Ageing resistance is the degree of reliable performance of the tape over time, under certain conditions. Depending on the adhesive system being used, adhesive tapes are often usable for permanent applications. This permanence is reflected by the resistance of the adhesive against ozone (O3), oxygen (O2), UV light, temperature, humidity, water and different kinds of chemicals. Generally acrylic adhesives are much better suited to withstand these environmental influences than rubber adhesives and can maintain their permanent, reliable functionality over many years.