Astmc920 Jun 2026

To meet the ASTM C920 standard, a sealant must undergo rigorous testing in a laboratory setting. The key performance criteria include:

ASTM C920 is a standard specification for elastomeric joint sealants, published by ASTM International (formerly known as the American Society for Testing and Materials). The standard provides detailed requirements for the properties, testing, and application of elastomeric sealants used to fill joints and gaps in building construction, particularly in concrete, masonry, and other substrates. astmc920

The "Type" designates the chemical makeup of the sealant. To meet the ASTM C920 standard, a sealant

It is important to note what ASTM C920 does cover: it does not apply to sealants intended for use in fuel tanks, swimming pools (unless specifically meeting water-immersion criteria), or hot-poured sealants (which are covered by other standards like ASTM D1190). The "Type" designates the chemical makeup of the sealant

ASTM C920 is a critical standard for ensuring the performance and durability of elastomeric joint sealants in building construction. By specifying and testing sealants according to this standard, architects, engineers, contractors, and building owners can ensure that joints and gaps are properly sealed, protecting the building and its occupants from the elements.