I need to create a flame barrier which must be thin (5mm approx) and fairly strong. Asbestos sheet would have been ideal if only it was still available.
What I need it for is to block a chimney off with it, diverting the heat and fumes off to another flue. It'll be located fairly close above - but not actually touching - the flames coming from a 'living flame' gas fire immediately underneath.
Anyone know of a good substitute for asbestos sheet and where to obtain it?
Thank you, MJ