Silicone pressure-sensitive adhesives are characterized by very good self-adhesive and functional properties. The first group includes: tack, adhesion and cohesion. No less important are the functional properties: maximum working temperature, shrinkage, resistance to external factors and yellowing. It is well known that silicone adhesives are materials for special applications due to their properties, namely surface tension, high UV transparency, good thermal stability, low intermolecular interactions or low surface tension. This paper attempts to investigate the influence of environmental conditions and PSA aging time on the most important functional and self-adhesive properties. This is an important aspect in terms of the use of this type of materials and their suitability for use. The tests were carried out after 1 h days and after a 6 month. To investigate the impact of environmental conditions samples (tapes and joints tapes with a steel substrate), they were conditioned in a climatic chamber simulating environmental conditions by 20 days.