Abstract: A gasket with heat-insulating properties is provided for such uses as for mounting a carburetor on an internal-combustion-engine casting. A thick core of heat-insulating resin, such as phenolic resin, is sandwiched between two thin cutout sheets of resilient gasket material. The core provides the heat insulation, and the gasket material provides the resilience needed to assure sealing on rough surfaces. Heat-dissipating fins or the like may also be provided, as well as rings of heat-insulating material which can surround the bolts used to hold the carburetor in place. The core is molded to shape, while the gasket material may be cut out to shape and secured to it by a thermo-setting resin, such as a nitrile-rubber-phenolic-resin material.

Abstract: A sealing boundary gasket for compression between flanged portions of two mating metal members each of which has two longitudinal flat side portions that lie in different planes from each other and end portions that join the side portions. A one-piece integrally molded elastomeric gasket is provided having two lengthwise strip portions that are generally planar and two end strip portions. Each bolt opening is encircled by a flexible gasket portion that extends inwardly from the longitudinal portions and is readily flexed to a different plane therefrom. Each opening is provided with a circular rib which, as seen in cross section, is wedge-shaped; for example, its thinnest portion may face the outside of the gasket and its thickest portion may face directly to the inside of the gasket. Preferably, one side of one surface of the gasket is flat and the other one is ribbed.