CLOSURE AND MANUFACTURING METHOD OF CLOSURE

To provide a closure less likely to leak gas and water immersion.SOLUTION: The closure is provided with an airtight member or watertight member 17 applied to at least a part of the joint surface between the components that form the closure. The airtight member or watertight member 17 has a first layer that is in contact with the closure and a second layer that is in contact with the atmosphere. The first airtight material or watertight material applied when forming the first layer has the viscosity before curing is lower than that of the second airtight material or watertight material applied when forming the second layer. The second airtight material or watertight material applied when forming the second layer has elasticity after curing.SELECTED DRAWING: Figure 1 【課題】ガス漏洩および浸水が発生しにくいクロージャを提供する。【解決手段】クロージャを構成する部品間の接合面の少なくとも一部に塗布された気密部材または水密部材１７を備え、気密部材または水密部材１７は、クロージャに接する第１層と大気に接する第２層を有し、第１層を形成する際に塗布する第１の気密性材料または水密性材料は、第２層を形成する際に塗布する第２の気密性材料または水密性材料よりも硬化前の粘性が低く、第２層を形成する際に塗布する第２の気密性材料または水密性材料は、硬化後に弾性を有する。【選択図】図１