A dashpot for damping a closing movement of a closure system having a support and a closure member that are hingedly connected to each other, the dashpot comprising: - a cylinder barrel having a longitudinal direction, said cylinder barrel being made of a polymeric material; - a closed cylinder cavity formed within the cylinder barrel and being filled with a volume of hydraulic fluid, the cylinder cavity being formed partially by a cylindrical wall portion of the cylinder barrel; - a piston within said cylinder barrel so as to divide the closed cylinder cavity into a high pressure compartment and a low pressure compartment, the piston being slideable with respect to the cylinder barrel between two extreme positions in said longitudinal direction, the cylindrical wall portion having an inner sliding area along which the piston slides when moving between its two extreme positions; - a damper shaft which is rotatably mounted on the cylinder barrel and operatively coupled to the piston; - a motion converting mechanism for converting a rotational motion of the damper shaft in a sliding motion of the piston; and - a one-way valve allowing fluid flow from the low pressure compartment to the high pressure compartment when said closure member is being opened, wherein a clearance is formed between said sliding area and a circumferential part of the piston, characterised in that said clearance is sealed by means of at least one elastic seal provided around said circumferential part of the piston, and in that the dashpot further comprises: - at least one restricted fluid passage between the high pressure compartment and the low pressure compartment which is formed by a valve seat and a valve member separated by, at a predetermined temperature, a predetermined cross sectional area which determines a closing speed of the closure member; and - a temperature compensation system comprising a first part which forms the valve seat and the valve member, the first part being made of a first material having a first thermal expansion coefficient and the valve member being made of a second material having a second thermal expansion coefficient, the second thermal expansion coefficient being larger than the first thermal expansion coefficient so that said predetermined cross sectional area is decreased when said temperature is raised and vice versa so that said predetermined narrowest cross sectional area is increased when said temperature is lowered. - a cylinder barrel having a longitudinal direction, said cylinder barrel being made of a polymeric material; - a closed cylinder cavity formed within the cylinder barrel and being filled with a volume of hydraulic fluid, the cylinder cavity being formed partially by a cylindrical wall portion of the cylinder barrel; - a piston within said cylinder barrel so as to divide the closed cylinder cavity into a high pressure compartment and a low pressure compartment, the piston being slideable with respect to the cylinder barrel between two extreme positions in said longitudinal direction, the cylindrical wall portion having an inner sliding area along which the piston slides when moving between its two extreme positions; - a damper shaft which is rotatably mounted on the cylinder barrel and operatively coupled to the piston; - a motion converting mechanism for converting a rotational motion of the damper shaft in a sliding motion of the piston; and - a one-way valve allowing fluid flow from the low pressure compartment to the high pressure compartment when said closure member is being opened, wherein a clearance is formed between said sliding area and a circumferential part of the piston, characterised in that said clearance is sealed by means of at least one elastic seal provided around said circumferential part of the piston, and in that the dashpot further comprises: - at least one restricted fluid passage between the high pressure compartment and the low pressure compartment which is formed by a valve seat and a valve member separated by, at a predetermined temperature, a predetermined cross sectional area which determines a closing speed of the closure member; and - a temperature compensation system comprising a first part which forms the valve seat and the valve member, the first part being made of a first material having a first thermal expansion coefficient and the valve member being made of a second material having a second thermal expansion coefficient, the second thermal expansion coefficient being larger than the first thermal expansion coefficient so that said predetermined cross sectional area is decreased when said temperature is raised and vice versa so that said predetermined narrowest cross sectional area is increased when said temperature is lowered. - at least one restricted fluid passage between the high pressure compartment and the low pressure compartment which is formed by a valve seat and a valve member separated by, at a predetermined temperature, a predetermined cross sectional area which determines a closing speed of the closure member; and - a temperature compensation system comprising a first part which forms the valve seat and the valve member, the first part being made of a first material having a first thermal expansion coefficient and the valve member being made of a second material having a second thermal expansion coefficient, the second thermal expansion coefficient being larger than the first thermal expansion coefficient so that said predetermined cross sectional area is decreased when said temperature is raised and vice versa so that said predetermined narrowest cross sectional area is increased when said temperature is lowered.