Versatile and easy-to-install, GORE® 100% ePTFE sealing cord is a cost-effective solution for large steel flanges in general-use applications. Joint Sealant, the first form-in-place gasket, was invented by Gore more than 40 years ago. It is a time-tested sealing solution for steel flanges with large diameters, rectangular or irregular shapes, and rough or pitted surfaces.