Sealing member (10) is adapted to be installed independently or as a component of a sealing assembly, to maintain a sealed joint between relatively vertical and horizontal surfaces (A & B) either as a straight linear or corner joint. The sealing member (10) has a first upper limb (11) for contacting the vertical surface (A) and a second outer limb (12) for containment of sealing material (27) on the horizontal surface (B). Lower face (17) of limb (12) and/or inner face (20) of upper limb (11) are wholly or partially layered with an anti-adherent material (13) to act as shuttering between the seal member (10) and the sealing materials.