2000 m from the nearest west Marine. Will hit island water works and see what they have and read the labels.
If the boat gets hit by lightning your solar and bilge pumps are likely toast.If you have solar why can't you turn the batts off and let a bilge pump wired directly to the batts drain the water? I realize keel stepped masts get water into the boat and that needs to be removed.
Deck stepped should have no leaks and may not need to leave the bilge pump on. Solar should keep the batts topped up.
I use it aboard, especially to clean up grease or oil. I understand, however, if left to stand for extended periods, it will corrode some metals. Aluminum in particular. You are cautioned not to use it on aircraft, with aluminum structures, and not to leave it on any aluminum for more than 10 minutes, without thoroughly rinsing. Simple Green even developed a special formula for aircraft, as a result. The Air Force banned the original formula.A gallon of Simple Green never hurt anything and it smells good.