Pressure sensitive adhesive assembly suitable for bonding to uneven substrates

A method of applying a pressure sensitive adhesive assembly to a substrate provided with an uneven surface, which comprises the steps of:

• providing a pressure sensitive adhesive (PSA) assembly suitable for bonding to a substrate provided with an uneven surface, wherein the pressure sensitive adhesive (PSA) assembly comprises a polymeric foam layer comprising a polymeric base material, and having a complex viscosity comprised between 2,000 Pa·s to 80,000 Pa·s, when measured at 120° C. according to the test method described in the experimental section;
• subjecting the polymeric foam layer to a heating step;
• contacting the heated polymeric foam layer obtained in step a) to the uneven surface of the substrate;
• and
• allowing the polymeric foam layer to cool down on the substrate.