SOS PRIMER UV SPF30 by Clarins . Make-up primer that enhances luminosity and protects. SPF30. The range of perfecting primers created to provide a color correction adapted to the needs of different skin tones. SOS Primer UV prepares the skin for makeup, improves its hold and instantly corrects, revives and brightens the complexion. Moisturizes the skin and acts as a barrier against UV rays. A primer that can also be used before other Clarins SOS Primer to correct the skin according to beauty needs.