Astm C920 Standard Specification For Elastomeric Joint Sealants Summary Jun 2026

Pre-mixed and ready for immediate use. These are common for general field applications like windows and doors.

Requires mixing two or more parts before application. These often cure faster and are used for high-volume or specialized industrial projects. 2. Grade: Flow and Consistency Pre-mixed and ready for immediate use

Using a product that simply claims to be "high quality" isn't enough for structural integrity. Specifying a sealant that conforms to ensures the material has been independently verified to handle the specific mechanical and environmental stresses of the project. Failure to match the movement [Class] or application [Use] to the job's requirements is a leading cause of sealant warranty claims and water infiltration. C920 Standard Specification for Elastomeric Joint Sealants These often cure faster and are used for

The ASTM C920 standard specifies the following key requirements for elastomeric joint sealants: Specifying a sealant that conforms to ensures the

: Self-leveling; used for horizontal joints like floor slabs.

Measures how strongly the sealant bonds to specific substrates. Failure occurs if the sealant detaches from the surface.