The patented Bio-Seal is extremely pliable and molds itself to seals and skin equally well.  This awesome product can reduce and in most cases eliminate water leakage in the neck and wrist areas while allowing a more comfortable fit.  The seal does not contain latex which helps those who are allergic or prone to neck rash.
 
Not just for divers.  Surfers and other water sport enthusiasts will also find this a useful addition to their equipment.  Originally designed for use with neoprene seals, Bio seals will also improve fit and comfort of latex and silicone type seals. This product does contain oils which can cause early wear in latex type seals.  Rinse the Bio-seal before first use and your suit seals after each use with fresh water to help delay this effect.