Sign in to your Account at Dow
Sign in with your account details to get access to our exclusive content.
Why Register?
Product Information
Access datasheets, exclusive content and applications
Samples
Request Samples to support formulation work
Stay Updated
Receive the latest news about products, news and more!
Build a Better Barrier™
High-performance buildings demand exceptional protection
High-performance buildings demand exceptional protection. Design with confidence using the DOWSIL™ Silicone Air Barrier System – a variety of silicone technologies that help you build a better barrier to protect the building envelope from air, water and vapor in both renovation and new construction.
The system’s key benefits include:
- Improved energy efficiency and durability
- Airtight performance that exceeds industry standards across a wide range of temperatures
- Long-term UV resistance and enhanced weatherproofing
- Water-based, low-VOC formulation
- Vapor-permeable and breathable
- Primerless adhesion to even the most challenging construction substrates
DOWSIL™ Silicone Air Barrier System offers better building performance
Learn more about a compatible system that protects buildings from air, water, and vapor.
DOWSIL™ Silicone Air Barrier System includes:
DEFENDAIR™ 200C Air and Weather Barries Coating
A 100 percent silicone liquid-applied air and weather barrier designed to protect against uncontrolled air infiltration and water penetration.
DEFENDAIR™ 200 Primer
A water-based silicone adhesion promoter developed to improve the adhesion of DEFENDAIR™ 200C Air and Weather Barrier Coating.
DOWSIL™ 791 Silicone Weatherproofing Sealant
A one-part, medium-modulus, neutral-curing silicone sealant for general weathersealing applications that is optimal for adhering STS to DEFENDAIR™ 200C Air and Weather Barrier Coating.
DOWSIL™ Silicone Transition Strips and Silicone Transition Corners
A high-performance, precured, 100 percent silicone rubber strips and corners designed to simplify installation and ensure continuous airtight transition from the window to the wall.
DOWSIL™ 758 Silicone Weather Barrier Sealant
A neutral, one-part silicone sealant designed to adhere to even the most demanding substrates without a primer.
DOWSIL™ 778 Silicone Liquid Flashing
A one-part, liquid silicone flashing that can be trowel-applied to weatherproof at window and door openings and other through-cavity penetrations.
DOWSIL™ Silicone Transition System (STS)
A preformed silicone strip and molded pieces designed for flashing and transition applications to weatherproof against air and water infiltration.
Explore our resources to learn what gives the DOWSIL™ Silicone Air Barrier System the potential to outperform current air barrier industry standards.
Air Barrier System Overview
Provides descriptions of the parts and products of the system and the benefits it can provide for your project such as airtightness, temperature flexibility and UV resistance.
DEFENDAIR ™ 200C Air and Weather Barrier Coating Application Guide
Provides installation and field testing guidance.
DOWSIL™ Silicone Transition System Application Guide
Includes in-shop and field installation instructions with illustrations.
DOWSIL™ Silicone Air Barrier System Tech Talks
Covers topics about DEFENDAIR™ 200C Air and Weather Barrier Coating absorption rates on various substrates, on damp sbmstrates and in rain, material thickness, certified applicators, warranty and tinting to medium gray.
DEFENDAIR™ 200C Air and Weather Barrier Coating Spec - Sec 07 27 26
Learn how the DOWSIL™ Silicone Air Barrier System has the potential to outperform current air barrier industry standards. This guide specification section has been prepared to assist you in incorporating DOWSIL™ products into construction project specifications.
