There are companies that will supply sea water “brine”.  Brine is a saturated solution of sea water minerals where as much pure water as possible has been removed without causing crystallization that would separate the sodium chloride from the other minerals. 

It is a thick oily liquid that feels good on the skin but a word of caution here, it is way too strong to put in the eyes, for example.  Some companies will even remove most of the sodium chloride from these oily solutions and sell these products as magnesium oil from the ocean. 

They use this name because the biggest component is magnesium, accompanied by the proper trace mineral balance needed for the difficult task of metabolizing the magnesium.  We will say more about this important topic later.