Which gaskets work in Flange Isolation Kits?

Customers will occasionally ask for a flange insulation or isolation kit or gasket to electrically insulate one flange from the mating flange. Kits are available from a variety of distributors and include an insulating gasket along with a sleeve for the bolts and insulating washer to be installed under the steel washers and nuts. Pheps offers many gasket styles with good electrical insulating properties (Dielectric Breakdown Voltage values are available from Application Enginnering).