Waterproof X Rings Sealing High Durability For Durometer / Petroleum Oils X-Rings, also known as Quad-Rings, can be used in a wide variety of static and dynamic sealing applications. The four-lobed design provides twice the sealing surface in comparison to a standard o-ring. The double-seal action requires less squeeze to maintain an effective seal. This reduction in squeeze means less friction and improved seal life. X-Ring parting lines are between the lobes, away from the