*2.3. Durability Tests*

SLIPS were subjected to three types of tests to assess their durability in different aggressive environments.

UV irradiation tests were performed exposing the samples to a lamp (UVGL-58, UVP International, Jena, Germany) with a radiation intensity of 2.0 mW cm−<sup>2</sup> measured at λ = 354 nm. The samples were collected, and their wetting properties assessed after 2, 4, 6, and 8 h of irradiation.

Chemical ageing tests were performed by immersing SLIPS in three different aqueous solutions: acidic (pH = 3, obtained by dilution of 3.3 g·L−<sup>1</sup> of acetic acid, ≥99%, Merck), alkaline (pH = 11, obtained by dissolution of 0.04 g·L−<sup>1</sup> of sodium hydroxide, 99%, Merck), and saline (obtained by dissolution of 100 g·L−<sup>1</sup> of sodium chloride ≥99%, Merck). After fixed amounts of time, samples were withdrawn from the solutions, rinsed with deionized water, dried in air, and characterized in terms of wetting properties, then re-immersed in the solutions.

Abrasion tests were performed as per UNI EN 1096-2 standard, which is used to assess the mechanical properties of coated glasses in the building industry. Samples were fixed to a technical balance with double-sided adhesive tape and a rotating felt disk (diameter 60 mm, rotational speed 60 rpm) was pushed against the sample until a weight of about 400 g, equivalent to a force of about 4 N, was measured by the balance. The abrasion continued for 30 s, then the sample was removed, and its wetting properties re-evaluated.
