Fire protected elastomeric insulation

A material comprising an elastomer or thermoplastic elastomer being expanded to a density of less than 200 kg/m3 according to ISO 845 as a core (C) being covered with at least one inner protective layer (B) comprising a metal foil showing a thickness of 1-400 microns, or fibrous material which is at least flame retardant according to DIN 4102 B1 and/or ASTM E-84 flame spread 100 and outer protective layer (A) consisting of fibrous material which is at least flame retardant according to DIN 4102 B1 and/or ASTM E-84 flame spread 100 and wherein, if (A) and (B) are both of fibrous nature, the ratio of average mesh or sieve opening of (A) to (B) is bigger than 1:1, wherein the outer protective layer (A) is the outermost layer of said material, wherein the closed cell content of the expanded core (C) is at least 80%.