DOWSIL Defend Air 200C  

A 100% silicone liquid applied Air and Weather Barrier designed to protect against air infiltration and water penetration. The vapor permeable, one component, water-based coating cures to form a flexible membrane that is impervious to water but has the ability to “breathe,” allowing water vapor to escape from inside the substrate. 

• Technical Data  
• SDS Sheets 
• LEED Information 

Packaging  
4.5 gal pails 
51.5 gal drums