Penrith Roller Shutters Sentry Fireshield is ideal for residential or commercial use, particularly in areas prone to fire hazards, making it the ideal option for BAL 40 rated Fire Shutters. Manufactured to the highest standards with state of the art equipment, the Sentry Fireshield profile is available in a 40mm curved profile. The Sentry Fireshield has superior strength offering increased security and performance.