Ultra seal gasket exhuast - 250x250mm Now you can easily make your own gaskets with Ultra seals high quality gaskets for exhaust parts. Cut the sheet to fit your exhaust system, manifold or similar. Made of high temperature steel core / graphite coated exhaust material. Designed to be able to move without the gasket starting to leak. The gasket forms itself to seal minor irregularities of a surface. The gasket has good thermal conductivity and works just as well for the street car as for the drag racing car. Specifications: Dimensions: 250 x 250mm Thickness: 1.5mm