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Laptite (Johns-Manville)

Laptite was a Johns-Manville asphaltic cement.1,2 In sworn answers in two lawsuits against Fibreboard and others, the Borel and Potter cases, J-M described it in 1969 and 1970 only as "an asphaltic cement," without naming its ingredients.1,2

A 1990 EPA notice that published what Manville reported lists Laptite in a group of asbestos bitumen cements, with Insulkote, Duplex and Asbestile, produced from 1952 to 1984.3 It describes the group as a black thick liquid, packaged in cans, pails or drums.3 For the group as a whole, not for Laptite alone, it gives 5 to 10% asbestos fiber, with up to 30% asphaltic emulsion, 20% limestone, 3% clay, 45% asphalt and 35% mineral spirits.3

An insurance company's 1981 list of asbestos products, compiled from other companies' answers in lawsuits, lists Laptite as a cement made by Johns-Manville from 1952 to 1981, the year of the list itself.4

Related: Asbestile.

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Asbestos claims

If you or a family member worked with or around Laptite (Johns-Manville) and later developed mesothelioma or another asbestos disease, a claim may be paid by the Manville Personal Injury Settlement Trust. Free case review.

What each document says

Every statement about Laptite (Johns-Manville) in the documents, in each document's own words.

The Borel v. Fibreboard Case File (1969-1972), Answers to interrogatories with exhibits

  • Description: “LAPTITE. (Cement) An asphaltic cement.”, p. 251

The Potter v. Fibreboard Case File (1969-1972), Answers to plaintiff's interrogatories with exhibits

  • Description: “(Cement) An asphaltic cement”, p. 252

Asbestos; Publication of Identifying Information (1990)

  • Made from: “produced 1952 to 1984”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Made until: “produced 1952 to 1984”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Ingredient: “asphaltic emulsion, 0 to 30%; limestone, 0 to 20%; clay, 0 to 3%, asphalt, 0 to 45%; mineral spirits, 0 to 35%”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Asbestos content: “asbestos fiber, 5 to 10%”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143
  • Description: “black thick liquid, packaged in cans, pails, or drums”, said by Manville Corporation, as recorded by U.S. EPA, Federal Register 55 FR (Feb. 13, 1990), p. 143

The Travelers Insurance Company's Product Information Booklet for Its Asbestos Seminar (1980–1981)

  • Made from: “52”, p. 64
  • Form: “CEMENT”, p. 64
  • Made until: “81”, p. 64

Manville Fund's Answers to Interrogatories in Gunn v. Celotex (1989)

  • Made from: “Date Manufactured: 1938”, p. 1145
  • Use: “Used for sealing the laps of weatherproof insulating jackets”, p. 825
  • Made at: “Manville Plant, Manville, New Jersey (1913 through 1985): Laptite Cement” (at Manville) (the plant: Manville, New Jersey), p. 635
  • Form: “Cement”, p. 1145
  • Made until: “Date Discontinued: 1954”, p. 1145
  • Description: “A heavy brushing fibrated cut-back asphaltic cement”, p. 825
  • Temperature limit: “with a temperature limit of 140 degrees F”, p. 825
  • Asbestos content: “asbestos containing”, p. 635
  • Asbestos content: “10.0 - 16.9 % fiber by weight”, p. 1145
  • Asbestos fiber: “Chrysotile”, p. 1145
  • Warning label: “Date Labeled: None”, p. 1145

Johns-Manville Material Safety Data Sheet for LAPTITE Cement (1981)

  • Ingredient: “Asphalt 55”, p. -136
  • Asbestos content: “10”, p. -136
  • Ingredient: “Mineral Spirits (SOLVENTS line) 35”, p. -136

Manville Fund's Responses to Plaintiffs' Interrogatories in Moore v. H.K. Porter (1990)

  • Asbestos content: “asbestos containing”, p. 227
  • Made at: “Waukegan Plant (1922 to 1985): Laptite Cement” (at Waukegan) (the plant: Waukegan, Illinois), p. 277
  • Made at: “Marrero Plant (1947 to 1980s): Laptite Cement” (at Marrero) (the plant: Marrero, Louisiana), p. 247
  • Made at: “Manville Plant (1913 to 1985): Laptite Cement” (at Manville) (the plant: Manville, New Jersey), p. 227
  • Made at: “Pittsburgh Plant (1926 to 1980s): Laptite Cement” (at Pittsburgh) (the plant: Pittsburg, California), p. 257

Kind of product

We list Laptite (Johns-Manville) with insulating cement and coatings, from how the documents describe its form. That page explains how such products exposed workers.

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

Other insulating cement and coatings by Johns-Manville (51)

Thermobestos · Superex · Asbestile · 85 Magnesia · 302 · Fil-insul · Fireite · Firetite Furnace Cement · Heat Treating Cement · Insulkote ET · Insulkote ST · Johns-Manville Jm · Laptite Cement · Mx-3808 Asb Filler · Mx-3808 Asbestos Filler · Navy 450 Cement · No. 302 Insulation Cement · Superex Cement · Superex Cement for Navy · Superex-m · and 31 more on the company's page

Insulating cement and coatings by other makers (273)

Prasco (Fibreboard) · Calsilite (GAF) · Caltemp (Fibreboard) · Sal-mo (Nicolet) · Super 66 (Eagle-Picher) · Insulseal (Eagle-Picher) · Insulstic (Eagle-Picher) · K & M (Nicolet) · Kaiser (Combustion Engineering) · Karnak 200 (Karnak Chemical) · Karnak 925 (Karnak Chemical) · Kaytherm (Nicolet) · Laykold Mastic (American Bitumuls) · LF 20 (Philip Carey) · Limpet (Atlas Turner) · Magnesia Cement (Mundet Cork) · Mastic (Owens-Corning) · Mastic Undercoat (American Bitumuls) · Mhd (Combustion Engineering) · Mineral Wool Insulating Cement (Mundet Cork) · and 253 more: all insulating cement and coatings

See also

References

  1. The Borel v. Fibreboard Case File (1969-1972), Answers to interrogatories with exhibits (March 27, 1970), p. 25.
  2. The Potter v. Fibreboard Case File (1969-1972), Answers to plaintiff's interrogatories with exhibits (December 29, 1969), p. 25.
  3. Asbestos; Publication of Identifying Information (February 13, 1990), p. 14.
  4. The Travelers Insurance Company's Product Information Booklet for Its Asbestos Seminar (1980–1981) (April 30, 1981), p. 6.
  5. Manville Fund's Answers to Interrogatories in Gunn v. Celotex (December 7, 1989), p. 114.
  6. Johns-Manville Material Safety Data Sheet for LAPTITE Cement (June 5, 1981), p. -13.
  7. Manville Fund's Responses to Plaintiffs' Interrogatories in Moore v. H.K. Porter (February 15, 1990), p. 22.

Mentioned on this site

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“Laptite (Johns-Manville).” AsbestosClaims.Law Library. https://asbestosclaims.law/library/products/johns-manville-laptite.

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