Astm C920 _verified_ -

Using Grade P (Pourable) on a vertical wall will result in a mess and a wasted product, as the liquid will flow out before it cures. Conversely, using Grade NS (Non-Sag) in a horizontal traffic joint creates a bump in the road that can be tripped over or peeled away.

Sealants are critical components in a building's envelope, tasked with preventing air and water infiltration while accommodating movement between different building materials. ASTM C920 ensures that a product has undergone rigorous testing for specific characteristics, such as: astm c920

In the complex world of construction specifications, few documents are referenced as frequently—or as misunderstood—as . Whether you are sealing a high-rise curtain wall, a parking deck, or a bathroom expansion joint, this standard serves as the benchmark for quality. Using Grade P (Pourable) on a vertical wall

This defines the chemistry and curing mechanism. ASTM C920 ensures that a product has undergone

: High-performance sealants for joints subject to extreme expansion and contraction. 4. Use (Substrate Compatibility)