
WEATHERCAP Joint Protective System (Lead Stone Flashing / Tee Caps)
- Soft lead flexes with building movement
- Oxidizes to neutral grey blending with masonry
- Extends sealant life by reducing joint exposure
GSA Historic Preservation Specified
U.S. Patent 6991400
Flashing strips from WEATHERCAP protect masonry joints with a patented soft lead system that flexes with building movement, shields sealants from weather, and prevents moisture penetration in horizontal and vertical joints across new construction and historic restoration projects.


For masonry joints subject to building movement, soft lead flashing strips like WEATHERCAP outperform adhesive flashing tapes because they permanently flex without tearing, resist corrosion and mold, and can be painted to blend with masonry. Unlike adhesive tapes that degrade under UV and thermal cycling, lead strips maintain elasticity for decades in exposed exterior joints.
Talk to our experts for custom solutions and tailored guidance.

Protects mortar joints on landmark stone facades during restoration while meeting GSA preservation compliance standards.

Installed in new masonry joints to protect sealants from environmental stress and extend building envelope durability.

Used on federal buildings, capitols, and courthouses requiring durable, code-compliant joint protection systems.

Protects masonry joints on academic buildings, preserving architectural integrity of campus landmark structures.
Talk to our experts for custom solutions and tailored guidance.
Trusted on the Washington Monument, U.S. Supreme Court, and 28+ nationally significant landmarks across the United States.
U.S. Patent 6991400 protects a soft lead strip design that flexes permanently without cracking or losing seal integrity.
Specified in GSA Historic Preservation Technical Procedures, ensuring compliance for federal and institutional restoration projects.
Submit your project details and our team will respond with product specifications, sizing guidance, and shipping timelines within 48 hours.
For immediate assistance, feel free to give us a direct call at (985) 649-4000.
For immediate assistance, feel free to give us a direct call at (985) 649-4000.