Test method determines chemical compatibility of sealants and flashings

October 07, 2008
By Administrator
Oct. 7, 2008 - The American Architectural Manufacturers Association (AAMA) has released a voluntary test method for sealants and flashings. The test method outlined in the eight-page document, titled “Voluntary Test Method to Determine Chemical Compatibility of Sealants and Self-Adhered Flexible Flashings,” is intended to help determine the chemical compatibility of liquid applied sealants and self-adhered flashings that may come in contact during the installation of fenestration products.

The test method describes a laboratory screening procedure for evaluating the chemical compatibility of self-adhered flashing and sealant materials intended for use in construction and fenestration installations that are properly installed.

“This test is intended for flexible sheet membrane materials that include an integral adhesive layer, which are generally installed as concealed flashings behind claddings on exterior walls,” says Ken Brenden, AAMA technical standards manager. “However, this method can also be applied to other interfaces in the building envelope,” he adds.

Adhesive compatibility or overall performance and integrity of the weatherseal at the sealant and self-adhered flashing interface are not addressed by this method.

The AAMA says sealant performance should be tested in accordance with AAMA 800-07, Voluntary Specifications and Test Methods for Sealants, and self-adhered flashing performance should be tested in accordance with AAMA 711-07, Voluntary Specification for Self Adhering Flashing Used for Installation of Exterior Wall Fenestration Products.

The test method comes as the AAMA begins a 12-month review to evaluate AAMA 520,  the Voluntary Specification for Rating the Severe Wind-Driven Rain Resistance of Windows, Doors and Unit Skylights. The final document is expected to be published next summer.

To learn more about the AAMA visit www.aamanet.org .

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