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Highlights
Summary
Discover Full Rescue Densifying Leave-In Spray for Thin Hair, infused and micro-dosed with steam-distilled rosemary oil and triple-purified niacinamide. This leave-in thickens hair without sacrificing softness or movement. Hair looks and feels fuller and detangled with controlled flyaways.
Benefits
- Instantly thickens the look and feel of hair
- Controls flyaways
- Detangles hair for easy styling
- Creates a fuller look and feel
- Softens hair
- Hair feels silky soft after one use
Key Ingredients
- Bio-based Rosemary Oil (steam-distilled):
- Fortifies at the root
- Invigorates strands to prevent hair fall due to mechanical stress
- Niacinamide (triple-purified):
- Supports a healthy skin barrier by balancing the scalp
- Protects from oxidative stress caused by external aggressors
Research Results
- Hair looks and feels fuller
- Hair feels silky soft after one use*
- *consumer test after application of Full Rescue Shampoo, Conditioner, and Densifying Leave-In Spray
Item 2637948
For a fuller look, spray from root to tip on wet hair. Leave in and style as desired. Controls flyaways and detangles for easier styling.
Aqua / Water / Eau, Alcohol Denat., Pvp, Peg-40 Hydrogenated Castor Oil, Triethanolamine, Propylene Glycol, Phenoxyethanol, Parfum / Fragrance, Acrylates/Beheneth-25 Methacrylate Copolymer, Caprylyl Glycol, Biotin, Limonene, Niacinamide, Rosmarinus Officinalis Leaf Oil / Rosemary Leaf Oil, Hexyl Cinnamal, Coumarin, Benzyl Alcohol, Zinc Pca, Safflower Glucoside, Linalool, Amyl Cinnamal, Geraniol, Isoeugenol, Alpha-Isomethyl Ionone, Hydroxycitronellal, Benzyl Benzoate, Cinnamyl Alcohol, Citronellol, Tocopherol, Sodium Citrate
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Reviews
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by PowerReviews
Ratings Distribution
Hair Type
Most Helpful Positive Review
I am in love with this product
I received this product in exchange for my honest review. The Biolage Full Rescue Densifying Leave-In Spray really impressed me with its quality. The formula feels lightweight yet effective—it doesn't leave any sticky or greasy residue, which is a huge win for my fine, thin hair. The packaging is s...
Most Helpful Critical Review
Interesting Scent
[I received this product in exchange for my honest review] I have always loved this brand, and have purchased products by them many times in the past few years, so I was excited to try this leave in conditioner. My hair is wavy, and at the time I first tried the product, my hair was very dry from no...
459 results
Lightweight, Strengthening, and Actually Works!
Hair Type Wavy Hair
I received this product in exchange for my honest review. I've been using the Full Rescue Densifying Leave-In Spray once a week for about 6–7 weeks, and I've had a great experience. It's lightweight, non-greasy, and super easy to use I spray it on damp hair after washing and let it air dry or style as usual. After consistent use, I noticed my hair feeling stronger and looking fuller, especially near the roots. It's helped reduce shedding, and I've also seen a visible difference in frizz control and softness. It gives my hair a healthy feel without weighing it down, which is huge for me. Plus, it smells clean and fresh like a salon product. This spray really works well as part of the Full Rescue line, but even on its own, it adds noticeable strength and softness. I'd definitely buy it again.


Soft Hair, But Not Really Densifying
Hair Type Wavy Hair
[I received this product in exchange for my honest review] This one wasn't my favorite. While it made my hair soft and shiny, the rosemary oil scent was overpowering and made my hair smell a bit oily instead of fresh. I also didn't notice much "densifying" effect.

Great for scalp health
Hair Type Wavy Hair
[I received this product in exchange for my honest review] I loved this leave in spray. After washing and conditioning, I spray this at my roots and use a more moisturizing product on my ends. However, I've noticed that this has really transformed my scalp health. My hair feels healthier at the root and I appreciate the sensation from this spray. It's slightly cooling,

Love this line of products!
Hair Type Straight Hair
[I received this product in exchange for my honest review] I have thinning, straight, fine hair. Shoulder length. It is dull and lifeless. This line makes it feel full and voluminous. I even use this spray when I don't use the shampoo and still love the results. Definitely one of the best hair products I've found!
New fave!
Hair Type Very Curly Hair
I received this product in exchange for my honest review I love Biolage and it's typically because of their scent. I love that it has Rosemary oil & Niacinamide this concentrate really gives my hair that extra boost. I have a lot of breakage and lost of hair loss. This helps me keep my hair as balance as possible.
