An antireflective coating composition precursor comprising: (a) a first part comprising: (i) silica nanoparticles in an amount in the range of from 50 to 99 wt.-%, preferably in the range of from 70 to 85 wt.-%, relative to the total weight of the solid contents of the first part of the precursor; (ii) a first acid in such an amount that the first part of the precursor exhibits a pH in the range of from 1.5 to 5.5, preferably in the range of from 2 to 3; (iii) polymer particles in an amount in the range of from 1 to 50 wt.-%, preferably in the range of from 5 to 30 wt.-% of the solid contents of the first part of the precursor; (iv) at least one rheology modifier compound in an amount in the range of from 0.01 to 30 wt.-%, preferably in the range of from 2 to 20 wt.-%, relative to the total weight of the solid contents of the first part of the precursor; (v) water; (b) a second part comprising: (i) a second acid in such that the second part of the precursor exhibits a pH in the range of from 1.5 to 5.5, preferably in the range of from 2 to 3; (ii) at least one metal salt in an amount in the range of from 1 to 40 wt.-%, preferably in the range of from 5 to 20 wt.-%, relative to the total weight of the solid contents of the second part of the precursor; (iii) at least one rheology modifier compound in an amount in the range of from 0,1 to 30 wt.-%, preferably in from 2 to 20 wt.-%, relative to the total weight of the solid contents of the second part of the precursor; (iv) water; wherein the at least one second acid is distinct from the at least one first acid and wherein the ratio of part to part is in the range of from 10:1 to 1:10, preferably in the range of from 5:1 to 1:5, more preferably in the range of from 2:1 to 1:2, even more preferably in the range of from 1.5:1 to 1:1.5. (a) a first part comprising: (i) silica nanoparticles in an amount in the range of from 50 to 99 wt.-%, preferably in the range of from 70 to 85 wt.-%, relative to the total weight of the solid contents of the first part of the precursor; (ii) a first acid in such an amount that the first part of the precursor exhibits a pH in the range of from 1.5 to 5.5, preferably in the range of from 2 to 3; (iii) polymer particles in an amount in the range of from 1 to 50 wt.-%, preferably in the range of from 5 to 30 wt.-% of the solid contents of the first part of the precursor; (iv) at least one rheology modifier compound in an amount in the range of from 0.01 to 30 wt.-%, preferably in the range of from 2 to 20 wt.-%, relative to the total weight of the solid contents of the first part of the precursor; (v) water; (i) silica nanoparticles in an amount in the range of from 50 to 99 wt.-%, preferably in the range of from 70 to 85 wt.-%, relative to the total weight of the solid contents of the first part of the precursor; (ii) a first acid in such an amount that the first part of the precursor exhibits a pH in the range of from 1.5 to 5.5, preferably in the range of from 2 to 3; (iii) polymer particles in an amount in the range of from 1 to 50 wt.-%, preferably in the range of from 5 to 30 wt.-% of the solid contents of the first part of the precursor; (iv) at least one rheology modifier compound in an amount in the range of from 0.01 to 30 wt.-%, preferably in the range of from 2 to 20 wt.-%, relative to the total weight of the solid contents of the first part of the precursor; (v) water; (b) a second part comprising: (i) a second acid in such that the second part of the precursor exhibits a pH in the range of from 1.5 to 5.5, preferably in the range of from 2 to 3; (ii) at least one metal salt in an amount in the range of from 1 to 40 wt.-%, preferably in the range of from 5 to 20 wt.-%, relative to the total weight of the solid contents of the second part of the precursor; (iii) at least one rheology modifier compound in an amount in the range of from 0,1 to 30 wt.-%, preferably in from 2 to 20 wt.-%, relative to the total weight of the solid contents of the second part of the precursor; (iv) water; (i) a second acid in such that the second part of the precursor exhibits a pH in the range of from 1.5 to 5.5, preferably in the range of from 2 to 3; (ii) at least one metal salt in an amount in the range of from 1 to 40 wt.-%, preferably in the range of from 5 to 20 wt.-%, relative to the total weight of the solid contents of the second part of the precursor; (iii) at least one rheology modifier compound in an amount in the range of from 0,1 to 30 wt.-%, preferably in from 2 to 20 wt.-%, relative to the total weight of the solid contents of the second part of the precursor; (iv) water;