authorities have established that chrysotile is nonetheless a human carcinogen capable of causing mesothelioma, asbestosis, and lung cancer following inhalation exposure. The U.S. Environmental Protection Agency’s Asbestos Hazard Emergency Response Act (AHERA) framework and OSHA’s asbestos standards apply without distinction to chrysotile-containing products, mandating strict controls on exposure regardless of fiber type.

During the period Insulag was produced and sold, the asbestos content of refractory cements was a standard feature of product formulation rather than an anomaly. Litigation records document that Quigley incorporated asbestos into Insulag through the full span of its production years, from 1963 until 1977.

How Workers Were Exposed

Industrial workers who handled, mixed, applied, or worked in proximity to Quigley Insulag Fireproofing Cement faced potential inhalation exposure to chrysotile asbestos fibers through multiple pathways.

Mixing and Preparation: Because Insulag was typically supplied as a dry powder requiring on-site mixing, the preparation phase presented a significant exposure risk. Pouring, measuring, and mixing dry powdered refractory cement generated airborne dust that could remain suspended in work area air for extended periods. Workers performing these tasks without appropriate respiratory protection were at risk of inhaling asbestos fibers directly during this phase of product use.

Application: Applying the mixed cement to furnace walls, boiler surfaces, pipe insulation, and structural elements involved troweling, hand-packing, or spray application. Each of these methods could disturb or release fibers, particularly when workers applied material overhead or in confined spaces with limited ventilation.

Cutting, Grinding, and Finishing: Once applied and cured, refractory cement surfaces sometimes required cutting, grinding, or smoothing to fit equipment configurations or to make repairs. These mechanical operations on hardened asbestos-containing material were capable of generating respirable fiber concentrations.

Maintenance and Repair Activities: In industrial facilities, refractory linings and fireproofing materials required periodic inspection, repair, and replacement. Workers involved in tearing out or disturbing old Insulag applications during maintenance cycles faced secondary or bystander exposure even if they were not the original applicators.

Bystander and Ambient Exposure: Litigation records document that workers in the vicinity of Insulag application and disturbance activities — including pipefitters, millwrights, electricians, and general plant workers — alleged exposure through ambient contamination of shared workspaces. In industrial facilities where multiple trades worked in close proximity, dust generated by one trade’s activities could affect all personnel present in the area.

Plaintiffs alleged that during the period of Insulag’s production and use, adequate warnings about the health hazards of asbestos exposure were not provided to workers, and that the Quigley Company had knowledge of asbestos health risks that was not communicated to end users of the product. OSHA’s permissible exposure limits for asbestos, first promulgated in 1971 and subsequently revised downward on multiple occasions, reflect the regulatory recognition that occupational asbestos exposure presented serious health risks requiring enforceable workplace controls.