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New Silicone Liquid Flashing Component Helps Air Barrier System Deliver A Complete Building Protection Solution

Dow Corning® 778 Silicone Liquid Flashing provides an easy-to-use weatherproof seal for challenging through-wall penetrations.


With the complexity of modern window and door penetrations and transitions – which include any variety of substrates, barriers and sheathing – builders are challenged to ensure a continuous, weathertight seal. To simplify installation and provide the assurance of 100% silicone performance, Dow Corning has added a new liquid flashing to the Dow Corning® Silicone Air Barrier System.

Featuring extended tooling time, primerless adhesion to cut sheathing edges, and rugged cured properties, Dow Corning® 778 Silicone Liquid Flashing is an ideal choice for sealing window, door and other challenging through-wall transitions. The new liquid flashing delivers performance superior to other flashing methods, mitigating the challenges associated with embedded mesh and folding of sheet flashings. Its primerless formulation both simplifies installation and saves time otherwise wasted waiting for primers to cure.

“The Dow Corning Silicone Air Barrier System was developed to bring trusted silicone solutions to common challenges in building construction,” said Dow Corning Americas Marketer Jim Stange. “With the addition of Dow Corning 778 Silicone Liquid Flashing, contractors have a complete, compatible silicone system that’s easy to apply and backed by Dow Corning support.”

“Additionally, Dow Corning 778 Silicone Liquid Flashing – like the other components of the Dow Corning Silicone Air Barrier System – can be used either as part of the system or as a stand-alone solution with other common building materials.”

The Dow Corning Silicone Air Barrier System features Dow Corning® DefendAir 200. Flexible, seamless and vapor-permeable, the 100% silicone liquid-applied air and water barrier is suitable for use on many wall substrates.

In addition to the new liquid flashing, a range of other high-performance 100% silicone components complements the barrier, including the Dow Corning® Silicone Transition System, pre-cured silicone rubber strips and corners for sealing window-to-wall and other building transitions; Dow Corning® 758 Silicone Weather Barrier Sealant, a primerless solution for the challenge of sealing plastic and polyolefin-based window flashing and building wraps; and Dow Corning® 791 Silicone Weatherproofing Sealant, a proven primerless performer that provides robust adhesion.

Learn more at AIA
The AIA Convention is one of the largest annual gatherings of architects and design professionals in the United States. Dow Corning industry experts will be showcasing the Dow Corning Silicone Air Barrier System – along with the latest in structural silicone solutions – at Booth 1751 of the AIA Expo in Atlanta from May 14-16.

Contact us for more information

Dow Corning High Performance Building Solutions include proven materials for structural and protective glazing, weatherproofing, insulating glass, window and door fabrication, and building materials protection.

To learn more about Dow Corning High Performance Building Solutions, visit

About Dow Corning
Dow Corning ( provides performance-enhancing solutions to serve the diverse needs of more than 25,000 customers worldwide.

A global leader in silicones, silicon-based technology and innovation, Dow Corning offers more than 7,000 products and services via the company’s Dow Corning® and XIAMETER® brands. Dow Corning is equally owned by The Dow Chemical Company and Corning, Incorporated. More than half of Dow Corning’s annual sales are outside the United States. Dow Corning’s global operations adhere to the American Chemistry Council’s Responsible Care® initiative, a stringent set of standards designed to advance the safe and secure management of chemical products and processes.

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About High Performance Building Solutions
Dow Corning is collaborating with industry professionals around the world to develop solutions to improve the energy efficiency of buildings, offer long lasting solutions and excellent technical support. Taking a holistic approach, Dow Corning brings together expertise from across the company to help customers find solutions to a wide range of high performance building challenges. Dow Corning High Performance Building Solutions include proven materials for structural and protective glazing, weatherproofing, insulating glass, window and door fabrication, and building materials protection, as well as innovations for high-efficiency insulation, LED lighting, thermal management systems, and the incorporation of photovoltaic cells and solar panels into building design.


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