Primarily a painter of Native American subjects, Bert Seabourn painted figures, landscapes, and other subjects. As an expressionist, his technique included the layering of texture with drips, smears, runs, and splatters, working in acrylic, oil and watercolor.
His painting style evolved over the span of his education. He began with cartoon-style works at a young age and kept that style through his high school years. Once he began studying at Oklahoma City University in 1955, his works became more naturalistic. Seabourn also experimented with abstract painting while at OCU. Abstract Expressionism became the style for which he was known.
For more than 50 years, Seabourn exhibited throughout the United States, Europe, Asia, and South America. A select listing of locations of paintings in permanent collections includes the Vatican; China's National Palace Museum, Taiwan; Moscow University, Russia; the American Embassy, London; the Smithsonian Museum of Natural History; the President Gerald R. Ford Library Collection; the George and Barbara Bush Collection; and in Oklahoma City, the National Cowboy and Western Heritage Museum; the Oklahoma State Art Collection; Oklahoma City Museum of Art; and the Fred Jones Jr. Museum of Art.