Standard Test Method for Determining the Outgassing Potential of Sealant Backing

Importancia y uso:

5.1 This test method is an indicator of a potential sealing problem that could occur if a sealant backing is flawed in manufacture or transportation to the job site, or abused during the installation. If flawed, some sealant backing materials, in combination with certain environmental conditions, can outgas, generating voids in the applied sealant before the sealant cures, thereby potentially compromising the cured sealant's intended performance.

5.2 Voids are also known to be caused by other means and under certain conditions such as air entrapment during sealant application, trapped air in the substrate releasing into the uncured sealant, incompatibility of the sealant with the sealant backing or substrate, or inhospitable installation conditions in the field. This test method is limited to identifying the outgassing potential of a punctured sealant backing by formation of a void in the soft uncured sealant under conditions of heat and compression.

Subcomité:

C24.20

Referida por:

C1193-16R23, C1330-23, D5249-10R21, C1401-23

Volúmen:

04.07

Número ICS:

91.100.50 (Binders. Sealing materials)

Palabras clave:

outgassing; sealant backing;