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How to Fix Damaged Hair: The Ultimate Hair Repair Guide

Updated On 10/06/2026

If your hair is feeling more like straw than silk, you’re not alone. Damaged hair is one of the most common concerns we see in the salon, caused by a cocktail of chemical treatments, relentless heat styling, and environmental stressors that leave strands weak and brittle.

But here is the good news: you don't necessarily have to chop it all off. With the right science-backed hair care, you can bring compromised hair back from the brink. Redken’s Acidic Bonding Concentrate collection (ABC) system is recommended by pros to repair weakened bonds, rebalance your hair’s pH, and restore both strength and moisture.

Read on to discover the root causes of hair damage, how to spot the warning signs, and the ultimate step-by-step routine to achieve healthier, stronger hair.

How to Fix Damaged Hair: The Ultimate Hair Repair Guide

If your hair is feeling more like straw than silk, you’re not alone. Damaged hair is one of the most common concerns we see in the salon, caused by a cocktail of chemical treatments, relentless heat styling, and environmental stressors that leave strands weak and brittle.

But here is the good news: you don't necessarily have to chop it all off. With the right science-backed hair care, you can bring compromised hair back from the brink. Redken’s Acidic Bonding Concentrate collection (ABC) system is recommended by pros to repair weakened bonds, rebalance your hair’s pH, and restore both strength and moisture.

Read on to discover the root causes of hair damage, how to spot the warning signs, and the ultimate step-by-step routine to achieve healthier, stronger hair.

Common Causes of Hair Damage

Understanding what causes hair damage is the first step to fixing it. Before you can repair the hair fibre, you need to identify the culprit. The most common causes include:

  • Chemical Treatments: Colouring, bleaching, perms, and chemical relaxers actively break down the hair structure and weaken internal bonds to alter your hair's appearance.
  • Heat Styling: Frequent use of flat irons, curling wands, and blow dryers at high temperatures aggressively strips moisture and damages the protein bonds within the hair shaft.
  • Environmental Stressors: Harsh Australian sun exposure, pollution, chlorine, and hard water strip away natural moisture and roughen the hair cuticle.
  • Mechanical Damage: Rough brushing, aggressive towel drying, and wearing tight hairstyles put physical stress on the hair, leading to breakage and split ends.
  • Inadequate Care: Using harsh, stripping shampoos, skipping conditioning treatments, or neglecting heat protectants leaves your hair dry, exposed, and highly vulnerable.

 

Signs of Damaged Hair

Not sure if your hair is just a little dry or genuinely damaged? Recognise the signs early so you can take action and prevent further deterioration:

  • Dryness and Brittleness: Your hair feels coarse, lacks softness, and snaps easily when brushed.
  • Split Ends: The ends of your hair strands appear frayed, white, or split into two or more parts.
  • Frizz and Rough Texture: The hair cuticle is raised, making the hair difficult to manage, dull, and lacking smoothness.
  • Excessive Breakage: You notice shorter, broken hairs around your hairline or find an excessive amount of snapped strands on your clothes and in your brush.
  • Loss of Shine: Hair appears lacklustre and dull because a damaged, raised cuticle cannot reflect light.
  • High Porosity: Your hair absorbs water instantly in the shower but dries incredibly fast, often feeling hollow, gummy, or weak when wet.

 

How to Repair Damaged Hair: A Step-by-Step Routine

Repairing damaged hair requires a consistent, prescriptive routine focused on rebuilding hair bonds, restoring moisture, and protecting strands from further harm. Here is how to fix damaged hair using Redken's pro-approved regimen.

 

Step 1: Pre-Treat with Intensive Bond Repair 

Begin your regimen 1-2 times a week with Redken’s  ABC Intensive Treatment. This concentrated pre-shampoo formula penetrates deeply into the hair fibre to repair broken bonds and prepare the hair for cleansing and conditioning.

Before & After application of ABC Intensive Treatment.

Step 2: Cleanse Gently and Strengthen

Use Redken’s Acidic Bonding Concentrate Shampoo every wash. Its sulfate-free, bond-fortifying formula gently cleanses without stripping moisture, while rebalancing the hair’s pH to strengthen weakened areas. For added protein support on highly distressed hair, Extreme Hair Strengthening Shampoo is an excellent alternative to reinforce strands from root to tip.

Step 3: Condition Deeply and Seal Bonds

Apply the Acidic Bonding Concentrate Conditioner. This conditioner closes the hair cuticle, improve smoothness, and lock in vital moisture. For more intense repair, substitute your regular conditioner once or twice weekly with the  ABC 5-Minute Liquid Mask, which delivers ultra-hydration and fortifies hair bonds.

Step 4: Protect and Repair with Leave-In Treatments

Finish your routine by applying Redken’s Acidic Bonding Concentrate Leave-In Treatment to damp hair. This multi-benefit powerhouse repairs bonds continuously, protects hair from heat (up to 230°C), controls frizz, and detangles strands for easier styling. Alternatively, the Extreme Anti-Snap leave-in offers 5-in-1 protection to specifically target and reduce split ends.

Pro Tips to Prevent Future Damage

Once you start rebuilding your hair's strength, you need to protect your investment. Keep your hair healthy with these daily habits:

  • Limit Heat and Styling Tool Use: Avoid frequent use of hot tools. When heat styling is absolutely necessary, always use a premium heat protectant treatment to minimise damage, and give your hair regular breaks to allow for recovery.
  • Protect Hair from Environmental and Mechanical Stress: Wear hats to shield your hair from sun exposure. Use gentle handling techniques—avoid harsh brushing or aggressive towel drying—and opt for loose hairstyles to prevent unnecessary tension.
  • Sleep on Silk or Satin: Switching to a silk or satin pillowcase reduces friction on the hair cuticle while you sleep, minimising breakage, frizz, and split ends.
  • Maintain Regular Professional Treatments: Enhance your at-home care by booking professional bond-building treatments at your salon. These in-salon services complement Redken’s ABC system by targeting internal damage with advanced technology.

 

Frequently Asked Questions

Can severely damaged hair actually be fixed?

While you cannot permanently "glue" a split end back together (those need to be trimmed), you can repair the internal structure of damaged hair. Using bond-building products formulated with Citric Acid helps to reinforce weakened bonds inside the hair shaft, restoring strength, elasticity, and a healthy appearance to the mid-lengths and ends.

How long does it take to repair damaged hair?

With a targeted, professional-grade routine like the Acidic Bonding Concentrate system, you can see and feel a difference after just one use—including reduced breakage and increased smoothness. However, for long-term structural repair, consistent use over 4 to 6 weeks is recommended to truly rebuild the hair's integrity.

Is it better to cut damaged hair or try to repair it?

It is a combination of both. If the ends of your hair are severely split or frayed, a trim is essential to stop the split from traveling further up the hair shaft. Once the irreparable ends are removed, you should immediately start a bond-repairing hair care routine to strengthen the remaining hair and prevent future damage.

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