Gun Coat Spray Surfacer by W.R. Grace

Product Description

Gun Coat Spray Surfacer was a spray-applied fireproofing and surfacing material manufactured by W.R. Grace and Company. The product was designed for industrial applications where fire-resistant coatings were required on structural steel, mechanical systems, and building surfaces. Applied using specialized spray equipment — from which the product took its name — Gun Coat was intended to provide thermal protection and surface finishing in heavy industrial and commercial construction environments.

W.R. Grace was one of the dominant players in the spray-applied fireproofing market during the mid-twentieth century, a period when asbestos-containing products were widely specified by architects, engineers, and industrial planners for their fire-resistant and insulating properties. Gun Coat Spray Surfacer was part of a broader portfolio of Grace construction materials that relied on asbestos as a primary functional component. Production of the product is documented through 1973, the year by which regulatory pressure and growing scientific understanding of asbestos hazards began forcing significant reformulation across the industry.

W.R. Grace’s history with asbestos-containing building materials is extensive and well-documented in litigation and regulatory records. The company’s operations included vermiculite mining at Libby, Montana — a site later designated a Superfund location — as well as the manufacture of numerous asbestos-containing construction products sold under various brand names throughout the postwar construction boom.

Asbestos Content

Gun Coat Spray Surfacer contained chrysotile asbestos, the most widely used asbestos fiber type in commercial and industrial products throughout the twentieth century. Chrysotile, sometimes referred to as white asbestos, belongs to the serpentine mineral group and was prized by manufacturers for its flexibility, tensile strength, and resistance to heat and flame.

In spray-applied fireproofing products like Gun Coat, chrysotile asbestos served as the primary fire-resistant and structural binding component. The fiber was typically mixed with binders and other materials to create a sprayable compound that could be applied in varying thicknesses depending on the required fire-resistance rating. Once dried and cured, the asbestos-containing matrix adhered to steel and other substrates, providing the thermal barrier the product was designed to deliver.

Chrysotile has been classified as a known human carcinogen by the International Agency for Research on Cancer (IARC) and is regulated as a hazardous material under multiple federal frameworks, including OSHA’s asbestos standards (29 CFR 1910.1001 and 29 CFR 1926.1101) and the Asbestos Hazard Emergency Response Act (AHERA). There is no documented safe level of occupational exposure to chrysotile asbestos fibers.

How Workers Were Exposed

Industrial workers who handled, applied, or worked in proximity to Gun Coat Spray Surfacer faced significant potential for asbestos fiber exposure across multiple stages of product use.

During mixing and preparation, workers who combined dry Gun Coat material with water or other components could release substantial quantities of airborne chrysotile fibers. The handling of dry powdered asbestos-containing products is among the highest-exposure activities documented in occupational health research, as the mechanical disturbance of loose fiber-containing material readily suspends fine respirable particles in the breathing zone.

During spray application, compressed-air spray equipment designed to project the surfacer material onto structural components generated aerosol conditions that dispersed asbestos-containing particles throughout the immediate work area and beyond. Workers operating spray equipment, as well as other trades and laborers present in the same work areas — often in enclosed or partially enclosed industrial buildings with limited ventilation — could inhale airborne fibers released during the application process. Spray fireproofing application is specifically identified in OSHA and EPA regulatory history as a Class I or high-exposure asbestos activity.

During finishing and remediation, applied Gun Coat material that was later cut, abraded, disturbed during renovation, or removed during industrial maintenance operations could release fibers from the cured but friable product. Spray-applied asbestos fireproofing materials are classified as friable under federal asbestos regulations, meaning that once dried they can be crumbled, pulverized, or reduced to powder by hand pressure, releasing fibers into the air.

Litigation records document that industrial workers who used spray-applied asbestos fireproofing products, including those manufactured by W.R. Grace, were exposed to airborne asbestos fibers in the course of ordinary work activities. Plaintiffs alleged that W.R. Grace knew or should have known of the hazards associated with asbestos-containing products well before the cessation of production and that adequate warnings were not provided to workers or their employers.

The diseases associated with occupational asbestos exposure include mesothelioma, asbestos-related lung cancer, asbestosis, and other pleural conditions. These diseases characteristically have long latency periods — often twenty to fifty years between initial exposure and diagnosis — meaning that workers exposed to Gun Coat Spray Surfacer during its production years through 1973 may only now be receiving diagnoses.

Gun Coat Spray Surfacer is a Tier 2 litigated product. There is no dedicated asbestos bankruptcy trust fund specifically associated with Gun Coat claims. Legal remedies for individuals injured by exposure to this product have been pursued through the civil court system.

Civil Litigation

Litigation records document claims filed against W.R. Grace and Company by plaintiffs alleging injury from exposure to asbestos-containing products, including spray-applied fireproofing materials manufactured and sold by the company. Plaintiffs alleged causes of action including negligence, failure to warn, strict products liability, and in some cases fraud based on allegations that the company concealed known hazards from workers and the public.

W.R. Grace filed for Chapter 11 bankruptcy protection in 2001, in part due to the volume of asbestos personal injury claims pending against the company. As part of its reorganization proceedings under the U.S. Bankruptcy Code, a resolution framework for asbestos-related claims was developed. Individuals with claims arising from Grace asbestos products should consult with qualified asbestos litigation counsel to evaluate whether and how the Grace bankruptcy proceedings affect their legal options, including any applicable deadlines or claim submission requirements.

Steps for Affected Workers

Industrial workers, their family members, or the estates of deceased workers who believe they were exposed to Gun Coat Spray Surfacer should:

  • Consult a physician experienced in asbestos-related disease for diagnostic evaluation
  • Document employment history, job sites, and specific product exposures as thoroughly as possible
  • Contact an attorney with demonstrated experience in asbestos personal injury litigation to evaluate applicable legal claims and statutes of limitations

Given the long latency period of asbestos-related diseases and the procedural complexities associated with asbestos litigation and bankruptcy proceedings, early consultation with legal counsel is strongly advisable. Statutes of limitations vary by state and typically begin running from the date of diagnosis or the date a claimant knew or reasonably should have known of the connection between their illness and asbestos exposure.