Chemicals and water contaminants have to be taken into account for the durability of sensing cables: the fibre glass in particular can be degraded by chemicals such as acetylene, ammonia and dimethyl sulfoxide with a reduction of the failure strength with ageing that is faster than that for water. Other chemicals may react with the coating or strengthening members of structured sensing cables reducing their durability in the actual deployment environment.

A small increase of Brillouin shift (0.5 MHz/MGy) and linewidth induced by exposition to gamma radiation is also reported, although having negligible impact on D-FOS usability.