In 1958, Glastex employed twenty-two people and produced on average six boats a day before expanding to Monmouth later that year.
The Monmouth, Illinois facility began building Sea Star Boats in 1968 and continued until 1981.
Fourteen feet in length, the first model was a centerdeck-style, all fiberglass runabout that could accept outboard motors up to 50 hp (37 kW).
The Sea Sprite Boat Co. eventually became known as United Marine Corporation and was based in Watseka, Illinois.
Melvin Redeker sold in 1984 to Robert F. Smith and a fire gutted the factory in 1990 which along with bankruptcy, led to the end of production of Sea Sprite Boats.