SILKELIDE is the result of a research study on a multi-active ingredient for cosmetic application: a chemical polymer used in ophthalmology surgery (Poloxamer 338 (and) PPG51/SMDI Copolymer). The tests performed, show that Silkelide can increase the SPF, in a sun protection formula, from about 30 to 70 %, depending on the formulation, the percentage of Silkelide and the type of emulsifier used. It is able also to form a light, elastic and silky film which protect skin from pollution, giving a very nice touch to the finished product. Used at a correct percentage, Silkelide is able to thick liquid emulsion, increasing the viscosity up to a fluid/creamy consistency, stabilizing the emulsion and acting like a co-emulsifier.