AFI Update on Creosote Extension and use in UK fencing.

Government 1 April 2026 – Creosote PT8 renewal decision

CAS number: 8001-58-9

EC number: 232-287-5

Summary: GB active substance renewal decision for creosote

Supporting information: The approval of creosote is renewed for the treatment of wood for the following uses:

railway sleepers
transmission poles
fencing (safety critical uses, namely those requiring compliance with BS8417 service factor D)
surface treatment of wood for the above uses when modified at the point of installation

The new expiry date is set at 31 March 2033.

Full details are available in the accompanying decision document (HSE 2026-002).