Sealing member

A sealing member for maintaining a sealed joint between relatively vertical and horizontal surfaces, being either straight linear or corner joints, the sealing member comprising:

• a scaling material;
• a first substantially rigid limb having an upper boundary and lower boundary between which there extends on each side of the first limb an inner face and an outer face, the outer face of which can be fixed or sealed to the relatively vertical surface, and from which inner face, upper boundary or lower boundary there extends
• at least one second substantially rigid limb having an inner boundary and an outer boundary, the inner boundary of which is attached to the inner face or lower boundary of the first limb, and between which inner and outer boundaries there extends on each side of the second limb an upper face and a lower face, the lower face, a predetermined portion of which can be sealed to the relatively horizontal surface, and to accommodate and retain the sealing material between the second limb lower face and the horizontal surface, characterized in that a predetermined portion of the one of first limb inner face and the second limb lower face is layered with an anti-adherent material to form a releasable shuttering for the sealing material in the cavity formed between the first limb inner face and the second limb lower face and the adjacent horizontal surface, thereby providing a continuous up-standing containment cavity for the applied sealing material that will form a boundary wall bonded to the horizontal surface, a predetermined portion of the boundary wall being independent and releasable from the seal member to which initially attached.