Permeability of a space means the ratio of the volume within that space which is assumed to be occupied by water to the total volume of that space.
durability means the ability of components and systems to last so that the environmental performance can still be met after a mileage set out in paragraph 2.4. and so that vehicle functional safety is ensured, if the vehicle is used under normal or intended circumstances and serviced in accordance with the manufacturer’s recommendations.
Waterproofer means a product designed and labeled exclusively to repel water from fabric or leather substrates. Waterproofer does not include fabric protectants.
Turbidity means the cloudy condition of water due to the presence of extremely fine particulate materials in suspension that interfere with the passage of light.
Stability (7) means the standard deviation (1 sigma) of the variation of a particular parameter from its calibrated value measured under stable temperature conditions. This can be expressed as a function of time.