Experience a proactive approach to fire protection with the Rectorseal 66345 Fire Barrier Rated Putty Bag. Designed for effective sealing and UL tested, this 10 fluid ounce red putty is suitable for a wide range of applications in both commercial and residential settings. The Metacaulk brand ensures a quality product that meets fire safety standards.This 18 cubic inch putty is ideal for plugging gaps and joints, providing a barrier that helps prevent the spread of fire. Its ease of application and durable performance make it an essential component in your fire safety measures. Each bag is ready to use, ensuring you have exactly what you need for immediate application.