OLAPLEX No.7 Bonding Oil Review: Why It’s Mostly Silicone, Who It Suits & Honest Drawbacks
· Amazed by MN
OLAPLEX No.7 Bonding Oil is a tiny, expensive bottle with a big reputation for shine and smoothness. Despite the name, it is not a plant oil in the traditional sense: silicones make up most of the formula. That is not a bad thing, but it is important to know what you are buying. Here is what is inside, how to use it, and who it suits.
How we put this guide together: this review is based on OLAPLEX’s official product information, published ingredient lists, and independent research. No brand paid for this placement. Last updated: September 2026.
Quick Verdict
A lightweight, concentrated styling oil that adds shine, smooths frizz and flyaways, and protects from heat. Excellent at making hair look glossy with very little product. Pricey per milliliter, silicone-based, and some versions contain fragrance.
Why It’s Mostly Silicone
The first ingredients are dimethicone, isohexadecane, C13-14 isoparaffin, coco-caprylate, and phenyl trimethicone. Dimethicone and phenyl trimethicone are silicones. They coat the hair to create slip, shine, and frizz resistance, and they are the main reason this "oil" feels so light compared to heavy plant oils.
The plant oils the brand highlights, such as sunflower, pomegranate seed, corn, and green tea seed oil ferment, appear further down the list.
The Bond-Building Ingredient
Like every OLAPLEX product, No.7 contains bis-aminopropyl diglycol dimaleate, the brand’s patented ingredient, which OLAPLEX says is designed to relink broken disulfide bonds in damaged hair.
Check the Fragrance
The ingredient list on OLAPLEX’s Canadian website includes fragrance and several fragrance allergens (such as hexyl cinnamal, limonene, and linalool). Another retailer’s list we found did not include them. This suggests there are different versions on the market. If you are sensitive to fragrance, check the label on your bottle.
What OLAPLEX Claims
Compared with bleached hair without the oil, OLAPLEX reports up to 125% more shine, a 77% reduction in breakage, frizz control for up to 72 hours, and heat protection up to 450°F (232°C). These are brand-reported results. Note that one retailer listing we found states 25% rather than 125% more shine, so the figure is inconsistent across sources.
How to Use It
- Turn the bottle upside down and tap the bottom with your finger to release a drop.
- Short or fine hair: 1 to 2 drops. Mid-length: 2 to 3 drops. Long or thick hair: 3 or more.
- Apply to damp or dry hair, mostly on mid-lengths and ends, and style as desired.
- Use it before heat styling for protection, or after styling for extra shine.
Who It’s Best For
- Dull, frizzy, or heat-styled hair that needs shine
- Bleached or colored hair that feels rough
- People with fine hair who find traditional oils too greasy
Honest Drawbacks
- Expensive for the size. The standard bottle is small (30 ml / 1 fl oz).
- Silicone-based. Great for smoothness, but not for anyone avoiding silicones. Silicones can build up, so a clarifying wash now and then helps.
- Fragrance in some versions. Not ideal for fragrance-sensitive people.
- It is not a repair treatment. It improves how hair looks and feels. Real damage still needs time, gentle care, and trims.
How It Compares
If you want frizz control on damp hair before blow-drying, the OLAPLEX No.6 Bond Smoother is designed for that step. For a pre-styling primer with heat protection, compare it with the Bumble and bumble Hairdresser’s Invisible Oil Primer. For long-lasting humidity resistance, Color Wow Dream Coat is another popular option.
Frequently Asked Questions
How many drops of OLAPLEX No.7 should I use? OLAPLEX suggests 1 to 2 drops for short or fine hair, 2 to 3 for mid-length hair, and 3 or more for long or thick hair.
Can I use OLAPLEX No.7 on wet hair? Yes. The brand says it works on wet, damp, or dry hair.
Does OLAPLEX No.7 contain silicone? Yes. Dimethicone is the first ingredient, and phenyl trimethicone is also included.
The Bottom Line
OLAPLEX No.7 Bonding Oil is a very effective shine and smoothing product that goes a long way in small drops. Just know that you are paying for a silicone-based finishing oil with a bond-building ingredient, not a pure plant oil.
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