ASTM C793-05(2017) PDF

Scope: 5.1 It is known that solar radiation contributes to the degradation of sealants in exterior building joints. The use of a laboratory accelerated weathering machine with actinic radiation, moisture and heat appears to be a feasible means to give indications of early degradation by the appearance of sealant cracking. However, simulated weather factors in combination with extension may produce more severe degradation than weather factors only. Therefore, the effect of the weathering test is made more sensitive by the addition of the bending of the specimen at cold temperature.

1.1 This test method covers a laboratory procedure for determining the effects of accelerated weathering on cured-in-place elastomeric joint sealants (single- and multicomponent) for use in building construction.

1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.

1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other ASTM committees or other organizations.

1.4 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.

ASTM C793-05(2017) Referenced Document

ASTM C1442 Standard Practice for Conducting Tests on Sealants Using Artificial Weathering Apparatus
ASTM C717 Standard Terminology of Building Seals and Sealants
ASTM G151 Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources

2023 ASTM C793-23 Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants
2005 ASTM C793-05(2017) Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants
2005 ASTM C793-05(2010) Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants
2005 ASTM C793-05 Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants
2004 ASTM C793-04 Standard Test Method for Effects of Accelerated Weathering on Elastomeric Joint Sealants
2002 ASTM C793-02 Standard Test Method for Effects of Accelerated Weathering on Elastomeric Joint Sealants
1991 ASTM C793-91(1997)e1 Standard Test Method for Effects of Accelerated Weathering on Elastomeric Joint Sealants