How long will the stickers stay on? You may choose different base coat and top coat depending on how long you wish the stickers to stay on. 1-3 days: peel off nail polish recommended 4-14 days: ordinary nail polish recommended 7-30 days: gel with UV light recommended Is it necessary to apply base coat and top coat? Yes. In order to have desired looks and duration, base coat and top coat are recommended. Please note: a. Do no apply the stickers until the base coat dries. b. Put on top gel or top coat to increase the lasting time. c. Apply topcoat to fill up the gaps between the bottom of gems and nails so that the gems will stay for a longer time.