Deliver To:

  • Afghanistan
  • Albania
  • Algeria
  • Amer.Virgin Is.
  • American Samoa
  • Andorra
  • Angola
  • Anguilla
  • Antarctica
  • Antigua Barbuda
  • Argentina
  • Armenia
  • Aruba
  • Australia
  • Austria
  • Azerbaijan
  • Bahamas
  • Bahrain
  • Bangladesh
  • Barbados
  • Belarus
  • Belgium
  • Belize
  • Benin
  • Bermuda
  • Bhutan
  • Bolivia
  • Bonaire, Saba
  • Bosnia-Herz.
  • Botswana
  • Bouvet Island
  • Brazil
  • Brit.Ind.Oc.Ter
  • Brit.Virgin Is.
  • Brunei Daruss.
  • Bulgaria
  • Burkina Faso
  • Burundi
  • C. African Rep.
  • Cambodia
  • Cameroon
  • Canada
  • Cape Verde
  • Cayman Islands
  • Chad
  • Chile
  • Christmas Islnd
  • Coconut Islands
  • Colombia
  • Comoros
  • Congo
  • Cook Islands
  • Costa Rica
  • Cote d'Ivoire
  • Croatia
  • Curacao
  • Cyprus
  • Czech Republic
  • Dem. Rep. Congo
  • Denmark
  • Djibouti
  • Dominica
  • Dominican Rep.
  • Ecuador
  • Egypt
  • El Salvador
  • Equatorial Guin
  • Eritrea
  • Estonia
  • Ethiopia
  • Falkland Islnds
  • Faroe Islands
  • Fiji
  • Finland
  • France
  • Frenc.Polynesia
  • French Guiana
  • French S.Territ
  • Gabon
  • Gambia
  • Georgia
  • Germany
  • Ghana
  • Gibraltar
  • Greater China (Chinese Mainland)
  • Greater China (Hong Kong SAR)
  • Greater China (Macau SAR)
  • Greater China (Taiwan)
  • Greece
  • Greenland
  • Grenada
  • Guadeloupe
  • Guam
  • Guatemala
  • Guinea
  • Guinea-Bissau
  • Guyana
  • Haiti
  • Heard McDon.Isl
  • Honduras
  • Hungary
  • Iceland
  • India
  • Indonesia
  • Iraq
  • Ireland
  • Israel
  • Italy
  • Jamaica
  • Japan
  • Jordan
  • Kazakhstan
  • Kenya
  • Kiribati
  • Kosovo
  • Kuwait
  • Kyrgyzstan
  • Laos
  • Latvia
  • Lebanon
  • Lesotho
  • Liberia
  • Liechtenstein
  • Lithuania
  • Luxembourg
  • Madagascar
  • Malawi
  • Malaysia
  • Maldives
  • Mali
  • Malta
  • Marshall Islnds
  • Martinique
  • Mauritania
  • Mauritius
  • Mayotte
  • Mexico
  • Micronesia
  • Minor Outl.Isl.
  • Moldova
  • Monaco
  • Mongolia
  • Montenegro
  • Montserrat
  • Morocco
  • Mozambique
  • Myanmar
  • N.Mariana Islnd
  • Namibia
  • Nauru
  • Nepal
  • Netherlands
  • New Caledonia
  • New Zealand
  • Nicaragua
  • Niger
  • Nigeria
  • Niue
  • Norfolk Island
  • North Macedonia
  • Norway
  • Oman
  • Pakistan
  • Palau
  • Panama
  • Pap. New Guinea
  • Paraguay
  • Peru
  • Philippines
  • Pitcairn
  • Poland
  • Portugal
  • Puerto Rico
  • Qatar
  • Reunion
  • Romania
  • Russian Fed.
  • Rwanda
  • S. Sandwich Ins
  • S.Tome,Principe
  • Saint Helena
  • Saint Lucia
  • Samoa
  • San Marino
  • Saudi Arabia
  • Senegal
  • Serbia
  • Seychelles
  • Sierra Leone
  • Singapore
  • Sint Maarten
  • Slovakia
  • Slovenia
  • Solomon Islands
  • Somalia
  • South Africa
  • South Korea
  • Spain
  • Sri Lanka
  • St Kitts&Nevis
  • St. Vincent
  • St.Pier,Miquel.
  • Suriname
  • Svalbard
  • Swaziland
  • Sweden
  • Switzerland
  • Tajikistan
  • Tanzania
  • Thailand
  • Timor-Leste
  • Togo
  • Tokelau
  • Tonga
  • Trinidad,Tobago
  • Tunisia
  • Turkey
  • Turkmenistan
  • Turksh Caicosin
  • Tuvalu
  • Uganda
  • Ukraine
  • United Kingdom
  • United States
  • Uruguay
  • Utd.Arab Emir.
  • Uzbekistan
  • Vanuatu
  • Vatican City
  • Venezuela
  • Vietnam
  • Wallis,Futuna
  • West Sahara
  • Yemen
  • Zambia
  • Zimbabwe

Build a Better Barrier™

Man spraying AirBarrier system, DefendAir, on a wall outside

Build a Better Barrier™

Building & Infrastructure Weatherproofing Air 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
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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:

Explore our resources to learn what gives the DOWSIL™ Silicone Air Barrier System the potential to outperform current air barrier industry standards.

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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.

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DOWSIL™ Silicone Transition System Application Guide

Includes in-shop and field installation instructions with illustrations.

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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.

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DOWSIL™ Air Barrier Coatings Specification, Section 07,27 and 29

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.

Video

How to check wet mil thickness

Discover the tools needed and see step by step instructions on how to check wet mil thickness.

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Video

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.

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Video

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.

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Video

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.

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Video

How to roll apply DEFENDAIR™ 200C Air and Weather Barrier Coating

See how to roll apply DEFENDAIR™ 200C Air and Weather Barrier Coating.

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How to spray apply DEFENDAIR™ 200C Air and Weather Barrier Coating

Learn how to spray apply DEFENDAIR™ 200C Air and Weather Barrier Coating.

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