The steel panels inside the tunnel were due to be refurbished in 2015 as a means of upgrading and continually maintaining the tunnel lining.
On the rear of each panel which lined the tunnel was a sheet which acted as a backing pad. When the original steel panels were removed, it was found that these backing sheets were indeed asbestos containing panels. A total of 1001 panels had to be removed and fully refurbished with the Resistant Multi-pro to nullify the risk of asbestos.
The boards were adhered to the back of the existing steel panels using Ceramix TC Caulking which is a high temperature adhesive sealant. The works were carried out off-site in Mc Nealy-Brown’s workshops nearby Sittingbourne Kent during the day then returned to the tunnel and re-fitted in the evenings to allow for the least disruptive, most efficient method of refurbishment.