Pre-finished which requires no coating. Eliminates the need for separate taping and topping compounds. Only the tapered edge needs to be immediately feathered, saving 75% labor and drying time. Ultra A Flex creates any inside or outside corners including 45 deg. and 90 deg. corners. Ultra A Flex will not crack, pop-out, or chip. Self-straightening, will cover up to 1-1/2" gap correcting framing mistakes.