There is one uncomfortable fact that has to come first: a split end cannot be permanently repaired. Once the cuticle has worn away and the cortex underneath has frayed into two or three strands, no product closes it back up for good. That is why learning how to prevent split ends matters far more than learning how to treat them — prevention is the only part of this you actually control.
The good news is that split ends are almost entirely a mechanical problem, and mechanical problems have practical solutions. Here is what causes them, the eight habits that stop them forming, and what to do about the ones you already have.
What actually causes split ends
Every strand of hair is wrapped in a cuticle — overlapping scales that lie flat like roof tiles and protect the cortex underneath. Split ends form when enough of that cuticle has been worn away at the tip that the cortex is exposed and starts to fray.
The wear comes from four sources, roughly in order of how much damage they do:
- Mechanical friction — brushing, towel-drying, hair ties, pillowcases, clothing, backpack straps.
- Heat — straighteners and curling irons above 180 °C, and blow-drying on high heat at close range.
- Chemical processing — bleach, permanent colour, relaxers and repeated smoothing treatments.
- Environmental exposure — UV, chlorine, salt water and very dry air.
Note that the ends of your hair are the oldest part of it. On shoulder-length hair the tips are around two years old and have been through roughly seven hundred washes. They are not damaged because you did something wrong last week — they are damaged because they have been alive the longest.
How to prevent split ends: eight habits that work
1. Get a trim before you need one
This is not upselling. Once a split starts, it travels up the shaft, and every millimetre it climbs is hair you will eventually lose anyway. A small trim every ten to twelve weeks removes the splits while they are still in the last centimetre. Waiting six months means cutting off far more.
If you are growing your hair, this feels counterintuitive. It should not — length retention is about keeping ends intact, not about avoiding scissors. Our stylists cover this properly, and you can find one near you through our pros.
2. Never brush hair from the top down
Start at the ends, work upward in sections, and let the tangle release rather than dragging through it. Brushing from the scalp down pushes every knot into a single compressed tangle at the tips, which is where the splits then form.
3. Treat wet hair as fragile
Wet hair stretches up to thirty percent further than dry hair before it breaks, and it does not fully recover. That means no vigorous towel-rubbing, no aggressive brushing, and no tight ponytails while wet. Squeeze water out with a microfibre towel or an old cotton t-shirt, then detangle with a wide-tooth comb and a leave-in.
Microtexx Micro-Amino Surge Oxygen Silk Serum 50ml is a good choice at this stage — it smooths flyaways and reinforces the shaft while you detangle, so the comb glides rather than snags.
4. Use heat protection every single time
Not most times. Every time, including on a quick blow-dry. Heat protectants work by raising the temperature at which the keratin structure starts to break down and by slowing the rate at which water leaves the shaft. Floractive W Protection 60ml is a light daily spray that also shields against UV, which matters more in Australia than most guides admit.
And lower the tool temperature. Most people straighten at 200 °C or above out of habit. Fine and colour-treated hair rarely needs more than 160–180 °C, and the difference in cumulative damage over a year is substantial.
5. Seal the ends with an oil
A finishing oil does not repair anything, but it does reduce friction and slow moisture loss — which is genuinely preventative. K18 Molecular Repair Hair Oil 30ml is weightless enough for fine hair and doubles as a heat shield, so it earns its place in the routine twice.
Two to three drops, warmed in the palms, applied from the mid-lengths down. Never at the root.
6. Change what your hair sleeps on and in
Eight hours of cotton friction, every night, adds up faster than any styling tool. A silk or satin pillowcase reduces the drag considerably. If you tie your hair up, use a soft fabric scrunchie rather than an elastic, and place it loosely — the crease line where a tight elastic sits is a very common breakage point.
7. Rethink your protein-to-moisture balance
Brittle, snappy ends are sometimes a moisture problem and sometimes a protein problem, and treating the wrong one makes it worse. Hair that feels rough, stiff and straw-like after treatments usually has too much protein. Hair that feels mushy, over-elastic and limp when wet usually needs protein.
A reconstructive treatment like Microtexx Reconstructive Masque 250ml is the right call for the second group, used weekly. If your hair already feels stiff, skip it and use a moisture mask instead.
8. Space out the chemical services
Bleach, permanent colour and smoothing services are the fastest route to split ends because they permanently alter the cuticle. That does not mean stop — it means space them out, keep bleach off the previously lightened lengths, and use a bond treatment alongside. Browse the options in the damaged hair collection if you colour regularly.
What to do about the split ends you already have
Two honest options, in order of usefulness.
Cut them
It is the only permanent fix. A dusting — taking half a centimetre off the very ends — removes the splits without visibly changing the length, and it makes the hair look thicker at the bottom immediately, because frayed ends are what create that see-through, wispy look.
Temporarily bind them
Silicone-based serums and bond-building leave-ins can hold a split closed cosmetically and stop it climbing as fast. This is a delay, not a repair, but a meaningful one. K18 Leave In Molecular Repair Mask 50ml works at the internal keratin-chain level rather than just coating the outside, which is why it holds up better than a straight silicone serum between trims.
What does not work: "split end mending" claims that promise permanent repair, and dusting your own hair with kitchen scissors, which are blunt enough to create new splits with every cut.
For a deeper look at the science of what can and cannot be repaired, we have covered it in split ends explained: can anything really repair them?
A simple weekly routine to keep ends intact
- Wash two to three times a week, focusing shampoo at the scalp and letting the suds rinse through the ends.
- Condition mid-lengths to ends, leave for two to three minutes, rinse cool.
- Treat once a week with a mask suited to your protein-moisture balance — the technique in our guide to how to use a hair mask properly matters as much as the product.
- Detangle with a wide-tooth comb and a leave-in, ends first.
- Protect with a thermal spray before any heat, no exceptions.
- Seal the ends with a few drops of oil once styled.
- Trim every ten to twelve weeks.
You can browse professional options for each of these steps in the treatments collection.
Frequently Asked Questions
Can split ends be repaired without cutting?
No, not permanently. Bond builders and serums can hold a split closed and slow its progress, which buys you time between trims and makes the hair look and feel better. But the only way to remove a split end is to cut it off.
How often should I trim to prevent split ends?
Every ten to twelve weeks for most people. Fine or chemically treated hair often benefits from every eight. If you are growing your hair, a small dusting rather than a full cut preserves length while still removing the damage.
Does cutting split ends make hair grow faster?
No — growth happens at the follicle and is unaffected by trimming. But it does make hair get longer, because you stop losing length to splits travelling up the shaft. Length retention and growth rate are two different things.
Why do I get split ends even though I never use heat?
Mechanical friction is the most common cause and has nothing to do with heat. Brushing habits, towel-drying, tight hair ties, cotton pillowcases and clothing rubbing at the shoulders all wear the cuticle down. If you are heat-free and still splitting, look at how you handle your hair when it is wet.
Do split ends stop hair from growing?
They do not stop growth, but they can completely mask it. If your hair splits and breaks at the same rate it grows, the length never changes — which is why so many people believe their hair "will not grow past a certain point". It usually will, once the ends stop fraying.
Is it worth using a bond builder if my ends are already split?
Yes, but with realistic expectations. A bond builder will improve the strength and feel of the hair above the split and slow further splitting. It will not close the existing one. Use it alongside regular trims, not instead of them.
The short version
Split ends are mechanical damage to the oldest part of your hair, and prevention is the only real cure. Brush from the ends up, handle wet hair gently, protect against every application of heat, seal the ends with oil, sleep on silk, and trim every ten to twelve weeks. Do those six things consistently and split ends stop being a recurring problem — they become an occasional one.