ASTM C719-14 (R2019) PDF Download

ASTM C719-14 (R2019) is a standard test method that is used to evaluate the adhesion and cohesion of elastomeric joint sealants under cyclic movement, specifically using the Hockman cycle. This method is designed to simulate the performance of building sealants when subjected to water immersion, cyclic movement, and temperature change.

The purpose of this test method is to determine the ability of the sealant to maintain its adhesion and cohesion properties when exposed to these varying conditions. It is important to note that this test method only evaluates the performance of the sealant when installed correctly with recommended primers. It does not assess sealant failures caused by factors such as improper joint design, excessive joint movement, or improper application practices.

In the test procedure, the sealant is applied to a test specimen and subjected to a prescribed cyclic movement that simulates the movement of a building joint. The specimen is then immersed in water and subjected to temperature changes, simulating real-world conditions. The adhesion and cohesion of the sealant are evaluated by visually inspecting for any failures, such as cohesive failure within the sealant or adhesive failure between the sealant and the substrate.

By conducting this test, the performance of elastomeric joint sealants can be assessed, allowing for a better understanding of their suitability and durability in different construction applications.