A flexible material that seals gaps and joints to prevent air and water infiltration while accommodating building movement.

Weather Seal is a flexible material that seals gaps and joints to prevent air and water infiltration while accommodating building movement through elastomeric compounds, gaskets, or strips that create weatherproof barriers at building connections and openings while maintaining flexibility for thermal expansion and structural movement. This essential building envelope component consists of various sealing materials including caulks, sealants, weatherstripping, and gaskets that are applied to joints, penetrations, and interfaces to prevent weather infiltration while allowing for building movement and maintenance access. Weather seals are critical in building construction where they provide the final line of defense against air and water infiltration, enhance energy efficiency, maintain occupant comfort, and preserve building integrity, making them indispensable for windows, doors, joints, penetrations, and any building interface where weather sealing is necessary for building performance and durability.

Weather seals are utilized in various building applications and sealing requirements including window and door installations where they prevent air and water infiltration around frames and operating components, building joints where they accommodate movement while maintaining weather protection, penetrations where they seal around pipes, conduits, and other building services, curtain wall systems where they provide weather sealing between panels and components, roofing systems where they seal joints, penetrations, and transitions, and specialty applications including expansion joints, equipment installations, and architectural details where flexible weather sealing is required for building performance. Each application requires appropriate seal selection, installation methods, and maintenance procedures based on movement requirements, exposure conditions, and performance needs.

The types and materials of weather seals include structural glazing sealants that provide weather sealing and structural support for glazing systems, weatherstrip materials including foam, rubber, and brush seals that provide sealing for operable components, caulk and sealant compounds including silicone, polyurethane, and acrylic formulations for various sealing applications, gasket systems including compression and structural gaskets for curtain walls and glazing, tape sealants including butyl and acrylic tapes for temporary and permanent sealing, and specialty seals including fire-rated, structural, and high-performance seals for specific applications. Material selection depends on movement requirements, environmental exposure, and performance specifications.

Fun Fact: The first synthetic weather seals were developed in the 1940s using silicone technology, and modern high-performance weather seals can accommodate joint movement of ±50% while maintaining weatherproof integrity for over 20 years.

• Compression Seal
• Quality Seal
• Weather Barrier