I am looking for a dark green gloss to go behind a wood burner, would prefer heat resistant to be on the safe side as it has a back boiler that heats up our water so there are copper pipers that go through the wall and get quite hot
Unfortunately we do not have a product we can recommend for this application with a dark green colour.
But if a white or pastel colour is acceptable the substrate to be painted is concrete, brick or a mineral board not exposed to temperatures over 180°C you could consider Tikkurila Muuri.