ZJX1020 Features: * Stops running water instantly * Non-shrinking, expands as it sets and won"t pull away from edges of patch * Will set up under water * Sets fasts-3-5 minutes * Exceptional structural strength * Dry powder form, just add water * Easy to mix and put in place-requires no special equipment * Nontoxic when set * Nonmetallic, will not rust out or deteriorate * 1 gallon