Astm C920 |link| Jun 2026
When you look at a technical data sheet (TDS) for an , you will see a string of letters and numbers (e.g., Type S, Grade NS, Class 25, Use T ). These identifiers represent specific performance tiers.
Understanding ASTM C920: The Standard for Elastomeric Joint Sealants astm c920
A common mistake in construction is specifying a product by brand name alone (e.g., "Use Dow 795 or equal"). When you look at a technical data sheet