Composition comprising: - an -NCO component comprising: A) at least one polyurethane including at least two NCO end groups obtained by a polyaddition reaction: - of a composition comprising at least one diisocyanate, preferably at least one dissymmetric diisocyanate; and - of a composition comprising at least one polyol; B) at least one polyisocyanate comprising at least three isocyanate -NCO functions chosen from the group consisting of biurets, isocyanurates, adducts of diisocyanates and of triols, and mixtures thereof; - an -OH component comprising: - at least two polyols P1 each having a number-average molecular mass strictly less than 500 g/mol, determined according to the method identified in the description, said polyols P1 being such that: ∘ at least one polyol P1 comprises at least three hydroxyl functions, preferably at least four hydroxyl functions; and ∘ at least one polyol P1 comprises at least two hydroxyl functions; and - at least one polyol P2 having a number-average molecular mass strictly greater than 1000 g/mol, determined according to the method identified in the description, said composition comprising at least one rheological agent, the volume ratio of -OH component/-NCO component ranging from 1/3 to 3/1. - an -NCO component comprising: A) at least one polyurethane including at least two NCO end groups obtained by a polyaddition reaction: - of a composition comprising at least one diisocyanate, preferably at least one dissymmetric diisocyanate; and - of a composition comprising at least one polyol; B) at least one polyisocyanate comprising at least three isocyanate -NCO functions chosen from the group consisting of biurets, isocyanurates, adducts of diisocyanates and of triols, and mixtures thereof; A) at least one polyurethane including at least two NCO end groups obtained by a polyaddition reaction: - of a composition comprising at least one diisocyanate, preferably at least one dissymmetric diisocyanate; and - of a composition comprising at least one polyol; - of a composition comprising at least one diisocyanate, preferably at least one dissymmetric diisocyanate; and - of a composition comprising at least one polyol; B) at least one polyisocyanate comprising at least three isocyanate -NCO functions chosen from the group consisting of biurets, isocyanurates, adducts of diisocyanates and of triols, and mixtures thereof; - an -OH component comprising: - at least two polyols P1 each having a number-average molecular mass strictly less than 500 g/mol, determined according to the method identified in the description, said polyols P1 being such that: ∘ at least one polyol P1 comprises at least three hydroxyl functions, preferably at least four hydroxyl functions; and ∘ at least one polyol P1 comprises at least two hydroxyl functions; and ∘ at least one polyol P1 comprises at least three hydroxyl functions, preferably at least four hydroxyl functions; and ∘ at least one polyol P1 comprises at least two hydroxyl functions; and - at least one polyol P2 having a number-average molecular mass strictly greater than 1000 g/mol, determined according to the method identified in the description, said composition comprising at least one rheological agent, the volume ratio of -OH component/-NCO component ranging from 1/3 to 3/1.