You dyed your hair and the colour turned out wrong. Maybe it’s too dark, too brassy, or you’ve got years of colour build up that’s making your hair look flat and dull. You want to start fresh but you’re not ready to bleach or cut your hair off.
Colour B4 Hair Colour Remover offers a gentler alternative. This product works by shrinking artificial colour molecules so they wash out of your hair, bringing you closer to your natural shade without harsh bleaching agents. It’s available in different strengths and can be found at high street retailers and online shops across the UK.
This guide shows you exactly what Colour B4 is, how to decide if it suits your hair type, where to buy it at the best price, and the complete process for using it safely at home. You’ll also find real customer feedback to help you set realistic expectations before you purchase.
What is Colour B4 hair colour remover
Colour B4 hair colour remover is a UK-made product designed to remove artificial hair colour from your strands without using bleach or ammonia. The formula comes in different strength options to suit various hair types and colour depths. You can purchase it from high street retailers like Boots and Superdrug, as well as online through Amazon and specialist beauty shops.
How the formula works
The product uses a shrinking technology that reduces the size of artificial colour molecules trapped inside your hair shaft. Once these molecules shrink, they become small enough to rinse out with water during the removal process. This means you’re not stripping or lightening your natural pigment the way bleach does. Your hair returns closer to its base colour rather than being lifted to a lighter shade.
The key difference between Colour B4 and bleach is that it only targets artificial dye, leaving your natural melanin untouched.
Available strengths
You’ll find three main variants: Regular, Extra, and Ultimate. Regular works for lighter dye deposits and fewer colour applications. Extra suits medium to dark colours or multiple dye layers. Ultimate tackles the heaviest colour build-up and darkest shades, making it the strongest option in the range.
Step 1. Decide if Colour B4 suits your hair
Colour B4 hair colour remover only works on artificially coloured hair, so you need to check if your hair situation matches what the product can handle. The formula removes synthetic dye molecules but cannot reverse bleaching or chemical lightening. Before you buy, assess your current hair colour and how you got it.
When Colour B4 works best
The product delivers the strongest results when you’ve used permanent or semi-permanent dyes on naturally dark to medium hair. You’ll see good colour removal if you’ve built up layers of the same shade over months or years, creating an unnatural dark tone. Hair that’s been dyed black, dark brown, or deep red responds particularly well to the Extra or Ultimate strength options.
If you’ve only used temporary colour sprays or wash-in-wash-out dyes, Colour B4 may be too strong for your needs.
What won’t work with this product
Never expect Colour B4 to lighten hair you’ve bleached or highlighted. The product cannot restore previously lightened strands to their natural colour because bleach permanently removes melanin. Heat damage from straighteners above 230 degrees can also seal your hair cuticle so tightly that the colour remover can’t penetrate properly, leaving patchy results.
Your hair condition checklist
Check these points before purchasing:
- Your hair holds artificial dye (not natural pigment or bleached sections)
- You haven’t chemically lightened your hair in the past year
- Heat styling temperatures stay below 230 degrees regularly
- Your ends aren’t severely split or damaged beyond repair
Step 2. Compare prices and where to buy
Colour B4 hair colour remover sells across multiple UK retailers at varying prices. You’ll find the best deals by checking both online platforms and high street chemists before purchasing. A single box typically costs between £9 and £13 depending on the strength and where you shop.
Major retailers and current pricing
Amazon UK stocks all three strength variants with prices starting around £9.99 for the Regular version. The Extra and Ultimate strengths cost slightly more at approximately £11 to £13 per box. You’ll need to factor in whether you need one or two boxes based on your hair length.
High street shops like Boots and Superdrug sell the product at similar price points, usually ranging from £10 to £12.50. These stores often run promotions where you can save £2 to £3 off the standard price.
Shopping during sale periods can cut your costs by up to 25%, particularly during seasonal clearances.
Revolution Beauty and Savers also stock the product at competitive rates, making it worth checking multiple retailers before you commit to a purchase.
Step 3. Prepare and test before you start
Your preparation work determines whether the colour removal process succeeds or triggers a reaction. The instructions inside every Colour B4 hair colour remover box require you to complete an allergy test 48 hours before the full application. Skipping this step puts your scalp at risk, even if you’ve used similar products before without issues.
Complete the mandatory allergy test
Mix a small amount of the activator with the colour remover as shown in the instructions. Apply this mixture behind your ear or on your inner elbow using a cotton bud. Leave it untouched for 48 hours and check for redness, itching, or swelling during this period.
If you develop any reaction during the 48-hour test window, do not use the product on your full head.
Watch the test area carefully. Wash off the mixture immediately if you notice burning or severe irritation before the 48 hours end.
Gather your materials before starting
Collect these items before you open the box:
- Old towels that can be stained
- Plastic gloves (usually included in the kit)
- Cling film for wrapping long or thick hair
- Timer or phone alarm to track each step accurately
- Wide-tooth comb for sectioning and distributing product
- Old clothes you don’t mind getting colour remover on
Having everything within arm’s reach prevents you from rushing between rooms with product dripping from your hair. Set up your workspace in a warm bathroom because heat helps the formula work more effectively during the development time.
Step 4. Apply, rinse and care for your hair
The application stage demands precision and patience. You need to work through your hair methodically, ensuring every section receives full saturation with the colour b4 hair colour remover. Rushing this process leads to patchy colour removal and uneven results that force you to repeat the entire treatment.
Section and apply the product
Divide your dry, unwashed hair into four equal sections from front to back and ear to ear. Mix the activator and colour remover according to the box instructions immediately before use. Starting at the back underneath section, apply the mixture generously using your gloved hands or the applicator bottle. Work the product through from roots to ends until each section looks visibly wet and covered.
Long or thick hair requires two boxes to achieve proper saturation. Wrap your covered hair in cling film and keep the room warm during the 60-minute development time. Set your timer and leave the product to work without touching or checking underneath the film.
Complete the rinsing process
Rinse your hair under warm running water for a full 10 minutes without using shampoo. The water may run clear, but you must complete the entire rinsing duration. Apply the buffer solution, massage it through your hair for one minute, then rinse for another five minutes minimum.
Skipping any rinsing time allows dye molecules to reoxidise, which brings unwanted colour back into your hair within days.
Wait 15 minutes, then apply the remaining buffer and rinse immediately. This final rinse removes any residual product and prevents colour from creeping back.
After-care for best results
Your hair will feel dry immediately after treatment. Apply a deep conditioning mask and leave it on for 10 minutes before styling. Avoid washing your hair for 24 hours to let your cuticles close properly. Wait seven full days before applying any new permanent colour to prevent darker-than-expected results.
Final thoughts on Colour B4
Colour B4 hair colour remover offers a bleach-free solution for removing unwanted artificial colour from your hair. The process requires careful preparation and thorough rinsing to achieve even results without damaging your natural pigment. Purchase the strength that matches your colour build-up, complete the allergy test, and follow every rinsing step exactly as instructed.
Ready to explore new colour options once you’ve removed your old shade? Browse the full range of vegan, cruelty-free hair dyes at Smart Beauty Shop for your next transformation.
