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    30 Year Outdoor Weathering Study of Construction Sealants

    Published: 07 November 2014

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    Long-term weather resistance is an important factor to consider when selecting a sealant product for use as an exterior weatherseal for construction applications. The weathering performance of sealants used in these applications can be dependent upon: sealant type, sealant chemistry, product formulation, building location, climate, and joint orientation among other factors. This paper compares and shows the long-term performance of three construction sealant types: silicone, polyurethane, and acrylic terpolymer. Performance attributes such as: toughness, flexibility, adhesion, and physical degradation (i.e., reversion, cracking, hardness, etc.) are compared after a 30 year exposure to outdoor weathering in South Florida.


    durability, outdoor weathering, silicone, polyurethane, acrylic terpolymer, hardness, flexibility, adhesion, elastic recovery, toughness

    Author Information:

    Bull, Errol D.
    Technical Manager, Momentive Performance Materials, Waterford, NY

    Lucas, Gary M.
    Principal Chemist, Sealants Technology, Momentive Performance Materials, Waterford, NY

    Committee/Subcommittee: C24.87

    DOI: 10.1520/STP158320140060