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 and being made of a metal; - 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; - a one-way valve allowing fluid flow from the low pressure compartment to the high pressure compartment when said closure member is being opened; - at least one restricted fluid passage between the high pressure compartment and the low pressure compartment, the restricted fluid passage being formed by a clearance between said sliding area and a circumferential part of the piston, said clearance having, at a predetermined temperature, a predetermined narrowest cross sectional area to determine a closing speed of the closure member; and - a temperature compensation system comprising a first part and a second part which cooperate with one another to form said restricted fluid passage, a first part being made of a first material having a first thermal expansion coefficient and a second part 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 cross sectional area is decreased when said temperature is raised and vice versa so that said cross sectional area is increased when said temperature is lowered, wherein the first part is formed by the cylindrical wall portion and the second part is formed by the piston, characterised in that the piston comprises a base and an outer cover layer, the base being made of a glass fibre reinforced polymeric material, the outer cover layer forming said circumferential part and being made of a polymeric material which is less abrasive towards said metal than said glass fibre reinforced polymeric material is towards said metal. - a cylinder barrel having a longitudinal direction and being made of a metal; - 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; - a one-way valve allowing fluid flow from the low pressure compartment to the high pressure compartment when said closure member is being opened; - at least one restricted fluid passage between the high pressure compartment and the low pressure compartment, the restricted fluid passage being formed by a clearance between said sliding area and a circumferential part of the piston, said clearance having, at a predetermined temperature, a predetermined narrowest cross sectional area to determine a closing speed of the closure member; and - a temperature compensation system comprising a first part and a second part which cooperate with one another to form said restricted fluid passage, a first part being made of a first material having a first thermal expansion coefficient and a second part 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 cross sectional area is decreased when said temperature is raised and vice versa so that said cross sectional area is increased when said temperature is lowered, wherein the first part is formed by the cylindrical wall portion and the second part is formed by the piston,