Pressure-sensitive adhesive strip

A pressure-sensitive adhesive strip comprising:

• inner layer F comprising a non-extensible film carrier, a first surface, and a second surface;
• layer SK1 comprising a first self-adhesive composition disposed on the first surface;
• and
• layer SK2 comprising a second self-adhesive composition disposed on the second surface,
• wherein:
• the first self-adhesive composition is based on a first vinylaromatic block copolymer composition foamed with a first plurality of microballoons;
• the second self-adhesive composition is based on a second vinylaromatic block copolymer composition foamed with a second plurality of microballoons;
• the first plurality of microballoons forms a first plurality of voids having a first mean diameter of 20 to 60 μm;
• the second plurality of microballoons forms a second plurality of voids having a second mean diameter of 20 to 60 μm;
• and
• inner layer F has a tensile strength in a longitudinal direction of greater than 100 N/mm2 and/or a tensile strength in a transverse direction of greater than 100 N/mm2.