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This SAE Information Report covers thin coatings of resinous based materials that can be placed on the metallic outer diameter of radial lip-type shaft seals to provide sealing when the mating bore finish is too rough to insure a proper seal (typically when finish exceeds 2.54 μm Ra, or in pressurized applications.) The coatings will have the following characteristics: a Material shall dry to a tough, flexible, and non-tacky film. b Thickness typically ranges from 0.005 to 0.076 mm. c It shall not crack, flake, or powder when scraped. d Coating shall adhere to seal case as noted in text. e The sealer shall not show any evidence of peeling, blistering, softening, or dissolution when tested in media to be sealed.