Careytemp Block Insulation

Careytemp Block Insulation was a rigid thermal insulation product manufactured by Celotex Corporation and sold primarily for industrial pipe and equipment insulation applications. Produced during a span of approximately eleven years, from 1958 through 1969, Careytemp Block represented one of several asbestos-containing insulation lines that Celotex marketed to industrial facilities across the United States. Because the product was in active use well beyond its manufacturing window — often remaining in place for decades after installation — workers encountered it throughout the latter half of the twentieth century, long after the product had been discontinued.

Product Description

Careytemp Block Insulation was engineered as a high-temperature rigid block material intended to insulate pipes, boilers, vessels, and related industrial equipment. The “block” format distinguished it from blanket or spray-applied insulation products; sections were pre-formed to fit around pipe diameters and equipment contours, then secured with wiring, banding, or adhesive jacketing. This form factor was favored in industrial settings because rigid block insulation offered dimensional stability, ease of replacement, and the ability to withstand the mechanical stresses common in operating plants.

Celotex Corporation, at the time one of the larger building and insulation products manufacturers in the United States, marketed Careytemp Block to industries that operated high-temperature systems — including chemical processing, petroleum refining, power generation, and heavy manufacturing. The product was sold under the Celotex brand following the company’s acquisition of the Philip Carey Manufacturing Company’s product lines, a lineage reflected in the “Carey” prefix retained in the product name.

Careytemp Block was produced during a period when the thermal insulation industry relied heavily on asbestos mineral fiber as a primary ingredient. Asbestos offered a combination of properties — resistance to heat, dimensional stability, fiber reinforcement, and low cost — that manufacturers considered difficult to match with alternative materials available at the time.

Asbestos Content

Careytemp Block Insulation contained chrysotile asbestos, the most widely used commercial asbestos fiber type throughout the twentieth century. Chrysotile, a serpentine mineral fiber, was incorporated into the rigid block matrix to provide heat resistance, structural integrity, and binding characteristics that allowed the product to hold its pre-formed shape under thermal cycling and mechanical stress.

In rigid block insulation products of this era, asbestos fiber content was typically substantial — often representing a significant portion of the product’s total dry composition by weight — because the fiber served a structural as well as thermal function within the block matrix. The fiber was combined with binding agents, fillers, and in some formulations, calcium silicate or other mineral components to produce the finished block sections.

Although chrysotile is sometimes described in industry literature as less biopersistent than amphibole asbestos fiber types, regulatory and scientific authorities including the U.S. Environmental Protection Agency (EPA) and the International Agency for Research on Cancer (IARC) classify all asbestos fiber types, including chrysotile, as known human carcinogens. No established safe level of occupational exposure to chrysotile asbestos has been identified in the peer-reviewed literature.

How Workers Were Exposed

Industrial workers who handled, installed, maintained, or removed Careytemp Block Insulation represent the population most directly at risk for asbestos fiber exposure from this product. The rigid block format, while considered more contained than loose-fill or spray-applied products under undisturbed conditions, generated substantial airborne fiber when subjected to the cutting, fitting, sanding, sawing, and trimming operations that were routine during installation.

Installation activities required workers to cut block sections to fit irregular pipe dimensions and equipment contours. Sawing and hand-cutting asbestos-containing rigid block released visible dust and fine airborne fibers into the breathing zone of the worker performing the cut, as well as bystanders working nearby in the same area.

Maintenance and repair operations were particularly hazardous because older installed insulation becomes more friable — more easily crumbled and disturbed — over time and with repeated thermal cycling. Workers removing deteriorated Careytemp Block sections for replacement, or breaking apart damaged sections to access underlying pipe, encountered material that could release fiber with minimal mechanical force.

Bystander exposure was a consistent feature of industrial work environments where insulation work occurred alongside other trades. Pipefitters, boilermakers, maintenance mechanics, and general laborers working in the vicinity of insulation installation or removal were exposed to airborne fibers without directly handling the product.

Litigation records document that Careytemp Block remained in service at industrial facilities well into the 1970s, 1980s, and in some cases beyond — meaning that the exposure window for maintenance and removal workers extended significantly past the product’s 1969 manufacturing end date. Workers performing renovation, demolition, or scheduled maintenance at older industrial plants encountered legacy Careytemp Block installations decades after Celotex had discontinued the product line.

Plaintiffs alleged in litigation proceedings that industrial workers were not provided with adequate warnings about the health hazards associated with asbestos fiber exposure during the period the product was marketed and in routine use. At the time of the product’s manufacture and primary use period, the occupational health consequences of asbestos exposure — including mesothelioma, asbestosis, and asbestos-related lung cancer — were documented in the medical and industrial hygiene literature, but widespread hazard communication to workers in industrial settings lagged substantially behind that knowledge.

Careytemp Block Insulation is a Tier 2 litigated product. No dedicated asbestos bankruptcy trust fund exists for claims arising specifically from Celotex Corporation’s Careytemp product line under a structure that accepts new claims at this time. Workers and surviving family members seeking legal remedies for asbestos-related disease attributed to Careytemp Block exposure have pursued their claims primarily through civil litigation in state and federal courts.

Litigation records document claims filed by industrial workers — and in wrongful death matters, by their surviving spouses and dependents — alleging that exposure to Careytemp Block Insulation contributed to the development of mesothelioma, lung cancer, asbestosis, and other asbestos-related diseases. Plaintiffs alleged that Celotex Corporation knew or had reason to know of the health hazards associated with asbestos fiber in its insulation products and failed to provide adequate warnings or safety instructions to foreseeable end users.

Individuals who may have legal options include:

  • Industrial workers with documented occupational exposure to Careytemp Block Insulation during installation, maintenance, or removal operations
  • Workers employed at facilities where Careytemp Block was used who were present in areas where the product was being cut, trimmed, or disturbed
  • Surviving family members of deceased workers with a documented diagnosis of mesothelioma or other asbestos-related disease

Because asbestos-related diseases, particularly mesothelioma, carry statutes of limitations that vary by jurisdiction and typically run from the date of diagnosis rather than the date of exposure, individuals with potential claims are advised to consult with an attorney experienced in asbestos litigation promptly following a relevant diagnosis. Multi-defendant asbestos litigation commonly names numerous manufacturers and suppliers, and the presence of exposure to multiple products does not bar recovery for exposure attributed to any individual product.

Information presented in this article is drawn from publicly available litigation records, regulatory documentation, and historical product records. It is provided for reference purposes and does not constitute legal advice.