Sun, Sweat, and SPF: How to Reset Your Scalp with Olaplex No.4C

Summer is prime time for buildup, and your scalp feels it first. Sweat, SPF, saltwater, chlorine, and extra styling products all pile up, leaving your scalp congested and your strands dull, dry, or greasy. Add in the effects of heat, humidity, and hard water, and suddenly your usual hair routine just isn’t cutting it. This kind of buildup doesn’t just weigh your hair down—it also blocks essential moisture and nutrients from penetrating, making your favorite products less effective. If your hair feels heavy, flat, or irritated, it’s time to hit reset with a clarifying shampoo.

Enter OLAPLEX No.4C Bond Maintenance Clarifying Shampoo, a high-performance favorite that delivers a deep detox without compromising hair health. Powered by Olaplex’s exclusive broad-spectrum clarifying system, this formula removes hard water minerals, chlorine, excess oil, and product residue in a single use. Unlike traditional clarifiers that can strip or dry out your hair, No.4C is infused with OLAPLEX Bond-Building Technology™, which strengthens and maintains your hair’s internal structure. The result? Softer, shinier, more vibrant strands—and a scalp that feels fresh, balanced, and ready for whatever summer throws your way.