Rage Ultra Xtra is specially formulated to allow for extended work times- up to 40 minutes at 75°F (24°C). Manufacturers and technicians can mix and spread large quantities knowing they have enough time to work larger surfaces, saving time and increasing productivity. Rage Ultra XTRA can also be mixed with Rage Ultra for the ultimate flexibility in work time in most any temperature while maintaining the proper mix ratio. Blue cream hardener included. Gallon package comes with 4 oz. tube of blue cream hardener.