An edge coated gasket includes a base sheet made of compressible gasket
material and having opposed faces and an interior edge surrounding and
defining an aperture. An edge coating of polymer or other material is
disposed on and seals the interior edge of the base sheet and may project
beyond the facial planes of the base sheet to define protruding rims
extending around the aperture. Face coatings may also be applied to one
or more of the faces extending in relatively narrow strips around the
aperture of the base sheet. When clamped between flange surfaces, the
edge coating engages, conforms to, and seals against the flange surfaces
to provide a seal against both interfacial and intersticial migration of
fluid past the gasket. At the same time, the inherently good compression
failure resistance of the compressible gasket material of the base sheet
is preserved. Thus, a gasket with enhanced sealability and compression
failure resistance is provided. A unique method of making such an edge
coated gasket is also disclosed.