MatWeb - Material Property Data Advertise with MatWeb!     Register Now
Data sheets for over 155,000 metals, plastics, ceramics, and composites.
MatWeb - Material Property Data HOME  •   SEARCH  •   TOOLS  •   SUPPLIERS  •   FOLDERS  •   ABOUT US  •   FAQ  •   LOG IN    
Recently Viewed Materials (most recent at top)  

Login to see your most recently viewed materials here.

Or if you don't have an account with us yet, then click here to register.

  Searches:   Advanced  | Category  | Property  | Metals  | Trade Name  | Manufacturer  | Recently Viewed Materials
Amatrium Materials AI
Thermal Ceramics FireMaster Door Seal+
Categories: Ceramic

Material Notes: FireMaster Door Seal+ is an intumescent material produced from a unique blend of high-purity, high temperature fibers, special additives, and binders in a special process. At maximum expansion which occurs at approximately 1200°F (649°C), the FireMaster Door Seal+ expands up to 800% of its thickness. This results in the FireMaster Door Seal+ being an excellent candidate for high-temperature gaskets and seals.

Like all the other high-quality FireMaster products, FireMaster Door Seal+ is noted for its excellent flexibility, outstanding handling characteristics, and high-insulating value.


  • 2000°F (1093°C) capability
  • Lightweight, flexible, simple to cut and install
  • Expands 8 times its thickness
  • UL CLBV R17035
  • Withstands ASTM E 119, IMO A.754 and , UL-1709
  • Low biopersistent composition
  • Applications:

  • Fire doors
  • Expansion joints
  • Marine bulkhead and decks
  • Military bulkhead and decks
  • Offshore
  • Platform bulkhead and decks
  • Gaskets and seals
  • OEM manufactured systems

    Information provided by Thermal Ceramics

    Data has not been recently verified. Please contact manufacturer for current information.

  • Vendors:
    Available Properties
    • Density
    • Maximum Service Temperature, Air
    • Maximum Service Temperature, Air
    Property Data

    This page displays only the text
    of a material data sheet.

    To see MatWeb's complete data
    sheet for this material (including
    material property data, metal
    compositions, material suppliers,
    ), please click the button below.

    Manufacturer Notes:

    Category Notes

    Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.


    Free Trade Publications, Click Here!
    Free Trade Publications, Click Here!
    Please read our License Agreement regarding materials data and our Privacy Policy. Questions or comments about MatWeb? Please contact us at We appreciate your input.

    The contents of this web site, the MatWeb logo, and "MatWeb" are Copyright 1996-2022 by MatWeb, LLC. MatWeb is intended for personal, non-commercial use. The contents, results, and technical data from this site may not be reproduced either electronically, photographically or substantively without permission from MatWeb, LLC.