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Complete Silicone Air Barrier System
DOWSIL
07 27 00 Air Barriers
The DOWSIL™ Silicone Air Barrier System – previously offered under the Dow Corning® brand name – provides airtight performance that exceeds industry standards, accommodates building movement and eliminates system failures due to material incompatibility.
The only water-based 100% silicone air barrier complemented by a fully compatible system, this system helps architects improve the airtightness of the building envelope, saving energy and reducing costs of uncontrolled air leakage.
The DOWSIL™ Silicone Air Barrier System, which delivers long-term UV resistance, primerless adhesion, vapor permeability and breathability, is ABAA evaluated and provides performance that passes NFPA 285 assembly testing. The water-based, low-VOC formulation can be applied by a one-coat spray or be roller-applied at temperatures as low as -6 C (20 F).
The DOWSIL™ Silicone Air Barrier System features DOWSIL™ DefendAir 200, a 100-percent silicone, liquid-applied air and water barrier. A range of high-performance components complements the air barrier, including a fluid-applied flashing, precured silicone rubber strips and corners, and select DOWSIL™ silicone weatherproofing sealants. A full-system warranty is available.
Additional Information
Dow High Performance BuildingBuild a Better Barrier™
DOWSIL™ Silicone Air Barrier System
Air Barrier Contractor Handbook
Contact Information
Phone: 1-800-248-2481
Email:
construction@dowcorning.com
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July 2026