SONTOB Strength | Builder Gels

Build with confidence using SONTOB Strength Builder Gels. Our premium Korean formulas are designed for nail extensions, overlays, and reinforcements that combine strength with flexibility. Available in clear, pink, and natural cover shades, SONTOB Strength delivers a smooth application and flawless curing under UV/LED light. Resistant to chips and cracks, these builder gels allow you to sculpt professional-quality nails with ease. Inspired by Korean salon standards, SONTOB Strength offers durability without sacrificing elegance. Whether you’re creating long extensions or strengthening natural nails, SONTOB Strength ensures lasting beauty and premium performance.