Not only the weather, i.e. the UV sunlight, moisture or fluctuations between heat and cold, have an influence on the adhesion; other factors play a role too. That is why we ask about the framework conditions in which the tape will be used when we are developing or refining it.
Is the temperature that the adhesive tape will be exposed to high or extremely low? Should it, for example, be able to handle the 160° C of a hot drying tunnel in a car manufacturer's painting hall without suffering any damage? How long should the adhesive tape be exposed to these conditions? Should it hold parts of the elements of a high-rise façade safely in place during an earthquake – and also do this in 20 years' time?
Or could it be that something will constantly rub against the adhesive tape, for example, the wrapped cable in the engine area of a car? Could it be exposed to chemicals? Can the adhesive tape come into contact with oil or acids without incurring any damage? Only after we have answered all the questions do we combine the adhesive and the backing with the properties best suited for the respective purpose.