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BioKap Rapid Permanent Hair Dye Natural Brown 4.0 135ml

BioKap Rapid Permanent Hair Dye Natural Brown 4.0 135ml
Price: £14.49 £12.49
Quantity

Brand BioKap
Product Type Hair Colour
Size 135ml

BioKap Rapid Permanent Hair Dye Natural Brown 4.0 is a permanent at-home hair colour designed to give a natural-looking brown result with fast development time. Ideal when you want reliable grey coverage without a lengthy wait, the colour works in just 10 minutes, making it a practical option for busy routines and quick touch-ups.

The formula includes argan oil to help condition and add shine, plus vegetable-derived ingredients selected to support a more comfortable colouring experience. BioKap’s Tricorepair complex combines rice proteins, willow derivatives, and fruit acids to help strengthen and protect the hair fibre, so hair feels softer and looks healthier after colouring.

Suitable for: Anyone who wants a natural-looking brown permanent colour with quick processing time, including those looking to cover grey hair at home.

Benefits:

  • Fast permanent colour: Designed to develop in 10 minutes for a quicker at-home routine.
  • Grey coverage: Provides 100% grey coverage for an even, consistent result.
  • Natural-looking brown tone: Creates a warm brown finish that looks believable and glossy.
  • Conditioning feel: Argan oil helps leave hair feeling softer and looking shinier.
  • Hair fibre support: Tricorepair complex helps support strength and protection during colouring.
  • Nickel tested: Dermatologically and nickel tested to help minimise the risk of irritation.
  • Vegan: Suitable for vegans.

Key ingredients and features:

  • Argan Oil: Helps condition and add shine for a smoother-looking finish.
  • Tricorepair complex: Rice proteins, willow derivatives, and fruit acids included to help protect and strengthen.
  • Vegetable-derived ingredients: Selected to support hair and scalp comfort during use.

How to use:

  • Always perform a skin sensitivity test 48 hours before use, even if you have used colouring products before.
  • Mix the colour tube directly into the application bottle for easy nozzle application.
  • Apply to hair and leave for 10 minutes, following the instruction sheet.
  • Rinse and use the after-dye shampoo as directed.
  • Use the protective cream, gloves, and cape included in the box for best results.

What is included:

  • 1 tube of hair colouring cream (60 ml)
  • 1 bottle of Nutrifix colour revealer emulsion (60 ml)
  • 1 sachet of after-dye shampoo (15 ml)
  • 1 protective cream sachet for the hairline
  • 1 instruction sheet
  • 1 pair of disposable gloves
  • 1 protective cape

Good to know:

  • For best coverage, apply to dry, unwashed hair unless the instruction sheet states otherwise.
  • Rinse thoroughly until the water runs clear, then avoid very hot water for the first few washes to help your colour stay fresh.

Buy BioKap Rapid Permanent Hair Dye Natural Brown from John and Ginger for a fast, at-home colour kit that keeps your routine simple while leaving hair looking glossy and well cared for. Enjoy fast UK delivery on qualifying orders and complimentary samples with your purchase.



It is designed to develop in 10 minutes, making it a quick option for at-home colouring and root touch-ups.
Yes, it is described as providing 100% grey coverage for an even, consistent brown result.
The kit includes 1 tube of colouring cream, 1 bottle of colour revealer emulsion, 1 sachet of after-dye shampoo, 1 protective cream sachet, 1 instruction sheet, 1 pair of disposable gloves and 1 protective cape.

Why this rapid natural brown hair colour suits quick home colouring
Fast 10 minute colour

The rapid formula develops in around 10 minutes, making it practical for root touch-ups or a full colour refresh at home.

Natural brown result

Shade 4.0 gives a natural-looking brown finish that feels wearable, glossy and easy to maintain.

Grey coverage support

The permanent colour is designed to cover greys, helping create a more even look from roots through to lengths.

Conditioned glossy feel

Argan oil and the Tricorepair complex help hair feel softer and look shinier after colouring.

Shade explanation
  • Natural Brown 4.0 is a classic brown shade with a natural-looking finish
  • A good option if you want a deeper brown without choosing black or very dark chocolate tones
  • Works well for covering grey roots or refreshing a similar existing brown shade
  • Designed for permanent colour with a glossy, even-looking result

A useful choice if you want quick at-home colour that looks natural, polished and simple to maintain.

Suitability

Suitable for those looking for a vegan-friendly permanent hair dye in a natural brown tone, including when grey coverage is part of the goal. The 135ml kit is practical for home colouring and includes the colour cream, revealer, after-dye shampoo, protective cream, gloves, cape and instruction leaflet.

Good to know: Always carry out a skin sensitivity test 48 hours before every use, even if you have used hair colour before. Mix and apply exactly as directed in the leaflet, leave to develop for 10 minutes, then rinse thoroughly and use the included after-dye shampoo.