The Brush On Builder X Starter Kit is the perfect introduction to structured, long-lasting gel nails. This essential kit includes a Base Gel, Top Gel, and our Brush On Builder X—designed to deliver strength, flexibility, and a flawless finish with effortless application. Ideal for overlays, natural nail reinforcement, and subtle extensions, this trio creates a smooth, durable foundation while maintaining a lightweight feel. Perfect for both professionals and at-home users looking to elevate their gel routine with salon-quality results. Brush On Builder X combines the strength and durability of our Builder X Sculpting Gel with a more convenient brush-on application. Housed in a gel bottle packaging, this formula is slightly thinner than its jar counterpart, making it easier to apply with a brush while maintaining all the same benefits. Brush On Builder X is perfect for strengthening natural nails or creating long-lasting extensions. It provides the same strong structure, self-leveling formula, and reduced heat spike during curing, now with the added convenience of a brush-on applicator for smoother, more precise application. Available in Clear Compatible with our gel polish and other products in the Sculpting Gel System for seamless use Same strong, self-leveling, flexible and durable formula as Builder X Sculpting Gel, now in a brush-on gel for easy application Thinner consistency for smooth, precise application while maintaining strength and durability Provides reduced heat spike during curing for greater comfort Perfect for overlays (natural nail strengthening), sculpting and building short or medium length nail extensions Size: 15 mL (0.50 fl.oz)