The invention provides a 100 % anhydrous sunscreen composition and a use of this sunscreen composition with very high water and sweat resistance properties which can be applied on a wet skin, either in the presence of water by repelling water or water droplets respectively or in under-water conditions. The present invention describes the use of a sunscreen composition with SPF >;=50 or 50 or 30 or <;30 or according to any Sun Protection Factor that conforms to any current cosmetic legislation (eg. EU, USA, Japan) consisting of a silicone organic elastomer blend comprising Dimethicone/Bis-isobutyl PPG-20 Crosspolymer in Isododecane in a concentration range from about 30% to about 90% w/w and a silicone elastomer comprising Dimethicone/Vinyl Dimethicone Crosspolymer and Silica in a concentration range from about 0,1% to about 10% w/w, wherein the sunscreen is applied on the skin in the presence of water (in wet and/or under-water conditions). Further, the new sunscreen product allows the consumer to enter water directly after the application of the sunscreen product on his dry or already wet skin.