3M Fire Barrier Dryer Ventilation Wrap (DVW) is lightweight and flexible for bathroom, dryer, and domestic kitchen ventilation ducts. 3M fire protection wrap solutions now include the new 3Mâ„¢ Fire Barrier Dryer Ventilation Wrap. Designed for a 1-hour rating, it offers strong, lightweight protection with the flexibility needed for tight spaces. Roll with trusted protection and get the job done.