Air Barrier Detail Drawings
Swipe to Scroll
| Description | Drawing | 2D | 3D | ||
|---|---|---|---|---|---|
| DWG | SKP | ||||
| ISOLATED PARAPET - SINGLE PLY OVER FLUID-APPLIED AWB | RW-1 | DWG | SKP | ||
| PARAPET - HOT ASPHALT WITH FLUID-APPLIED AWB OVER PARAPET | RW-2 | DWG | SKP | ||
| WRAPPED PARAPET - SINGLE PLY OVER SELF-ADHERED FLASHING | RW-3 | DWG | SKP | ||
| NO PARAPET - SINGLE PLY OVER FLUID-APPLIED AWB | RW-4 | DWG | SKP | ||
| ROOF TO RISING WALL - SINGLE PLY OVER FLUID-APPLIED AWB | RW-5 | DWG | SKP | ||
| UNVENTED ROOF SOFFIT | RW-6 | DWG | SKP | ||
Swipe to Scroll
| Description | Drawing | 2D | 3D | ||
| DWG | SKP | ||||
| CHANGE IN WALL SUBSTRATE | FW-1 | DWG | SKP | ||
| EXPANSION OR CONTROL JOINT - METHOD A | FW-2A | DWG | SKP | ||
| EXPANSION OR CONTROL JOINT - METHOD B | FW-2B | DWG | SKP | ||
| EXISTING WALL PERPENDICULAR TERMINATION | FW-3 | DWG | SKP | ||
| INSIDE AND OUTSIDE CORNER TREATMENT | FW-4 | DWG | SKP | ||
| SHEATHING JOINT TREATMENT METHODS | FW-5 | DWG | SKP | ||
| ELECTRICAL CONDUIT AND BOX PENETRATION | FW-6 | DWG | SKP | ||
| FLANGED MECHANICAL DUCT PENETRATION | FW-7 | DWG | SKP | ||
| PIPE PENETRATION | FW-8 | DWG | SKP | ||
Swipe to Scroll
| Description | Drawing | 2D | 3D | ||
| PDF | DWG | PDF | SKP | ||
| CONCRETE BALCONY SLAB WITH DECK COATING | FL-1 | DWG | SKP | ||
| OFFSET SHELF ANGLE WITH DEFLECTION JOINT | FL-2 | DWG | SKP | ||
| FLUSH SHELF ANGLE WITH DEFLECTION JOINT | FL-3 | DWG | SKP | ||
| FLOOR SLAB WITH DEFLECTION JOINT | FL-4 | DWG | SKP | ||
| BOLTED KNIFE PLATE AT SLAB WITH DEFLECTION JOINT | FL-5 | DWG | SKP | ||
Swipe to Scroll
| Description | Drawing | 2D | 3D | ||
| WINDOW ROUGH OPENING LIQUID FLASHING - METHOD A | W-1A 3D | SKP | |||
| WINDOW ROUGH OPENING LIQUID FLASHING - METHOD B | W-1B 3D | SKP | |||
| WINDOW WALL WITH SLAB EDGE COVER | W-2 | DWG | |||
| CURTAIN WALL WINDOW HEAD - METHOD A | W-3A-H | DWG | |||
| CURTAIN WALL WINDOW JAMB - METHOD A | W-3A-J | DWG | |||
| CURTAIN WALL WINDOW SILL - METHOD A | W-3A-S | DWG | |||
| CURTAIN WALL WINDOW HEAD - METHOD B | W-3B-H | DWG | |||
| CURTAIN WALL WINDOW JAMB - METHOD B | W-3B-J | DWG | |||
| CURTAIN WALL WINDOW SILL - METHOD B | W-3B-S | DWG | |||
| STOREFRONT WINDOW HEAD | W-4-H | DWG | |||
| STOREFRONT WINDOW JAMB | W-4-J | DWG | |||
| STOREFRONT WINDOW SILL | W-4-S | DWG | |||
| FLANGED WINDOW HEAD | W-5-H | DWG | |||
| FLANGED WINDOW JAMB | W-5-J | DWG | |||
| FLANGED WINDOW SILL | W-5-S | DWG | |||
| HOLLOW METAL DOOR HEAD | D-1-H | DWG | |||
| HOLLOW METAL DOOR JAMB | D-1-J | DWG | |||
How to check wet mil thickness
Discover the tools needed and see step by step instructions on how to check wet mil thickness.
How to apply DOWSIL™ 778 Silicone Liquid Flashing
Identify the tools needed and step by step instructions on how to apply DOWSIL™ 778 Silicone Liquid Flashing.
How to use the DOWSIL™ Silicone Air Barrier System
Learn how to properly seal around items such as pipe penetrations with DOWSIL™ Air Barrier System.
How to transition between the Air Barrier and the Below-Grade Waterproofing
Study how to seal between the air barrier and the below-grade waterproofing.
How to roll apply DEFENDAIR™ 200C Air and Weather Barrier Coating
See how to roll apply DEFENDAIR™ 200C Air and Weather Barrier Coating.
How to spray apply DEFENDAIR™ 200C Air and Weather Barrier Coating
Learn how to spray apply DEFENDAIR™ 200C Air and Weather Barrier Coating.
We are committed to connecting you with experts and resources to tackle any challenge.