ASTM C834-17 PDF Download

The ASTM C834-17 standard provides requirements for one-component latex sealants used for sealing joints in building construction. The standard defines five types and grades of sealants: Type OP, Type C, Grade 18°C, Grade 0°C, and Grade NF. These sealants are composed of latex with appropriate fillers, pigments, and chemical additives.

The physical properties of the sealants must conform to specified requirements based on type and grade. To ensure compliance, various tests are conducted, including extrudability after aging, artificial weathering, volume shrinkage, low-temperature flexibility, extension-recovery and adhesion, slump, staining, and tack-free time.

The standard emphasizes that not all sealants meeting the specification are suitable for all applications and substrates. Therefore, it is crucial to specify the appropriate type and grade for a particular sealant. Test methods described in the standard focus on standard substrates such as glass, wood, and aluminum. However, if tests with additional or different substrates are required, they should be specified separately.

The standard includes a reference to Guide C1193 for proper use of sealants that comply with this specification. It also notes that there is currently no ISO standard equivalent to ASTM C834-17.