Q:
Does Clairol Born Blonde Ultra Blue work on already blonde hair? Will it make my hair bleach-blonde? How long should I leave it on? (It’s a box bleach.)
A:
Box bleach can be unpredictable — especially on hair that’s already light. These kits are designed for general use, not customized color correction, so results vary widely. On pre-lightened hair, the formula can easily push your color too far, creating uneven tones or over-processed, brittle ends.
If your hair is already blonde, there’s little pigment left to lift. Adding more bleach won’t make it “blonder” — it will just strip away structure and shine.
While saving money is understandable, it’s far safer to see a professional colorist, ideally one who comes highly recommended. Bring a clear photo of your desired shade and let them guide you. A good stylist will lift only the darker or brassy areas and tone strategically — not just apply bleach all over.
Overlapping bleach repeatedly can cause severe breakage, making it difficult to achieve the color you want until the damaged sections grow out.
If you do decide to proceed at home, follow the instructions precisely, never exceed the recommended processing time, and monitor your hair closely. But your best bet — for both safety and results — is professional care.
Pro Tip for Aftercare
Any time you bleach or lighten your hair, sealing in moisture is essential. After your stylist visit, use Sabino Moisture Block to protect your hair from dryness and frizz. Its waterproof formula locks in hydration and shine between shampoos — helping your freshly lightened hair stay soft, smooth, and resilient.