Damit Joint Sealant

Product Description

Damit Joint Sealant was a fiber-reinforced sealing compound manufactured by the Quigley Company and produced from approximately 1940 through 1970. Quigley was a well-established industrial materials supplier whose product line focused on high-temperature and high-pressure sealing applications across heavy industry. The Damit brand name was applied to a line of joint sealants intended to create durable, compression-resistant seals at flanged pipe connections, vessel joints, and other industrial mating surfaces where conventional materials might fail under thermal or mechanical stress.

Products in the Damit line were formulated to remain pliable enough for application while curing into a stable seal capable of withstanding the demanding environments found in refineries, chemical processing plants, power generation facilities, and heavy manufacturing operations. During the mid-twentieth century, fiber reinforcement using mineral materials was standard practice in such sealant compounds, and the Quigley Company incorporated chrysotile asbestos into the Damit formulation to achieve the thermal resistance and structural integrity that industrial buyers required.

Damit Joint Sealant was sold to industrial facilities and to tradespeople and supply houses that served those facilities. Its decades-long production window—spanning the 1940s through 1970—placed it in active use throughout the postwar industrial expansion, a period characterized by aggressive construction of new refineries, power plants, and manufacturing infrastructure across the United States.

Asbestos Content

Damit Joint Sealant contained chrysotile asbestos as a reinforcing fiber component. Chrysotile, sometimes called white asbestos, is the most widely used form of asbestos in commercial and industrial products and belongs to the serpentine mineralogical family. While chrysotile fibers are structurally distinct from the amphibole varieties such as amosite or crocidolite, decades of scientific and regulatory findings have established that chrysotile asbestos poses serious health risks when fibers become airborne and are inhaled.

The U.S. Environmental Protection Agency’s Asbestos Hazard Emergency Response Act (AHERA) framework and the Occupational Safety and Health Administration (OSHA) asbestos standards both treat chrysotile as a known human carcinogen subject to stringent exposure controls. OSHA’s permissible exposure limit for asbestos—set at 0.1 fibers per cubic centimeter of air as an eight-hour time-weighted average—applies regardless of asbestos fiber type, reflecting the recognized danger of chrysotile at occupational exposure levels.

In joint sealant products such as Damit, chrysotile fibers were integrated into the compound matrix to improve tensile strength and thermal stability. This integration did not render the fibers permanently inert. Under conditions of application, removal, or disturbance, the sealant material could release respirable asbestos fibers into the breathing zone of workers handling or working nearby the product.

How Workers Were Exposed

Industrial workers generally represent the primary population documented as having been exposed to asbestos through contact with Damit Joint Sealant. The exposure pathways associated with this type of product are closely tied to the lifecycle of sealing compounds in industrial settings: initial application, long-term service, and eventual removal or replacement.

Application. Workers applying Damit Joint Sealant to flanged pipe connections or vessel joints handled the compound directly. Cutting or shaping sealant material to fit a joint, pressing it into place, and trimming excess material were all activities capable of generating dust containing chrysotile fibers. In poorly ventilated equipment rooms or confined spaces—common in older industrial facilities—airborne fiber concentrations could reach hazardous levels.

Maintenance and Re-entry. Industrial joints sealed with asbestos-containing compounds required periodic inspection, pressure testing, and valve or flange maintenance. Workers performing these tasks disturbed the cured sealant, potentially fracturing it and releasing embedded fibers. Pipefitters, maintenance mechanics, and boilermakers who returned repeatedly to the same equipment over years or decades faced cumulative exposure through these re-entry activities.

Removal and Replacement. Among the most hazardous phases of a sealant’s service life is removal. Chiseling, scraping, or wire-brushing hardened joint sealant from flange faces was a physically aggressive process that could generate significant quantities of asbestos-laden dust. Workers performing this work—often without respiratory protection appropriate for asbestos exposure, particularly in the decades before OSHA’s asbestos standards were promulgated—faced direct and concentrated inhalation exposure.

Bystander Exposure. In industrial environments, exposure was not limited to the individual applying or removing sealant. Workers in adjacent areas who were not directly involved in joint sealing tasks could nonetheless inhale asbestos fibers that became airborne and migrated through shared workspaces, ventilation systems, or open plant floors.

The diseases associated with occupational asbestos exposure include mesothelioma, a malignant cancer of the mesothelial lining of the lungs, abdomen, or heart; asbestosis, a progressive scarring of lung tissue; lung cancer; and other related conditions. These diseases typically have latency periods measured in decades, meaning workers exposed to Damit Joint Sealant during its production years of 1940 through 1970 may not have received a diagnosis until well into the late twentieth or early twenty-first century.

Documented Trust Fund / Legal Options

Damit Joint Sealant does not have an associated asbestos bankruptcy trust fund. The Quigley Company pursued its own separate bankruptcy proceedings related to asbestos liability, and individuals seeking compensation in connection with Quigley products should consult an experienced asbestos attorney to evaluate the current status of any Quigley-related legal or trust mechanisms and whether eligibility criteria apply to their circumstances.

For Damit Joint Sealant specifically, litigation records document claims brought by industrial workers who alleged asbestos-related disease resulting from occupational exposure to the product. Plaintiffs alleged that the Quigley Company knew or should have known of the health hazards posed by asbestos-containing sealant products and failed to provide adequate warnings to workers who handled Damit Joint Sealant in industrial settings. Plaintiffs further alleged that this failure to warn deprived workers of the opportunity to take protective measures that might have reduced or prevented their asbestos exposure.

Litigation records document claims spanning multiple disease categories, including mesothelioma and lung cancer, filed by workers or their survivors who identified Damit Joint Sealant as one of the asbestos-containing products encountered during their careers in industrial facilities.

Individuals who believe they may have been exposed to asbestos through contact with Damit Joint Sealant, or family members of deceased workers with such exposure history, are encouraged to consult a qualified asbestos litigation attorney. An attorney with experience in asbestos cases can evaluate the full exposure history, identify all potentially liable parties and available compensation sources—including any applicable trust funds, active litigation venues, or other legal remedies—and advise on applicable statutes of limitations, which vary by state and by disease type.

Documentation of work history, employer records, co-worker affidavits, and any available product identification evidence will support the evaluation of a potential claim.