air inflatable seals are used to seal cable running in ducts against water and gases. They feature full re usability, sealing of multiple cables without separation clips and durable sealing behaviour (>20 years), reducing total cost of ownership with regards to alternative sealing solutions. Furthermore, they use no CO2 as inflating agent, then protecting our environment. Reasons for using sealing technology for feedthroughs to protect against water entry or gas diffusion e.g. carbon monoxide ï?·Prevention of personal injury caused by gas diffusion ï?·Prevention of damage to property in buildings and technical rooms ï?·Prevention of short-circuits caused by water entry ï?·Prevention of network failure caused by optical fibre breakage (optical fibres are particularly sensitive to water entry or immersion in water) Cable manhole facilities do not have to be pumped out Prevention of costly repair and renovation measures