What type of sealant is known for its flexibility and ability to maintain a seal during movement?

Elastomeric sealants are specifically designed to remain flexible even after curing, which makes them particularly effective in applications where movement or expansion and contraction might occur. This flexibility allows them to accommodate structural shifts, thermal changes, and vibrations without losing their sealing properties. As a result, elastomeric sealants are ideal for use in environments that experience dynamic conditions, such as building expansion joints or areas subject to frequent movement.

While dynamic sealants technically also serve a similar purpose, they may not have the same broad applicability or flexibility as elastomeric sealants. Static sealants, on the other hand, are designed for applications where there is little to no movement; therefore, they may not maintain a seal effectively under conditions of movement. Rigid sealants are least suitable for situations involving movement, as their hardened nature does not allow for flexibility, making them vulnerable to cracking and seal failure under movement. Thus, elastomeric sealant stands out as the most reliable choice for maintaining a seal during movement.