Insuline Refractory Cement (Quigley Company)

Insuline Refractory Cement was a high-temperature bonding and patching material manufactured by the Quigley Company during the mid-twentieth century. Designed for use in industrial furnaces, kilns, boilers, and other extreme-heat environments, the product was formulated to withstand the thermal stresses that conventional cements could not endure. Like many refractory products of its era, Insuline Refractory Cement incorporated asbestos fibers as a key functional ingredient — a practice that was widespread across the refractory manufacturing industry from the 1940s through the 1970s. Workers who handled, applied, or worked in proximity to this material during those decades may have sustained significant asbestos exposure with lasting health consequences.

Product Description

Insuline Refractory Cement was produced by the Quigley Company, a New York-based manufacturer with a substantial catalog of refractory and insulating products sold primarily to industrial markets. The product was intended for high-temperature applications where standard Portland or masonry cements would fail — specifically for lining, sealing, and repairing furnaces, boilers, incinerators, and industrial process equipment operating at elevated temperatures.

The cement was marketed and distributed across a range of heavy industries, including steel production, chemical processing, and power generation, during its approximate production span of 1940 to 1970. Refractory cements of this type were considered essential maintenance and construction materials in facilities where continuous high-heat operations were standard. Quigley Company products, including Insuline Refractory Cement, appeared in industrial supply catalogs and were sold to contractors and facilities managers responsible for maintaining thermal equipment.

The product was typically supplied in dry powder or pre-mixed paste form, packaged in bags or pails for workplace use. Workers would mix, trowel, or otherwise apply the cement to refractory surfaces during installation, repair, and maintenance operations.

Asbestos Content

Insuline Refractory Cement contained chrysotile asbestos, the most commercially prevalent form of asbestos used in twentieth-century American industry. Chrysotile, also known as white asbestos, was valued in refractory formulations for its thermal stability, tensile strength, and resistance to chemical degradation at high temperatures. These properties made it an attractive additive for manufacturers seeking to extend the functional temperature range and durability of their cement products.

Chrysotile asbestos consists of fine, curly fibers that, when disturbed, can release microscopic particles into the air. Regulatory and medical science has established that inhalation of chrysotile fibers is associated with serious and potentially fatal diseases, including mesothelioma, asbestosis, and lung cancer. The latency period for asbestos-related diseases typically spans several decades, meaning that workers exposed to Insuline Refractory Cement during the product’s years of manufacture and use may not have developed symptoms until many years after their exposure occurred.

The inclusion of asbestos in refractory cement products was a well-documented industry practice regulated under the Asbestos Hazard Emergency Response Act (AHERA) and, subsequently, under OSHA’s asbestos standards, which established permissible exposure limits and required hazard communication for asbestos-containing materials in the workplace.

How Workers Were Exposed

The primary population at risk of exposure to Insuline Refractory Cement includes industrial workers generally — a broad category encompassing those employed in the heavy manufacturing, utility, and process industries where refractory cements were routinely used between 1940 and 1970.

Exposure pathways associated with refractory cement products of this type typically included:

  • Mixing and preparation: Dry refractory cement powders, when poured, scooped, or mechanically blended, released airborne asbestos fibers in concentrations that could substantially exceed safe thresholds. Workers who prepared batches of Insuline Refractory Cement for application were among those most directly exposed.

  • Application and troweling: Applying the cement to furnace linings, boiler walls, or kiln interiors involved close physical contact with the material. Handling wet or partially set cement and finishing surfaces by trowel or hand could release fiber-laden dust, particularly when working in confined or poorly ventilated spaces.

  • Cutting, chipping, and removal: During repair and maintenance operations, previously applied refractory cement was frequently broken out, chipped, or ground away to allow re-lining. These activities were among the most hazardous, generating high concentrations of respirable asbestos dust from both the cement itself and from surrounding refractory materials.

  • Bystander and co-worker exposure: Workers performing tasks in proximity to others applying or removing refractory cement — including boilermakers, pipefitters, millwrights, and general laborers — could inhale airborne fibers without directly handling the product.

Ventilation in many industrial facilities during the mid-twentieth century was inadequate for controlling fine particulate matter, and respiratory protective equipment was not consistently provided or required. Workers were often unaware that the cements they were using contained hazardous materials.

This article is provided for informational and reference purposes. It is based on documented product records, litigation history, and regulatory materials. It does not constitute legal advice. Individuals seeking legal remedies should consult a qualified attorney.