Sindanyo Asbestos Electric Arc and Heating Resisting Board

Sindanyo Asbestos Electric Arc and Heating Resisting Board was a specialty industrial material manufactured and distributed under the Atlas Brakes product line. Engineered to withstand extreme thermal conditions — including direct exposure to electric arcs and sustained high heat — this board was a fixture in industrial environments where conventional insulating materials would fail. Although it served a legitimate engineering purpose, the product’s reliance on chrysotile asbestos as a primary binding and insulating agent placed generations of industrial workers at serious risk of asbestos-related disease.

Product Description

Sindanyo was a well-recognized trade name applied to a family of asbestos-cement composite boards used primarily in electrical and high-heat industrial applications. The Electric Arc and Heating Resisting variant was specifically formulated for environments where temperatures and electrical conditions demanded exceptional material durability. Applications included electrical switchgear panels, arc chutes, arc shields, furnace linings, industrial heating equipment housings, and related thermal barrier installations.

The board was rigid, dense, and capable of resisting not only high temperatures but also the plasma discharge of electric arcs — a hazard in high-voltage switching environments. Its dimensional stability under heat made it a preferred material for equipment manufacturers, industrial facilities, and electrical contractors throughout much of the twentieth century.

Although the precise start of production is not fully documented in the public record, the product was commercially available through at least the early 1980s, when regulatory pressure and mounting liability concerns began driving manufacturers away from asbestos-containing materials. Atlas Brakes served as the manufacturer and distributor associated with this product line, marketing it to industrial clients across a range of heavy industries.

Asbestos Content

Sindanyo Asbestos Electric Arc and Heating Resisting Board contained chrysotile asbestos (white asbestos), the most commonly used asbestos fiber type in manufactured products throughout the twentieth century. In asbestos-cement board products of this class, chrysotile fibers were typically integrated throughout the board’s matrix, serving multiple functional roles: binding the composite material together, providing tensile reinforcement, and contributing directly to the product’s thermal and electrical insulating properties.

Chrysotile fibers are notably fine and highly respirable. When asbestos-cement board is cut, drilled, sanded, broken, or otherwise disturbed, chrysotile fibers are released into the surrounding air. Despite being classified as a “serpentine” asbestos fiber — a distinction sometimes incorrectly used to imply lower toxicity — chrysotile asbestos is recognized by OSHA, the EPA, the International Agency for Research on Cancer (IARC), and other authoritative bodies as a confirmed human carcinogen capable of causing mesothelioma, asbestosis, and lung cancer.

AHERA (the Asbestos Hazard Emergency Response Act) and related federal regulations govern the identification, management, and disposal of asbestos-containing materials, including rigid asbestos-cement composites such as those in the Sindanyo product family. Products of this type fall within the category of friable asbestos materials when disturbed during installation, modification, or removal.

How Workers Were Exposed

Industrial workers represent the primary population documented as having been exposed to Sindanyo Asbestos Electric Arc and Heating Resisting Board. Exposure pathways varied depending on the worker’s role in the product’s lifecycle — from initial fabrication and installation to ongoing maintenance and eventual removal.

Fabrication and installation presented the most acute exposure risk. Workers who cut the board to size using saws, drills, or grinding tools generated substantial quantities of airborne asbestos dust. The dry, rigid nature of the material meant that cutting operations could release dense concentrations of chrysotile fibers into the immediate work environment. In enclosed spaces — such as electrical vaults, equipment rooms, or industrial machine shops — those fibers could remain suspended in breathable air for extended periods.

Maintenance and repair activities also generated significant exposure. Industrial electricians, maintenance technicians, and equipment repair workers who disturbed existing Sindanyo board installations — whether by removing old panels, trimming installed components, or replacing worn arc shields — were exposed to fibers released from aging, potentially friable material. Older asbestos-cement board that had been subjected to repeated thermal cycling or physical stress was particularly likely to release fibers when handled.

Proximity exposure affected workers who were present in the same areas as those performing primary cutting or removal tasks, even if they were not directly handling the material. In industrial facilities with open floor plans or shared workspaces, secondhand asbestos exposure was a common and well-documented hazard.

Across all of these scenarios, workers generally had little or no protective equipment specifically designed to guard against fine asbestos fibers. Respiratory protection capable of filtering chrysotile asbestos was not routinely provided or required during much of the period when this product was in active use. Regulatory standards establishing permissible exposure limits for asbestos were not enacted until the 1970s, meaning that workers exposed during the earlier decades of the product’s availability had no enforceable protections in place at the time of their exposure.

Documented Trust Fund / Legal Options

Sindanyo Asbestos Electric Arc and Heating Resisting Board is a Tier 2 product, meaning it is associated with civil litigation rather than a dedicated asbestos bankruptcy trust fund. No asbestos trust fund has been established specifically to compensate claimants for injuries related to this product.

Litigation records document claims brought by industrial workers and their families alleging injury from exposure to Sindanyo and comparable asbestos-cement board products. Plaintiffs alleged that manufacturers and distributors, including those associated with the Atlas Brakes product line, knew or should have known of the health hazards presented by chrysotile asbestos and failed to adequately warn workers or provide appropriate safety guidance.

Plaintiffs in asbestos litigation involving products of this type have generally pursued claims under theories of negligence, strict products liability, and failure to warn. Litigation records document that claimants have included electricians, maintenance workers, and other industrial tradespeople who worked with or around asbestos-containing electrical and thermal equipment over extended careers.

Individuals who may have legal remedies include:

• Industrial workers who fabricated, installed, maintained, or removed Sindanyo board products
• Workers with documented diagnoses of mesothelioma, asbestosis, lung cancer, or other asbestos-related diseases
• Family members of deceased workers who suffered asbestos-related illness

Because no dedicated trust fund exists for this product, claims must be pursued through the civil court system. Applicable statutes of limitations vary by state and begin running from the date of diagnosis or the date a claimant reasonably knew or should have known of the connection between their illness and asbestos exposure. Individuals with potential claims are strongly advised to consult a qualified asbestos litigation attorney promptly to preserve their legal rights.

Documentation that may support a legal claim includes employment records, union membership records, industrial hygiene reports, co-worker testimony, and any product identification records linking a specific worksite to Sindanyo Asbestos Electric Arc and Heating Resisting Board.