I also have Seb Derm.  

 

Happily, I have found an all natural, inexpensive daily treatment that works.  Twice a day, I apply apple cider vinegar to the problem areas of my face very thoroughly.  As long as I do this daily as a maintenance, I see no symptoms whatsoever.  I have been using this method for 2 years now.  After several months of having it under control, I now typically just do it once (sometimes twice) a day and use white vinegar (not as effective, but less stinky).  Again, no symptoms.

 

For my scalp, I use Nioxin Scalp Recovery medicated cleansing shampoo and conditioner.  Been using it for 5 years.  No symptoms, whatsoever.  Previously I had red sores along my scalp line and dandruff like flakes.