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Enduro (Ehret Magnesia Manufacturing Co.)

Documents in our library describe Enduro (Ehret Magnesia Manufacturing Co.) as “the inner layer of high, heat-resisting enduro and outer layer of efficient 85% magnesia ... enduro has an extremely low percentage of shrinkage due to the use of pre-calcined diatomacious earth”.1 They give it as made 1924–1955.2 The asbestos named is amosite. It was rated for temperatures up to 2000 °F.3 Where the documents differ, each is listed below with its source.

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What each document says

Every statement about Enduro (Ehret Magnesia Manufacturing Co.) in the documents, in each document's own words.

Asbestos Magazine, 1935, March 1935

  • Description: “The inner layer of high, heat-resisting ENDURO and outer layer of efficient 85% Magnesia ... ENDURO has an extremely low percentage of shrinkage due to the use of pre-calcined diatomacious earth”, p. 431

Asbestos; Publication of Identifying Information (1990)

  • Asbestos content: “Enduro is believed to have contained a blend of 1.1% No. 373 chrysotile asbestos and 8.7% amosite fiber”, said by Keene Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 112
  • Made from: “Enduro Pipe Covering and Block Cement (produced 1924 to 1955 by Ehret)”, said by Keene Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 112
  • Asbestos fiber: “1.1% No. 373 chrysotile asbestos and 8.7% amosite fiber”, said by Keene Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 112

Asbestos Magazine, 1938, June 1938

  • Temperature limit: “FOR TEMPERATURES FROM 600° TO 2000°F”, p. 23

Military Qualified Products List (1951–1995)

  • Made at: “Ehret Magnesia Mfg. Co. Valley Forge, Pa. Plant: Same address” (as of 1959), p. 554

85% Magnesia Insulation Manual, Second Edition (c. 1956)

  • Description: “DIATOMACEOUS SILICA INSULATION ... Enduro ... Ehret Magnesia Manufacturing Company”, p. 705
  • Description: “high-temperature block: diatoms & asbestos”, p. 746

Kind of product

We list Enduro (Ehret Magnesia Manufacturing Co.) with pipe covering and block insulation, from how the documents describe it. That page explains how such products exposed workers.

Trades that worked with products like it: Insulators and Insulation Workers, Pipefitters and Plumbers.

Other pipe covering and block insulation by Ehret Magnesia Manufacturing Co. (3)

Thermasil · Thermalite 85% Magnesia · Durocell

Pipe covering and block insulation by other makers (273)

Thermobestos · Superex (Johns-Manville) · Careytemp (Philip Carey) · Kaylo (Owens-Corning) · Unibestos (Union Asbestos & Rubber Co.) · Detrick (Combustion Engineering) · Dri-mag (Crown Cork & Seal) · Dual Careytemp (Philip Carey) · Duplex (Armstrong Cork) · Duplex (Keasbey & Mattison) · Durant (Keene/Ehret) · Durestos (maker not given) · Enduro (Keene) · Enduro Block (Baldwin-Ehret-Hill) · Epitherm 1200 (Eagle-Picher) · Equality (Johns-Manville) · Eureka Covering (Johns-Manville) · Excel (Philip Carey) · Express Covering (Johns-Manville) · Featherweight (Keasbey & Mattison) · and 253 more: all pipe covering and block insulation

See also

References

  1. Asbestos Magazine, 1935, March 1935 (March 1, 1935), p. 43.
  2. Asbestos; Publication of Identifying Information (February 13, 1990), p. 11.
  3. Asbestos Magazine, 1938, June 1938 (June 1, 1938), p. 2.
  4. Military Qualified Products List (1951–1995) (February 25, 1959), p. 55.
  5. 85% Magnesia Insulation Manual, Second Edition (January 1, 1956), p. 70.
  6. Sourcebook on Asbestos Diseases: Medical, Legal, and Engineering Aspects, Volume Two (1986), p. 74. Not yet published in our library.

Mentioned on this site

Cite this page

“Enduro (Ehret Magnesia Manufacturing Co.).” AsbestosClaims.Law Library. https://asbestosclaims.law/library/products/ehret-magnesia-manufacturing-co-enduro.

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This page is provided for general informational purposes and does not constitute legal advice. Every asbestos case turns on its own facts, exposure history, diagnosis, deadlines, available evidence, and applicable law. Reviewing this page does not create an attorney-client relationship. For advice about your specific situation, call 833-4-ASBESTOS for a free case review.