ASTM C1589 / C1589M - 13

    Standard Practice for Outdoor Weathering of Construction Seals and Sealants

    Active Standard ASTM C1589 / C1589M | Developed by Subcommittee: C24.40

    Book of Standards Volume: 04.07


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    ASTM C1589 / C1589M

    Significance and Use

    4.1 Tests conducted in accordance with this practice are used to evaluate the weatherability of construction seals and sealant materials when they are exposed to outdoor weather conditions. The weatherability of seals and sealants in actual outdoor use can be very different depending on the location, because of differences in solar radiation, moisture, temperature, pollutants, and other factors. Sealant color may also affect weatherability.

    4.2 The type, frequency and amount of movement of sealants varies with location and may affect weatherability. It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining weatherability in a different location. Exposures in several locations with different climates (for example, solar radiation, moisture, temperature, pollutants, biological and other factors) that represent a broad range of anticipated service conditions are recommended.

    4.3 It is strongly recommended that control materials of similar composition and construction to the test specimens and with known weatherability be exposed along with the test specimens for the purpose of comparing the performance of test materials to the controls. It is preferable to use two control materials, one with relatively good weatherability and one with relatively poor weatherability.

    4.4 The results of short-term exposure tests can provide an indication of relative outdoor performance, but they shall not be used to predict the absolute long-term performance of a seal or sealant material. The results of tests conducted for less than 12 months will depend on the particular season of the year in which they begin.

    4.5 Because of year-to-year climatatological variations, results from a single exposure test cannot be used to predict the absolute rate at which a seal or sealant degrades. Several years of repeat exposures are needed to determine an average test result for a given location.

    4.6 Climatic and construction factors can impose cyclic movement upon sealed joints in use. This movement can impact the effects of outdoor weathering and often causes types of failure that are not produced by weathering without movement. Thus, the ability of building joint sealants to withstand temperature-induced movements of compression and expansion is an important property.

    4.7 Outdoor weathering of specimens in combination with natural or forced cyclic movement during exposure can provide a more realistic assessment of the ability of a seal or sealant to withstand the combined effects of climate and movement encountered by seals and sealants in building construction applications.

    1. Scope

    1.1 This practice describes outdoor exposure procedures to be used as part of a test designed to determine the weatherability of building construction, seals and sealants.

    Note 1See Practice G24 for Exposures to Daylight Filtered Through Glass.

    1.2 This practice includes three procedures for outdoor weathering. Procedure A exposes specimens to outdoor weathering without movement. Procedure B and Procedure C are, respectively, continuous natural and periodic manual techniques for subjecting specimens to the combination of cyclic movement and exposure to outdoor weathering.

    1.3 This practice is limited to the method by which the construction seals or sealants are exposed to outdoor weathering as part of a test program. It refers to the types of evaluations to be performed following the outdoor exposure but does not describe the test methods.

    1.4 Means of evaluation of the effects of weathering will depend on the intended use of the test material.

    1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the 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

    C717 Terminology of Building Seals and Sealants

    C718 Test Method for Ultraviolet (UV)-Cold Box Exposure of One-Part, Elastomeric, Solvent-Release Type Sealants

    C719 Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)

    C1135 Test Method for Determining Tensile Adhesion Properties of Structural Sealants

    C1257 Test Method for Accelerated Weathering of Solvent-Release-Type Sealants

    C1442 Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus

    C1735 Test Method for Measuring the Time Dependent Modulus of Sealants Using Stress Relaxation

    E631 Terminology of Building Constructions

    E732 Specification for Disposable Pasteur-Type Pipet

    E734 Specification for Disposable Glass Blood Sample Capillary Tube (Microhematocrit)

    E772 Terminology of Solar Energy Conversion

    G7 Practice for Atmospheric Environmental Exposure Testing of Nonmetallic Materials

    G24 Practice for Conducting Exposures to Daylight Filtered Through Glass

    G84 Practice for Measurement of Time-of-Wetness on Surfaces Exposed to Wetting Conditions as in Atmospheric Corrosion Testing

    G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials

    G147 Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests

    G169 Guide for Application of Basic Statistical Methods to Weathering Tests

    G178 Practice for Determining the Activation Spectrum of a Material (Wavelength Sensitivity to an Exposure Source) Using the Sharp Cut-On Filter or Spectrographic Technique


    ICS Code

    ICS Number Code 91.100.50 (Binders. Sealing materials)

    UNSPSC Code

    UNSPSC Code 31200000(Adhesives and sealants)


    DOI: 10.1520/C1589_C1589M

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