Documents in our library describe Pitseal (Hermetic Materials) as “asbestos jointing for gasketing”.1 They give it as sold from 1957.1,2 It was rated for temperatures up to 450 °F.3 Where the documents differ, each is listed below with its source.
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Pictures
How Pitseal (Hermetic Materials) looked: a label, photograph or catalog page from our library. Each picture has its own page and library number, so it can be cited on its own.
What each document says
Every statement about Pitseal (Hermetic Materials) in the documents, in each document's own words.
USPTO trademark case files (Trademark Full Text XML Data, Annual Applications, 2025 edition)
Label: Genuine "Pitseal" (Hermetic Materials Ltd.), Image
- Sold from: “Date of First Use in Commerce: July, 1957”, said by Hermetic Materials Ltd., as recorded by U.S. Patent Office trademark file2
Asbestos Magazine, 1969, September 1969
- Ingredient: “long-strand asbestos fibers which are interwoven with white alloy wire containing a special imported graphite”, said by Industrial Hermetic Materials, Inc., as recorded by Asbestos (magazine), p. 313
- Temperature limit: “temperatures to 450°F”, said by Industrial Hermetic Materials, Inc., as recorded by Asbestos (magazine), p. 313
- Description: “an emergency gasketing material that will become semi-plastic with the natural heat generated by the metal surfaces”, said by Industrial Hermetic Materials, Inc., as recorded by Asbestos (magazine), p. 313
- Use: “for use where a flange or a joint is badly pitted, scored or distorted”, said by Industrial Hermetic Materials, Inc., as recorded by Asbestos (magazine), p. 313
Kind of product
We list Pitseal (Hermetic Materials) with gaskets and packing, from how the documents describe it. That page explains how such products exposed workers.
Trades that worked with products like it: Pipefitters and Plumbers, Millwrights, Machinists, and Industrial Mechanics.
Other gaskets and packing by Hermetic Materials Ltd. (1)
Gaskets and packing by other makers (210)
Sal-mo (Nicolet) · Flexatallic (Flexatalic Gasket Corp.) · Jewett (Johns-Manville) · Spirotallic (Johns-Manville) · Aztec (Asbestos Textile Co.) · Palmetto Cutno (Greene Tweed & Co.) · Palmetto Plastic (Greene Tweed & Co.) · Palmetto Super Sheet (Greene Tweed & Co.) · Pamco (Phoenix Gasket & Packing) · Panacea (Prince Rubber Company) · Pars (Pars Manufacturing) · Permanite (TBA Industrial Products) · Pivot (Beldam Packing & Rubber Company) · Plastic (Greene Tweed & Co.) · Powerite (Argo Asbestos & Rubber) · Pucaro (Presspan-Fabrik Chr. Authenrieth) · Pyroid (Raybestos-Manhattan) · R/M E-66 (Raybestos-Manhattan) · Railroad Brake Shoes (Johns-Manville) · Ray-Mold (Raybestos-Manhattan) · and 190 more: all gaskets and packing
References
- USPTO trademark case files (Trademark Full Text XML Data, Annual Applications, 2025 edition) (October 14, 1960). Not yet published in our library.
- Label: Genuine "Pitseal" (Hermetic Materials Ltd.), Image.
- Asbestos Magazine, 1969, September 1969 (September 1, 1969), p. 31.
Mentioned on this site
Cite this page
“Pitseal (Hermetic Materials).” AsbestosClaims.Law Library. https://asbestosclaims.law/library/products/hermetic-materials-pitseal.
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