Kaylo-10 Pipe and Block Insulation (Owens Corning)

Kaylo-10 pipe and block insulation was one of the most widely used thermal insulation products in American industrial construction during the mid-twentieth century. Manufactured by Owens Corning, Kaylo-10 contained asbestos as a primary component of its composition. Workers who handled, cut, applied, or removed this product faced significant asbestos fiber exposure, and the product has been the subject of extensive asbestos personal injury litigation and trust fund claims. The Owens Corning Fibreboard Asbestos PI Trust was established to compensate individuals harmed by Owens Corning asbestos-containing products, including Kaylo-10.

Product Description

Kaylo-10 was a calcium silicate-based insulation product manufactured by Owens Corning and sold under the Kaylo trade name. It was produced in two primary forms: pipe covering and block insulation. Pipe covering sections were pre-formed to fit around pipes of various diameters, while block insulation was used to cover flat surfaces such as boiler housings, tanks, vessels, and other industrial equipment requiring high-temperature thermal protection.

Kaylo insulation products were designed to perform at elevated temperatures and were marketed extensively to industrial facilities, including power plants, oil refineries, chemical plants, shipyards, and manufacturing facilities. The Kaylo line became a standard specification product in many industrial construction and maintenance contexts throughout the mid-twentieth century.

Owens Corning acquired the Kaylo product line and continued its manufacture and distribution over a period that spanned decades. The product was sold through insulation contractors and distributors across the United States, and it was installed on piping systems, boilers, and related industrial infrastructure throughout the country. Because of its widespread use and documented asbestos content, Kaylo-10 has been identified in a substantial volume of asbestos personal injury claims.

Asbestos Content

Kaylo-10 pipe and block insulation contained asbestos as a functional component of its formulation. Asbestos fibers were incorporated into the product to enhance its thermal resistance, structural integrity, and durability under the high-temperature conditions typical of industrial applications. This was consistent with the broader industry practice during the mid-twentieth century, when asbestos was widely regarded as an ideal reinforcing and insulating material.

Documentation supporting the asbestos content of Kaylo-10 has been established through product testing records, internal corporate documents produced during litigation, and the qualifying product criteria maintained by the Owens Corning Fibreboard Asbestos PI Trust. The trust’s claims-processing procedures recognize Kaylo-10 as an asbestos-containing product manufactured by Owens Corning, and claims referencing this product are eligible for review under the trust’s established criteria.

The presence of asbestos in calcium silicate insulation products such as Kaylo-10 was not publicly disclosed to workers or end users in a manner consistent with the known hazards of asbestos exposure. Internal industry knowledge regarding the health risks associated with asbestos predated the widespread regulatory and public attention the hazard received in later decades.

How Workers Were Exposed

Workers encountered Kaylo-10 in several distinct exposure pathways that corresponded to the tasks involved in handling, installing, and removing the product.

Fabrication and Fitting: Pipe covering sections required cutting and trimming to fit the dimensions of specific piping runs. Workers using handsaws, knives, or power tools to cut Kaylo-10 sections generated significant quantities of airborne dust. This dust contained respirable asbestos fibers released from the cut faces and broken edges of the insulation material.

Mixing and Application: In applications involving block insulation, workers sometimes broke or shaped sections to conform to irregular surfaces. These activities generated fiber-laden dust in the immediate work area. In environments where Kaylo products were applied in conjunction with finishing cements or coatings, additional mixing and application tasks created further exposure opportunities.

Removal and Demolition: Workers engaged in maintenance, repair, and renovation activities at industrial facilities frequently encountered existing Kaylo-10 insulation in place on pipes and equipment. Removal of aged or damaged insulation—particularly material that had become friable over time—released concentrated amounts of asbestos dust. Maintenance workers, pipefitters, and industrial laborers performing this work often did so without respiratory protection appropriate to the hazard.

Bystander Exposure: Workers in the vicinity of insulation operations who were not directly handling Kaylo-10 were also exposed to airborne fibers dispersed through ventilation systems, ambient air movement, and the general accumulation of dust in confined industrial spaces such as boiler rooms, engine rooms, and pipe chases.

Industrial workers generally—including pipefitters, boilermakers, steamfitters, millwrights, maintenance mechanics, and general laborers employed in heavy industry—have been identified in trust fund and litigation records as individuals with documented occupational exposure to Kaylo-10 and related Kaylo-line products. Power plant workers and refinery personnel who spent careers working in environments where Kaylo insulation was installed, maintained, or replaced represent a significant portion of the affected population.