An intumescent seal comprises a first body or mass of intumescent material (3) which provides a hard foam on heating and a second body or mass (4) of intumescent material which produces a soft foam on heating. An intumescent seal comprises at least one body of intumescent material (3) which produces a hard foam on heating and at least one body of intumescent material (4) which produces a soft foam on heating, the intumescent materials (3, 4) being carried by at least one of a pair of members or parts between which gap (24) is defined at least in a predetermined relative position of the two members or parts, the intumescent material being disposed so as to intumesce into the gap (24) on heating at least when the members or parts are in said predetermined position.

A joint filler for use in joints between structural elements comprising: at least one layer of a substantially non-compressible, moisture blocking material; at least two layers of a compressible and resilient, moisture blocking material, each layer being in surface to surface contact with a layer of non-compressible material; the layers of material are combined to form a strip of interleaved compressible and non-compressible layers, and in an uncompressed state thicker than a joint.

A joint seal for use in joints that may be exposed to water comprises at least one layer of a compressible impregnated open cell foam. On at least a portion of the surface of the compressible foam there is positioned a hydrophilic material.

A fire resistant door edge construction composed of an incombustible door stile including an intumescent seal intimately fixed in a groove in the stile, over a rigid strip of high density material located in the base of the groove for anchoring hinge screws.