What movement class do you typically specify for curtain wall joints? Let us know below. 👇 #ASTMC920 #BuildingEnvelope #SealantSpecs #ConstructionQuality #FacadeEngineering #ElastomericSealant
Beyond the Tube: Why ASTM C920 is the Gold Standard for Elastic Joint Sealants
But not all sealants are created equal. If you are specifying or installing a joint sealant for a critical application (curtain wall, plaza deck, or window perimeter), one standard should be non-negotiable: .
When you see that designation, you know you have a product engineered for decades, not just the next rainstorm.
When a building moves, its skin must follow. From thermal expansion and wind sway to seismic drift and concrete shrinkage, modern structures are in constant motion. The thin line of defense against water intrusion, air leakage, and energy loss is the sealant .