ASTM E2785 - 14

    Standard Test Method for Exposure of Firestop Materials to Severe Environmental Conditions

    Active Standard ASTM E2785 | Developed by Subcommittee: E06.21

    Book of Standards Volume: 04.12


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    Significance and Use

    5.1 This test method is intended to evaluate the material performance after exposure to a standardized set of severe environmental conditions. It is understood that these performance values are dependent upon these standardized exposure periods and environmental concentrations. Other values are possible if the exposure period or severe environmental concentration, or both, is changed.

    5.2 This test method is intended to be used where the material is exposed to the specific extreme environmental condition in its intended field of application.

    5.3 The user shall establish which properties are relevant to the application at hand, in order to determine the properties to be tested.

    Note 2It is not intended for all properties to be tested in all cases.

    5.4 This test method is intended to evaluate only the following types of materials, as defined by their physical properties or chemical properties, or both, and used in penetration firestops:

    5.4.1 Endothermic,

    5.4.2 Intumescent,

    5.4.3 Insulative,

    5.4.4 Ablative, and

    5.4.5 Subliming.

    5.5 This test method determines initial physical properties, chemical properties, or both, to allow comparison with physical properties, chemical properties, or both after exposure. The following properties are to be considered, as applicable:

    5.5.1 Weight loss or gain,

    5.5.2 Volume expansion,

    5.5.3 Thermal conductivity,

    5.5.4 Thermogravimetric analysis (TGA),

    5.5.5 Differential scanning calorimetry (DSC),

    5.5.6 Tensile strength and elongation,

    5.5.7 Visual observations, and

    5.5.8 Loss on ignition.

    5.6 This test method uses the following exposures:

    5.6.1 Elevated temperature,

    5.6.2 High humidity,

    5.6.3 Carbon dioxide and sulfur dioxide with moisture present,

    5.6.4 Water immersion,

    5.6.5 Temperature cycling,

    5.6.6 Wet-freeze-dry cycling, and

    5.6.7 Weathering.

    5.7 This test method does not provide any information regarding the actual fire performance of the firestop before or after the exposure tests.

    5.8 This test method will provide a comparison between formula and processing changes in materials.

    5.9 This test method only provides for a comparison of the tested material before and after a standardized exposure process.

    5.10 This test method shall be used as one element in evaluating materials or selecting firestop material(s) for a specific application. Other factors shall be considered, such as its fire performance as tested in accordance with Test Methods E814 or E119, flame spread as tested in accordance with Test Method E84, durability, and its compatibility with its adjacent materials.

    1. Scope

    1.1 This test method evaluates a change in physical properties, chemical properties, or both, of firestop materials after a standardized environmental exposure. This test method does not evaluate the fire performance of the firestop materials.

    1.2 This test method establishes indicators that will aid in determining the use of the tested material in buildings.

    1.3 This test method evaluates the properties of component products used within a firestop system, and does not evaluate the properties of assembled firestop systems.

    Note 1This test method does not preclude the possibility of exposing complete firestop systems to one or more severe environmental exposures and then exposing the complete firestop system to a fire test.

    1.4 This test method is intended to be a screening method in the evaluation of the relative behavior of a specific material before and after a standardized set of severe exposure criteria. Individual tests are not intended to be the only determining factor in evaluating or selecting a firestop material because each test has limitations.

    1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus

    C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus

    D412 Test Methods for Vulcanized Rubber and Thermoplastic Elastomers--Tension

    D870 Practice for Testing Water Resistance of Coatings Using Water Immersion

    D2041 Test Method for Theoretical Maximum Specific Gravity and Density of Bituminous Paving Mixtures

    D3045 Practice for Heat Aging of Plastics Without Load

    D3850 Test Method for Rapid Thermal Degradation of Solid Electrical Insulating Materials By Thermogravimetric Method (TGA)

    D4434 Specification for Poly(Vinyl Chloride) Sheet Roofing

    D4637 Specification for EPDM Sheet Used In Single-Ply Roof Membrane

    D4714 Test Method for Determination of Effect of Moist Heat (50 % Relative Humidity and 90C) on Properties of Paper and Board

    D5510 Practice for Heat Aging of Oxidatively Degradable Plastics

    D5893 Specification for Cold Applied, Single Component, Chemically Curing Silicone Joint Sealant for Portland Cement Concrete Pavements

    D6083 Specification for Liquid Applied Acrylic Coating Used in Roofing

    D6754 Specification for Ketone Ethylene Ester Based Sheet Roofing

    D6878 Specification for Thermoplastic Polyolefin Based Sheet Roofing

    D6947 Specification for Liquid Applied Moisture Cured Polyurethane Coating Used in Spray Polyurethane Foam Roofing System

    E84 Test Method for Surface Burning Characteristics of Building Materials

    E119 Test Methods for Fire Tests of Building Construction and Materials

    E145 Specification for Gravity-Convection and Forced-Ventilation Ovens

    E176 Terminology of Fire Standards

    E473 Terminology Relating to Thermal Analysis and Rheology

    E631 Terminology of Building Constructions

    E814 Test Method for Fire Tests of Penetration Firestop Systems

    F495 Test Method for Weight Loss of Gasket Materials Upon Exposure to Elevated Temperatures

    G151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources

    G155 Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials


    ICS Code

    ICS Number Code 13.220.10 (Fire-fighting); 13.220.40 (Ignitability and burning behaviour of materials and products)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/E2785

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