The water solubility is an important feature for the end of life, as it causes the product to soften and break-down in the environment over time into mineralised biomass, CO2 and water. Warm water soluble grades will break-down rapidly at temperatures above 40℃. These features of Hydropol make it a very useful material in its own right for certain applications, but would need to be combined with another more impervious material, if more resistance to water is required.