SpecTips: Carlisle’s LIQUISEAL Liquid Flashing – A Solution to Difficult Rooftop Detailing and Tie-Ins

Effective, long-lasting flashing details are one of the most critical aspects of ensuring the performance of a roof system. However, oddly shaped penetrations like I-beams, tight clearances, cluster penetrations, and flashing terminations where physical clamps cannot be used have long caused challenges for architects, designers, and contractors. It can be difficult for applicators to effectively use traditional membrane and flashing materials to ensure a watertight system that seals around these types of penetrations. When traditional membrane and flashing materials are used, stress can be imposed onto the product, which can lead to potential reductions in performance and service life.

Another common rooftop challenge for architects is tie-ins between dissimilar roofing systems. This is especially prevalent on projects where an addition is being added to an existing building and when multiple membrane systems are used.

Carlisle's LIQUISEAL® Liquid Flashing is a two-component, polyurethane-based, reinforced flashing system ideal for oddly shaped penetrations and tie-ins between dissimilar roofing systems. With proper preparation, LIQUISEAL will bond to metal, concrete, and masonry, as well as all Carlisle single-ply membranes including EPDM, TPO, PVC, and KEE HP. It comes in light gray and white to meet the desired aesthetics for most projects.

The LIQUISEAL flashing system utilizes reinforcement fabric laid into the liquid resin to ensure performance even when exposed to building movement. LIQUISEAL eliminates the need to build a knee wall when tying into a dissimilar roof system because it lets applicators tie the two systems together on a horizontal plane, eliminating the potential for impeding drainage. LIQUISEAL offers specifiers another tool to meet their design needs and ensure optimum performance and warranty compliance of their Carlisle roof system.

TIPS
- LIQUISEAL Liquid Flashing should be included in Division 7 Thermal and Moisture Protection roofing membrane sections (EPDM, PVC, TPO) of 3-part CSI specifications. When specifying detailing of penetrations, make sure the project's spec calls for LIQUISEAL Liquid Flashing for oddly shaped penetrations, existing roof tie-ins, or transitions for dissimilar roofing materials.

- Refer to Carlisle details to determine proper application.

Check out the resources below for more information.
LIQUISEAL Product Data Sheet
LIQUISEAL Details
LIQUISEAL Installation Videos