Association of the Wall and Ceiling Industry Logo

New ASTM International Standard Supports Testing for Sealant Cracking

A new ASTM International standard outlines a way to quantitatively detersmine the extent and causes of cracking in a building sealant. The new standard, soon to be published as C1851, was developed by ASTM International’s committee on building seals and sealants (C24).

    

“When you see a weathered sealant, it is usually cracked, crazed or crumbled,” says ASTM International member Chris White, a research chemist at the U.S. National Institute of Standards and Technology. “Suppose you wanted to know how much change in the properties is due to chemical change and how much is due to cracking. Now you can with this new standard.”

    

According to White, the standard stemmed from the idea that sealant cracks contribute to tensile modulus (stiffness) change but not to compression. After measuring both using a standard for measuring time-dependent modulus of sealants (C1735), it is then possible to use the new standard to see how much of the change is due to chemical changes in the sealant and how much is physical cracking.

    

Manufacturers could use the new standard to determine and ultimately enhance durability. Testing laboratories and regulatory bodies could also find it useful.

Browse Similar Articles

You May Also Like

The U.S. Department of Labor announced a final rule clarifying the rights of employees to authorize a representative to accompany an Occupational Safety and Health Administration compliance officer during an inspection of
New research has ranked the United States’ most populated industries and estimated what their pay could look like in 2033, in line with inflation, and the results are surprising.
AWCI's Construction Dimensions cover

Renew or Subscribe Today!