Curtain wall system sealing: In glass curtain walls, stone curtain walls, and similar structures, rubber rings accommodate thermal expansion and contraction caused by temperature changes, maintaining long-term sealing stability and preventing moisture ingress.

HVAC systems: At ventilation duct and air conditioning pipe connections, rubber rings prevent leakage of hot or cold air, improving energy efficiency while providing vibration damping and noise reduction.

Pipe connection sealing: In building water supply & drainage and fire protection piping systems, rubber rings (such as O-rings and gaskets) are used for fitting interfaces, offering easy installation, pressure resistance, durability, and effective leak prevention.