Armatemp Cement No. 10

Product Description

Armatemp Cement No. 10 was an industrial-grade cement product manufactured by ACS (Asbestos Cement and Specialty Products). The product was marketed and sold for use in high-temperature industrial environments, where its formulation was intended to provide thermal protection, structural bonding, and fire resistance across a range of demanding applications.

Based on its product name and documented industrial use, Armatemp Cement No. 10 fell within a class of specialty cements engineered to withstand extreme heat. Products in this category were widely used throughout the twentieth century in industrial facilities such as steel mills, refineries, power generating stations, chemical processing plants, and heavy manufacturing operations. They served multiple functional roles depending on the application, including pipe insulation, refractory lining, and spray-applied fireproofing — the three primary categories under which this product has been documented in litigation records.

Refractory cements of this type were typically applied to furnace walls, boiler interiors, kilns, and other high-heat structures where ordinary concrete or mortar would fail. As a pipe insulation product, similar cements were troweled or cast around steam pipes, hot water lines, and process piping to reduce heat loss and protect surrounding structures. As a spray-applied fireproofing material, comparable formulations were applied to structural steel, decking, and other building components to meet fire resistance requirements in industrial and commercial construction.

The precise years of production for Armatemp Cement No. 10 have not been independently verified in available public records, but products of this class were in common industrial use from at least the mid-twentieth century through the 1970s and into the early 1980s, when regulatory pressure began to curtail the use of asbestos-containing construction and industrial materials.

Asbestos Content

Litigation records document that Armatemp Cement No. 10 contained asbestos as a component of its formulation. The inclusion of asbestos in industrial cements of this type was standard practice during much of the product’s production era. Asbestos fibers were prized by manufacturers of refractory and thermal insulation products because they provided exceptional heat resistance, tensile reinforcement, and resistance to chemical degradation — properties that were difficult or impossible to achieve with substitute materials available at the time.

In industrial cement products, asbestos was typically incorporated in fibrous form, blended with binding agents such as Portland cement or sodium silicate, and combined with other mineral fillers. The resulting mixture could be troweled, cast, or spray-applied depending on the intended use. When set and undisturbed, such materials presented a lower risk of fiber release. However, the hazard was dramatically elevated during mixing, application, cutting, sanding, or any disturbance of the cured material — activities that were routine in the trades where this product was used.

Plaintiffs alleged in civil litigation that ACS was aware, or should have been aware, that asbestos-containing products such as Armatemp Cement No. 10 posed serious health risks to workers who handled or were exposed to them, and that adequate warnings were not provided.

How Workers Were Exposed

Industrial workers who handled, applied, or worked in proximity to Armatemp Cement No. 10 were at risk of asbestos fiber inhalation. Litigation records document that exposure occurred across a range of tasks and settings connected to this product’s use.

Mixing and Preparation: Workers who mixed dry or semi-dry cement formulations were exposed to airborne asbestos fibers released during the blending process. Bag emptying, stirring, and mechanical mixing all generated fiber-laden dust in enclosed or poorly ventilated work areas.

Application: Trowelers, insulators, and other tradespeople who applied refractory or insulating cements directly to pipes, boiler surfaces, furnace linings, or structural steel were exposed during the application process, particularly when working in confined spaces such as boiler rooms, tunnels, or vessel interiors.

Spray Fireproofing Operations: Workers who applied spray-applied fireproofing using this class of product, as well as other tradespeople working in the same area during or immediately after spray application, were exposed to high concentrations of airborne fibers. Bystander exposure was a recurring issue documented in industrial fireproofing operations.

Repair and Removal: Workers who later repaired, removed, or disturbed previously applied refractory cement were exposed to fibers released from the degraded or fractured material. Demolition workers, maintenance personnel, and boilermakers were among those documented in litigation records as having performed these tasks.

Downstream Exposure: In industrial facility environments, workers in adjacent trades — pipefitters, electricians, millwrights, and general laborers — could be exposed to asbestos fibers disturbed by nearby insulation or refractory work, even if they did not directly handle the product themselves.

Diseases associated with occupational asbestos exposure include mesothelioma, asbestos-related lung cancer, asbestosis, and pleural disease. These conditions typically have latency periods of twenty to fifty years, meaning many individuals exposed decades ago are only now receiving diagnoses.