Proco Expansion Joint Products for Various Applications

WEATHERCAP® protects sealant from environmental exposure, reduces the effective joint opening size, and flexibly adapts to building movement. This prolongs sealant life, prevents margin checking, resists corrosion and mold, and provides a more durable, long-lasting weather-resistant seal than sealant by itself.

Type A is a flat-cap configuration designed for masonry units set in the same plane, such as cross joints on copings, lintels, and cornices. Type B is a 90-degree cove-cap configuration used for right-angle joints, such as where a horizontal masonry surface meets a vertical wall or parapet.

Yes, the WEATHERCAP® system is suitable for both new construction and historic restoration. Certain products, like the A-2 Type A cap, are specifically designated for new construction installations. The system provides long-term joint protection from the outset, preventing future issues related to building settlement and movement.

Absolutely. It is a premier solution for historic preservation and is specified in the U.S. General Services Administration's Historic Preservation Technical Procedures. Its flexibility and ability to blend with masonry make it ideal for protecting the vulnerable joints of landmark structures without compromising their aesthetic integrity.

The soft lead construction has a low elastic modulus, allowing it to remain flexible and 'creep' into new joint configurations as a building settles or moves. Unlike rigid materials that can crack or separate, WEATHERCAP® deforms with the structure, maintaining a continuous, protective seal over the joint sealant.

Yes, all WEATHERCAP® products can be painted to match the surrounding masonry or architectural details. If left unpainted, the soft lead surface naturally oxidizes to a neutral grey color that blends seamlessly with most stone and masonry, preserving the building's aesthetic appearance while providing superior protection.