Use of a two-component polyurethane-based adhesive composition having a shear strength measured according to the ISO 4587 standard which is greater than 10 MPa over the entire temperature range from -170°C to +40°C, in which the polyurethane-based adhesive composition is located between a flexible membrane and a rigid membrane in order to form a multilayer structure, and in which the multilayer structure represents the secondary sealing barrier of a tank integrated into a load-bearing structure, of a hull of a ship intended for transporting liquefied gas by sea; and in which the adhesive composition is obtained by reaction between a part A known as resin and a part B known as hardener; part A being represented by the mixture comprising the ingredients: a) at least one polyol chosen from polyether polyols, polyester polyols, unsaturated polyols, hydroxyl-terminated thermoplastic polyurethane prepolymers, each of the components a1 to a4 having an average molecular weight between 200 and 9000 g/mol and an OH functionality between 2 and 4.6; the polyol representing from 20 to 60% by weight of part A; b) at least one consistency agent chosen from the group of primary or secondary amines or polyamines; the consistency agent representing from 0.4 to 3% by weight of part A; c) optionally a chain extender chosen from the group of C 2 to C 10 diols; the chain extender representing from 0 to 10% by weight of part A; d) inorganic fillers; representing from 22 to 70% by weight of part A; e) at least one additive chosen from the group of wetting agents, anti-foaming agents, dispersants, colorants, thickening agents and fluidifying agents; representing from 2 to 6% by weight of part A; f) optionally a thermally-initiated crosslinking catalyst; representing from 0 to 0.05% by weight of part A; part B being represented by the composition comprising the ingredients: g)at least one NCO-terminated polyurethane prepolymer having an average molecular weight between 840 and 2100 g/mol and an NCO functionality between 2 and 4; representing from 75 to 100% by weight of part B; h)optionally inorganic fillers, representing from 0 to 20% by weight of part B; i)optionally at least one additive chosen from the group of thickening agents and fluidifying agents, representing from 0 to 5% by weight of part B; and the ratio of the NCO functional groups (meq/g) of part B to the sum of the reactive OH (meq/g) and NH (meq/g) functional groups of part A ranging from 0.90 to 1.10. a) at least one polyol chosen from polyether polyols, polyester polyols, unsaturated polyols, hydroxyl-terminated thermoplastic polyurethane prepolymers, each of the components a1 to a4 having an average molecular weight between 200 and 9000 g/mol and an OH functionality between 2 and 4.6; the polyol representing from 20 to 60% by weight of part A; b) at least one consistency agent chosen from the group of primary or secondary amines or polyamines; the consistency agent representing from 0.4 to 3% by weight of part A; c) optionally a chain extender chosen from the group of C 2 to C 10 diols; the chain extender representing from 0 to 10% by weight of part A; d) inorganic fillers; representing from 22 to 70% by weight of part A; e) at least one additive chosen from the group of wetting agents, anti-foaming agents, dispersants, colorants, thickening agents and fluidifying agents; representing from 2 to 6% by weight of part A; f) optionally a thermally-initiated crosslinking catalyst; representing from 0 to 0.05% by weight of part A; g)at least one NCO-terminated polyurethane prepolymer having an average molecular weight between 840 and 2100 g/mol and an NCO functionality between 2 and 4; representing from 75 to 100% by weight of part B; h)optionally inorganic fillers, representing from 0 to 20% by weight of part B; i)optionally at least one additive chosen from the group of thickening agents and fluidifying agents, representing from 0 to 5% by weight of part B; and the ratio of the NCO functional groups (meq/g) of part B to the sum of the reactive OH (meq/g) and NH (meq/g) functional groups of part A ranging from 0.90 to 1.10.