Rapid seal flat roof leak repair. Flowable repair compound stops roof leaks until you can make permanent repairs. Just apply Rapid Seal a half-inch deep in the leak area. Disperses easily without special tools, training or labor. Running water swells the material and carries it to the leak site for sealing. When ready for permanent repair, simply sweep or shovel away the material. Dry material is reusable after being collected. Free from solvents or toxins. Packaged in a resealable 4-gallon plastic container so there are no messy bags to worry about. Use it on any flat roof. 40 to 110 degrees F temperature limit. It contain clay. Measures 11-inches length by 11-inches width by 13-1/4-inches height.