Whether you love to DIY regular manis at home with your nail polish collection or you take frequent trips to the salon to get gel or acrylic nails, you’re bound to deal with inevitable annoyances. No matter how skilled you are with a brush or careful you are after the fact, nail polish can chip, ruining your pristine manicure. And while gel and acrylic nails stay looking stunning and chip-free for longer, they can take a toll on the strength of your natural nails. That’s where builder gel comes in. Builder gel, also known as builder in a bottle or BIAB, is a special type of gel nail polish that has gained popularity in recent years. If you’re working on strengthening and growing out your natural nails, or you are craving an elaborate nail art look involving molds or tips, builder gel might be a good fit for you. With the help of Eunice Park, research and development manager at Aprés Nail, we’re breaking down what you need to know about builder gel. Ahead, find out what it is, how to apply it, how to remove it and more.