Zonolite Company / W. R. Grace & Co. plant at St. Louis, Missouri

W. R. Grace & Co.'s sworn answers in a 1987 lawsuit, Williams against National Gypsum, list Saint Louis, Missouri, among the plants where its Zonolite Mono-Kote MK-3 fireproofing was made, with approximate dates of 1959-1973, while saying the product "was manufactured at some or all of the plants listed."¹ The same answers say MK-3 was produced by Zonolite Company "from 1959 to 1963" and by Grace "from 1963 until 1973"; they do not say which company ran the Saint Louis plant.¹ Grace described the product as a "Light beige cementitious material" used for fireproofing, with "approximately 13.23 percent 7M" and "12.18 7R" short fiber chrysotile asbestos by weight; those figures describe the product, not the Saint Louis plant's output in particular.¹

Location

Asbestos products made here

The products documents say were made at this plant, with the years a document gives for the product here. Each product's page has what the documents say about it, including its asbestos content.

• Zonolite Mono-Kote Mk-3 (W. R. Grace) · 1959–1973¹

What each document says

Every statement about this plant in the documents, in each document's own words.

W. R. Grace's Answers to Plaintiffs' Interrogatories in Williams v. National Gypsum (1987)

• Asbestos products made: “Zonolite Mono-Kote (MK-3) 1959-1973. "The product was manufactured at some or all of the plants listed below."” (W.R. Grace & Co.), p. 44¹

See also

• Zonolite Company: the company's documents, people, products and plants
• W. R. Grace & Co.: the company's documents, people, products and plants
• Asbestos exposure sites in Missouri

References

1. W. R. Grace's Answers to Plaintiffs' Interrogatories in Williams v. National Gypsum (October 15, 1987), pp. 44–45.