There are actually four sauces in the state, depending upon which region.
In the eastern part of te state, including the coast, the traditional vinegar and pepper sauce is the norm.
In the central Midlands area, including the Columbia area, it's mustard sauce.
The southwest section of South Carolina is where you'll find a heavier, tomato based sauce (one you can find across the whole USA.
The northwest part specializes in the famous sauce that combines ketchup with the
traditional vinegar and pepper sauce. This is often referred to as Carolina Red."
The guide has recipes for all four sauces if you're interested in making some of your own.
Your vinegar and pepper sauce consists of apple vinegar, red pepper flakes, black pepper, salt, ketchup and dark brown sugar.
Cuein' All the Way. --RoadDog