Devcon 50610 Leak-Stopper Steel Epoxy Putty - 2 oz. Fast-curing putty that sets rock hard when mixed Molds to any surface, squeezing into cracks and holes to create a permanent seal Handling time: 3-4 minutes; Set time: 15 minutes; Cure time: 24 hours Great for automotive repairs, resistant to water, gas, oil, and antifreeze Dries to a dark gray color