Since 1933, Southwestern Petroleum Corporation has offered a wide range of products under the SWEPCO brand for the bp applicationsmaintenance and protection of industrial, commercial and institutional property. These products have stood the test of time in some of the harshest climates and environments on the planet. SWEPCO roofing products and protective coatings enjoy wide customer acceptance because they deliver the benefits property owners and managers seek ... longer service life, reduced application costs, energy savings, reduced maintenance costs and freedom from problems.