Redken Extreme Length Biotin Leave-In Conditioner For Longer Hair – Promotes Healthy Hair Growth, Strengthens Damaged Hair, Seals Split Ends, Infused With Biotin
Condition: New
Buy Now, Pay Later
As low as
$8
/ mo
Learn more
- – 4-month term
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Monday, Mar 9
Recently Viewed
Size: 5.1 Fl Oz (Pack of 1)
Features
- Redken Extreme Length Sealer Leave-In Treatment gently smoothes the hair cuticle to help prevent hair breakage and fortify damaged hair. Formulated with Redken's Strength Complex and acts as a deep conditioner.
- Leaves hair healthy, shiny and resilient. Reduces friction from brushing and preventing further damage. Contains Biotin and Soy Protein to strengthen strands and repair split ends.
- Fortifying deep conditioner for dry damaged hair treats the root, core and tip of the hair. Extreme Length Conditioner is formulated with Redken's Length Care Complex. Supports hair growth.
- Strengthens damaged hair, leaving it healthy and resilient. Manages and treats damaged hair. Hydrates, strengthens, and restores damaged hair. Prevents future hair breakage and reduces split ends.
- Formulated with Redken's Length Care Complex, which contains biotin and soy protein to help strengthen damaged, weak, and fragile hair. Helps hair grow longer and stronger. Adds manageability, smoothness and shine.
Description
Redken Extreme Length Leave In Conditioner with Redken's Length Care Complex made with Biotin and Soy Protein helps hair growth by strengthening damaged hair to grow longer and stronger. Extreme Length Leave In Conditioner also helps prevent breakage so your hair can keep growing longer. 81% less breakage when using the full Extreme Length system (shampoo, conditioner & treatment) 78% less visible split ends - Formulated with biotin and soy protein - Strengthens weak, fragile hair - Adds manageability, smoothness and shine. Brand Story Redken is the 1 professional brand in North America. Powered by science, prescribed by professionals, Redken creates products with the highest quality ingredients, delivering powerful hair transformations for all hair types.
Brand: Redken
Item Form: Liquid
Material Feature: Vegan
Hair Type: Damaged
Product Benefits: Biotin and soy protein infused leave in conditioner that helps hair growth for damaged hair
Is Discontinued By Manufacturer : No
Product Dimensions : 2.37 x 1.53 x 7.66 inches; 5.6 ounces
Item model number : P18507
UPC :
Manufacturer : Redken
Best Sellers Rank: #10,090 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #229 in Hair Conditioner
#229 in Hair Conditioner:
Customer Reviews: 4.6 4.6 out of 5 stars (5,285)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Mar 9
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Size: 5.1 Fl Oz (Pack of 1)
I've been trying to go the natural hair routine for 2 years since it seemed my hair has been struggling with length. I finally saw this product nd thought "why not" since seeking to find what is best for me has been a journey for all aspects of myself. Just to let you know I only use this product once a week. I will explain: My shower routine is that I exfoliate my scalp with a salt scrub, wash with shampoo and them use the REDKEN mask and message it into my scalp for the instructed time and then rinse off with cold water. Then I used the REDKEN leave on conditioner and let my hair air dry....and I would say these two products had made my hair feel more healthy then the all natural hair routine I've been using. Yes, maybe all natural works for some, but these two additions to my hair routine had relieved my hair of past issues ive been struggling with. It was always dry, and flaky the next day or when hours after a wash and I was trying to do less hair washes, but it was difficult due to how embarrassingly flaky and oily my hair got after one day. Adding the REDKEN Extreme Length Mask and leave in conditioner to my routine had allowed my hair to last a week till it showed signs of oiliness and flaking which lead me to believe I didn't have dandruff but my scalp was just overly dry from these so called natural hair products. REDKEN had helped in maintaining the moisture in my hair which helped my scalp from over producing oils that ended up making it look so greasy looking and flaky. I only use it once a week and in that week my hair feels silky, soft and healthy I feel like a model flipping my hair around its ridiculous! I have only used this product twice, as I said I've been only using it once a week. so I can't really say if it had helped my hair with growing more length. but i had done my share of research that states that when issues with hair not growing past a certain length it could be due to hair damage (or split end) causing the hair to break not along it to lengthen. If these products can maintain the moisture in my hair for a week, then I would confidently say that if I continue to use these products my hair strans will grow more stronger and hydrated that my ends will not be so easily broken. This is my theory after all on how this product line is intended to work. I will update this review if that is the case!
