High temperature low emitting mineral wool product

A mineral fiber product, wherein the product is in the form of a preformed pipe section and comprises mineral fibers bound by a cured binder composition, a non-cured binder composition comprising one or more oxidized lignins, and wherein heating the mineral fiber product containing the cured binder composition to a temperature of 600° C. results in an emission of less than 1500 ppm isocyanic acid (ICA) per gram solids content per second and/or less than 1000 pg ICA per gram of sample, and wherein the mineral fiber product satisfies conditions for a Maximum Service Temperature of at least 600° C., according to the Maximum Service Temperature plate test of EN 14706:2012.