Patent ID: 8360437

Claim:
A system for sealing in a conduit a space between an inner wall of the conduit and at least one pipe or cable extending through the conduit, wherein the system comprises: a plurality of rubber elements for surrounding the at least one pipe or cable such that each is placeable about the at least one pipe or cable in a non-coaxial fashion, the plurality of rubber elements for providing in the conduit a support-structure which is clampable between the inner wall and the at least one pipe or cable; and a sealant for application against the support-structure and for sealing off at least one end of the conduit between the inner wall and the at least one pipe or cable, the support-structure being capable of supporting at least the sealant, wherein each rubber element is made of a fire-resistant vulcanized rubber of a thermally substantially non-expandable type, and wherein the sealant is made of a fire-resistant polymer which is vulcanizable at room temperature under exposure to humidity and which is also of the thermally substantially non-expandable type, wherein the rubber or the polymer of the thermally substantially non-expandable type comprises rubber or polymer, respectively, which is free from components which would on heating cause the rubber or the polymer to expand to an extent larger than the extent to which the rubber or the polymer itself expands on such heating, wherein each rubber element is a longitudinal tubular element having a mantle wall, and with at least some of the rubber elements having a non-split mantle wall.