10 Best Oil For Hair Extension 2025 in the United States

The Kerastase Elixir Ultime Refillable Hair Oil is a lightweight, liquid oil designed to hydrate and smooth hair, making it especially suitable for those with normal hair types and hair extensions. Its formula includes wild camellia oil, known for nourishing and strengthening hair, which helps reduce frizz while adding shine. The oil absorbs quickly, avoiding a heavy or greasy feel, which is great if you want a natural glossy look without weighing extensions down. The scent is a subtle camellia fragrance, pleasant but not overpowering. One standout feature is its refillable bottle made from recycled materials, which is a nice eco-friendly touch.

You apply just 1 or 2 pumps mainly to the mid-lengths and ends, perfect for keeping extensions healthy and strong without buildup at the roots. On the downside, the oil is targeted at normal hair and might not be as effective for very dry or damaged extensions needing deeper conditioning. Also, compared to thicker oils, this one is lighter, so if you prefer a richer feel, it might not fully satisfy that need.

This makes the Kerastase Elixir Ultime a strong option if you're seeking a nourishing, easy-to-use, and environmentally conscious hair oil that boosts shine and reduces frizz without heaviness. It works especially well for maintaining the health and appearance of hair extensions that are already in good condition.

OUAI Hair Oil is designed as a versatile solution for anyone looking to manage frizz and protect their hair from damage, especially those using hair extensions. One of its key strengths is its ability to provide heat protection up to 450°F (232°C), making it ideal for users who frequently style their hair with heat tools. The inclusion of nourishing ingredients like Ama oil and Baobab seed oil helps keep hair hydrated and adds shine, which can be beneficial for maintaining the look and health of hair extensions.

The oil has a pleasant Rue St. Honoré scent, which many users may find appealing. Its lightweight consistency allows for easy absorption without leaving a greasy residue, which is a common concern for those using hair oils. Additionally, the formula is free from harmful chemicals like parabens and sulfates, further indicating its suitability for various hair types, including normal, straight, wavy, curly, and textured hair.

There are a few drawbacks to consider. While the product effectively manages frizz and adds shine, some users may find that they need to use the oil sparingly, as too much can weigh hair down. Since it's marketed as a multitasker, it might not replace other specialized products for specific hair concerns. Also, although it aims to protect against color fading and UV damage, results can vary with different hair types and conditions.

Moroccanoil Treatment is a hair oil designed to condition and enhance the appearance of hair, including hair extensions. A major strength of this product is its use of Argan oil, known for its rich nourishing properties. This makes it suitable for all hair types, promoting hydration and shine while helping to smooth frizz and flyaways. The product's alcohol-free formulation is also a plus, as alcohol can strip moisture from hair, which is particularly important for maintaining the health of hair extensions.

In terms of consistency, the oil has a light liquid texture that absorbs well into the hair, preventing greasiness while providing a smooth finish. Users often appreciate the signature Moroccanoil scent, which adds a pleasant aroma to the hair without being overpowering.

One potential drawback is that while it boosts shine significantly, it may not provide enough hold for styles that require more structure. Additionally, the 3.4-ounce size might be limiting for regular users, especially if applying to longer hair extensions or for those who use it frequently. The price point could also be a consideration for budget-conscious consumers, as premium hair oils typically come at a higher cost.

For those looking to improve the health and appearance of their hair extensions, this treatment is a great option, but it may not suit everyone’s styling needs or budget.