The Best At-Home Gel Manicure Kits for Long-Lasting Polish: Manucurist Green Flash Super Starter Kit. Manucurist Paris's plant-based gel formulas are designed to stay put for up to 10 days straight, but can also be removed in a minute flat. And since you can choose up to five polish shades to include in your set, you can change your nail color almost as often as you change clothes.