DuraBarrier Firewalls are fire, blast, moisture and impact resistant. This modular wall system consists of two mechanically bonded sheets of galvanized steel providing complete fire protection for up to 6 hours. DuraBarrier’s cement fiber core shields your transformer and electrical equipment from heavy winds (up to category 5 hurricane conditions) and offers favourable noise reduction. The lightweight, demountable design makes installation and maintenance easy, allowing full access to your transformer when needed.