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  Dow Corning  We help you invent the future.
Build A Better Barrier

The Dow Corning® Silicone Air Barrier System

The only water-based, 100% silicone air barrier on the market providing long-term performance backed by a system warranty. The easy-to-install system offers unlimited UV exposure and superior breathability.

Air and Water Protection for More Energy-Efficient Buildings

Design, build and renovate toward more sustainable, near-zero-energy buildings with this suite of compatible high-performance silicone products engineered to resist extreme environmental conditions. Features and benefits of the Dow Corning Silicone Air Barrier System include:
  • Simplified installation, can be rolled or sprayed on
  • PASS - NFPA 285 tested Assembly
  • Airtighness exceeding industry standards
  • Vapor permeable & breathable
  • Long-term UV resistance
  • Elastomeric, to accommodate building movement
  • Complete material compatibility
  • Expert technical support

Components of the Dow Corning® Silicone Air Barrier System

Window Graphic Dow Corning® DefendAir 200
100% liquid-applied (rolled or sprayed) seamless air and weather barrier suitable for use on many common wall substrates.

The Dow Corning® Silicone Transition System
High-performance, pre-cured 100% silicone rubber strips and corners used for sealing window-to-wall transitions.

Dow Corning® 758 Silicone Weather Barrier Sealant
A primerless solution to the challenge of sealing plastic and polyolefin-based window flashing, fenestration materials and building wraps.

Dow Corning® 791 Silicone Weatherproofing Sealant
A proven primerless performer providing robust adhesion to the Dow Corning® Silicone Air Barrier System.

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Learn More
Dow Corning® Silicone Air Barrier
System Book
 (19 MB PDF)
Dow Corning® Silicone Air Barrier
System Overview
 (7 MB PDF)
Tech Talks (4 MB PDF)
Warranty Information (1.4 MB PDF)
Dow Corning® DefendAir 200 Air Barrier
Specification, Section 07 27 29
Application Guides
Dow Corning® DefendAir 200 (4.5 MB PDF)
Dow Corning® Silicone Transition System 
(6.4 MB PDF)
Drawing Details
Air Barrier (All)
Base of Wall (3)
Field of Wall (15)
Glazing - Free Standing (9)
Horizontal Projection (6)
Penetrations (6)
Punched Opening (16)
Top of Wall (5)
Product Information Sheets
Dow Corning® DefendAir 200 (1 MB PDF)
Dow Corning® 758 Silicone Weather Barrier Sealant (1 MB PDF)
Dow Corning® Silicone AirBarrier System videoDow Corning® Silicone Air Barrier System Video
Dow Corning® Silicone AirBarrier System Dow Corning® Silicone Transition System
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