Enviro-Dri provides exceptional performance as an air and water barrier to meet the high demands of multi-family construction. Enviro-Dri weather-resistive, air and water barrier system is designed to coat and permanently seal external sheathing and sheathing joints and prevent water passage and air infiltration/exfiltration. Enviro-Dri is highly durable and unaffected by high winds, wind driven rain and weatherization. Enviro-Dri stays in place as long as the sheathing stays in place.