I suspect these won’t work for any pipework to and from a fire (they’ll melt !)

The ATK Airtight Membrane Kit has been developed to provide an airtight seal around pipework of all types that passes through the walls of buildings. The ATK Airtight Membrane Kit can fit around any size pipe – from cables right through to soil pipes – and offers a robust, reliable and cost-effective solution.

http://www.greenbuildingstore.co.uk/page–pipework-seals.html