It's proven. Roof coatings can save you money on roof replacement and cooling costs.
Almost all types of roofs can be coated. Metal, Built-up (BUR), Concrete, Modified Bitumen, Spray Polyurethane Foam and Single-ply (EPDM, TPO & PVC). Ballasted or gravel surfaced roofs are not acceptable roof surfaces for roof coatings.
A properly applied roof coating system can last up to 10 years or more depending on overall coating thickness. It can also be recoated to extend the life even longer.
Don't hesitate to call on out of state contractors if you are unable to find one in South Dakota. You may not be able get a great deal on a small roof but they may have more experience than anyone local. Just make sure they are licensed and insured.