Gelish Brush-On Builder is a professional-grade builder gel that streamlines extension services into one self-leveling, crystal-clear formula. This versatile product overlays natural nails for added strength, extends using forms or tips, and builds dimension with lightweight, long-lasting structure. The bubble-free formula cures in just 30 seconds under LED, eliminating the need for multiple pots, brushes, and lengthy cure times.The 15-Free, vegan formula is designed for life-proof length and strength, delivering over 21 days of chip-resistant wear. Fast-acting and soak-off, it creates a flawless canvas for nail art, encasements, and high-performance overlays. No sidewall flooding, no shaking required.How to Apply Dry prep nails, apply acid-free primer, and secure nail forms or clear tips. Build free edge with builder gel, flash cure 10 seconds, then overlay entire nail. Float a bead down the center, flash cure 10 seconds, remove forms, and cure 30 seconds. Cleanse, shape with buffer, apply sealer gel, cure 30 seconds, and cleanse again. Product Details Formula: 15-Free, Vegan, Cruelty-Free, TPO-Free System: Builder Gel Finish: Crystal Clear Wear: Professional, Longwear (21+ days)