👉 Vaportight, also known as vapor tightness or pressure tightness, is a property that describes how much energy (pressure) an object can withstand before it begins to leak. This means that the material must be able to withstand the amount of pressure needed to create a vacuum within its structure. For instance, in a gas cylinder, if you put a valve on top of it and fill it with liquid nitrogen, the valve will need to be sealed tightly because there is not enough pressure inside
