A lid suitable for closing a metal can, wherein the lid comprises a metal ring to which a peelable membrane is sealed, wherein the metal ring comprises: - an outer annular part adapted to be fastened to an edge of the lateral wall of a can body, and - an inner annular part, to which said peelable membrane is sealed, wherein the inner annular part includes a crown part extended by a curl delimiting a central aperture, wherein the crown part includes: - an upper annular face to which said peelable membrane is sealed by means of a sealing strip made of a heat-seal material, and - a lower annular face, opposed to said upper annular face, wherein the curl is formed on the side of the lower annular face of said crown part, wherein the curl includes: - an outer surface and an inner surface extending in continuation of the upper and lower annular faces of said crown part, and - a free edge arranged within said curl, wherein the outer surface of said curl includes a first connection portion that is arranged opposite and near a second connection portion of said inner annular part, delimiting an annular space between each other, characterized in that the outer surface and the inner surface of said curl are covered with a heat-seal material, and in that said first connection portion and said second connection portion are sealed to each other by means of said heat-seal material, to form a sealing gasket closing said annular space. wherein the metal ring comprises: - an outer annular part adapted to be fastened to an edge of the lateral wall of a can body, and - an inner annular part, to which said peelable membrane is sealed, - an outer annular part adapted to be fastened to an edge of the lateral wall of a can body, and - an inner annular part, to which said peelable membrane is sealed, wherein the inner annular part includes a crown part extended by a curl delimiting a central aperture, wherein the crown part includes: - an upper annular face to which said peelable membrane is sealed by means of a sealing strip made of a heat-seal material, and - a lower annular face, opposed to said upper annular face, - an upper annular face to which said peelable membrane is sealed by means of a sealing strip made of a heat-seal material, and - a lower annular face, opposed to said upper annular face, wherein the curl is formed on the side of the lower annular face of said crown part, wherein the curl includes: - an outer surface and an inner surface extending in continuation of the upper and lower annular faces of said crown part, and - a free edge arranged within said curl, - an outer surface and an inner surface extending in continuation of the upper and lower annular faces of said crown part, and - a free edge arranged within said curl, wherein the outer surface of said curl includes a first connection portion that is arranged opposite and near a second connection portion of said inner annular part, delimiting an annular space between each other, characterized in that the outer surface and the inner surface of said curl are covered with a heat-seal material, and in that said first connection portion and said second connection portion are sealed to each other by means of said heat-seal material, to form a sealing gasket closing said annular space.