A method for producing an anti-resonant hollow-core fiber which comprises a hollow core extending along a longitudinal axis of the fiber and a casing region that surrounds the hollow core and comprises a plurality of anti-resonant elements, comprising the method steps of: (a) providing a sheath tube , which comprises a sheath tube inner bore and a sheath tube longitudinal axis, along which a sheath tube wall extends, which wall is delimited by an inner face and an outer face, (b) providing a number of anti-resonant element preforms , wherein the anti-resonant element preforms are composed of a plurality of nested structural elements (4a; 4b), (c) arranging the anti-resonant element preforms at desired positions on the inner face of the sheath tube wall to form a primary preform for the hollow-core fiber, which primary preform comprises a hollow core region and a casing region, and (d) elongating the primary preform to form the hollow-core fiber or further processing the primary preform to form a secondary preform from which the hollow-core fiber is drawn, wherein the further processing comprises carrying out one or more of the following hot-forming processes once or repeatedly: (i) elongation, (ii) collapse, (iii) collapse and simultaneous elongation, (iv) collapse of additional casing material, (v) collapse of additional casing material and subsequent elongation, (vi) collapse of additional casing material and simultaneous elongation, characterized in that providing the anti-resonant element preforms comprises a fixing measure using a sealing or bonding compound containing amorphous SiOz particles, wherein the structural elements (4a; 4b) are fixed to one another using the sealing or bonding compound by vitrifying the sealing or bonding compound by heating when carrying out a hot-forming process according to method step (d). (a) providing a sheath tube , which comprises a sheath tube inner bore and a sheath tube longitudinal axis, along which a sheath tube wall extends, which wall is delimited by an inner face and an outer face, (b) providing a number of anti-resonant element preforms , wherein the anti-resonant element preforms are composed of a plurality of nested structural elements (4a; 4b), (c) arranging the anti-resonant element preforms at desired positions on the inner face of the sheath tube wall to form a primary preform for the hollow-core fiber, which primary preform comprises a hollow core region and a casing region, and (d) elongating the primary preform to form the hollow-core fiber or further processing the primary preform to form a secondary preform from which the hollow-core fiber is drawn, wherein the further processing comprises carrying out one or more of the following hot-forming processes once or repeatedly: (i) elongation, (ii) collapse, (iii) collapse and simultaneous elongation, (iv) collapse of additional casing material, (v) collapse of additional casing material and subsequent elongation, (vi) collapse of additional casing material and simultaneous elongation, (i) elongation, (ii) collapse, (iii) collapse and simultaneous elongation, (iv) collapse of additional casing material, (v) collapse of additional casing material and subsequent elongation, (vi) collapse of additional casing material and simultaneous elongation, <EOS>