Gasket underneath sink drain leaking. how would I go about this one? : Plumbing(01)

Gasket underneath sink drain leaking. how would I go about this one? : Plumbing(01)

Image gallery: Sink Gasket Leaking

Kitchen Sink Drain Gasket Leaking Besto Blog Gasket underneath sink drain leaking. how would I go about this one? : Plumbing Sink Drain Gasket leaking - any at home repair options? : Plumbing