...
show more
Reviewed in the United States on April 13, 2023 by Emily Emily
Size: 5.1 Fl Oz (Pack of 1)
I have been trying to grow out my thick/frizzy/wavy-curly (depending on the weather) hair. Eons ago, I was dumb and cut my hair that was down to about my waist after college when I got a "professional" job. Big mistake. Anyways, been trying to grow it back out past my lower shoulders for years. So this came along at the same time as the pandemic. I wanted something to moisturize my hair without being heavy but also help with growth and general health of roots, etc. Fast forward, my hair is down to my waist. Key to this is, use products like this AND stop using the blow dryer to (like me) to straighten your hair. This stuff lasts a long time so don't let the small container fool you. You don't need a lot. Just take a little blob, rub it in your hands and spread it through your hair. Let it sit, and if you need to blow dry, just do a little bit at the roots. I would recommend those with long hair...flip your your hair over and blow dry bending over...just the roots though. As I mentioned before...you don't need a lot. I bought my first about 2+ years ago and I just recently ran out. Oh, another thing. If you are trying to grow your hair long and your hair is not too oily. forgo the daily washing. Go every other day or every 2-3 days so you don't strip your hair of the natural hair oils that protect it.
...
show more
Reviewed in the United States on January 31, 2026 by Selena
Size: 5.1 Fl Oz (Pack of 1)
Good product, smells nice
Reviewed in the United States on January 27, 2026 by Alax Kindle Customer
Size: 5.1 Fl Oz (Pack of 1)
Let me start with: I’m a big fan of Redken products. 35/F, my hair is 2.5ft long, and I’ve had long hair the majority of my life. This Extreme Length Leave-in is a godsend. I tried it a little over a year ago and it’s now part of my general hair care routine. After towel drying and combing my hair, I add this to the lengths of my hair, roughly my ears down to the ends, but definitely caring for the ends the most. It’s lightweight enough to not be heavy while adding adequate moisture, and tames any shredded dead ends. No added shine (though Redken does make a good shine spray, but that’s for another review ;) ) Redken can be a bit expensive but they provide a very good product. I have this particular one on subscription because it’s a better value to just have it show up on schedule (with the ability to adjust arrival) than having to order or go to Ulta. The price for Sub&Save is helpful too.
...
show more
Reviewed in the United States on November 19, 2025 by Hachi Hachi
Size: 5.1 Fl Oz (Pack of 1)
I’ve tried so many leave-in conditioners for my curls, but this Redken one is hands down a favorite in my daily curl combo. From the first use, my hair felt softer, more defined, and way easier to detangle. No crunchiness or greasy residue—just bouncy, moisturized curls/waves that actually behave! (Minus frizz.. I live in Florida, HUMIDTY ) It has a light, pleasant scent that isn’t overpowering, and a little goes a long way. I use it right after washing while my hair’s still damp. Pros: - Hydrates and softens curls - Defines without weighing down - Light, fresh scent - Great for detangling - Doesn’t leave buildup Cons: – A bit pricey, but worth it for the results – Not Frizz Free If you’ve got curls that need some extra love, this is absolutely worth a try. Redken nailed it!
...
show more
Reviewed in the United States on July 8, 2025 by Bella Bella
Size: 5.1 Fl Oz (Pack of 1)
Holy grail! I love this product, excellent for breakage-prone/brittle ends. As a blonde I use it almost every day.
Reviewed in the United States on January 8, 2026 by Bella
Size: 5.1 Fl Oz (Pack of 1)
This leave in is very good. It makes your hair soft without a bunch of residue. I put it in concentrating on the ends of the hair and I have noticed I have fewer spit ends. I have not noticed it helping my hair grow however, but that was not my main concern. It does not make the hair greasy and it keeps it shiny and easy to manage
...
show more
Reviewed in the United States on August 11, 2025 by Cari B
Size: 5.1 Fl Oz (Pack of 1)
A must for my over-bleached blonde hair. This has really saved my hair. Normally my super dry ends are constantly breaking off, but using this, along with Moroccan oil, has improved my ability to grow my hair past my shoulders. Plus my hair feels soft and not dried out all the time. Add it to your kit!
...
show more
Reviewed in the United States on July 28, 2025 by Blondsungoddessh