FortiCel™ is applied by certified technicians through a spray-on application that is not disruptive to the construction process. Once the building is dried-in, the FortiCel™ coating is applied to all chosen surfaces. Other tradesmen may continue working while the product is being applied but it is important to perform the application prior to installation of insulation. FortiCel™ will dry in 20 minutes to an hour and will not wash off or degrade.