If you reach for straighteners, tongs, or a hairdryer, a heat protectant is the least glamorous but arguably most important product in your routine. Repeated high heat lifts the cuticle and dries out strands over time, gradually leaving hair rougher, duller, and more prone to snapping. A good spray puts a buffering layer between your hair and the hot tool while helping to smooth and add slip, so styling is easier as well as kinder. It will not make heat harmless, but it meaningfully reduces the stress your styling puts on your hair.
The catch is that “heat protectant” covers a huge spread of formulas, from featherlight mists to rich creams and clever humidity-blocking sprays, and not all of them earn their place. We assessed how lightweight each formula feels, how well it primes hair for a smooth finish, how honestly it protects, and how naturally it fits into a real, rushed morning routine. From salon staples to high-street bargains, these six are the ones we would happily spray before switching on the heat. If you are already investing in bonding and repair products, a protectant is the sensible companion; our guide to hair masks for damaged hair covers the recovery side.
What to look for
Check the format and finish first. Mist sprays distribute evenly and suit fine hair that clogs easily, while richer primers or creams give more smoothing power for thick, coarse, or frizz-prone hair. Many products state a temperature they help protect up to, which is a useful guide, though real-world results depend far more on even application than on the number printed on the bottle. The goal is full, light coverage from mid-lengths to ends before any heat touches your hair.
Think about what else you want the spray to do. Some add shine, tame humidity, or offer a little hold and grip for styling, while others are purely protective and nothing more. Avoid overly heavy or oily formulas on fine hair, as they can leave it limp and lifeless before you have even picked up the straighteners. Consider whether you want a single product that also detangles or acts as a leave-in, which can streamline your routine considerably.
Whatever you choose, technique matters: apply to damp hair before blow-drying and lightly to dry hair before hot tools, working section by section so no part is left exposed. A protectant is only as good as its coverage, so do not rush it. Pairing a protectant with a finishing hair oil gives you both defence and gloss, the protection going on first and the oil adding shine at the end.
1. ghd Heat Protect Spray
A well-judged, lightweight mist from a brand that lives and breathes hot tools. It helps shield hair up to a high styling temperature, smooths the surface for easier styling, and leaves no residue or stickiness behind, so hair still feels like hair afterwards. The fine mist makes even coverage simple, and it slots into any routine without fuss. There is nothing gimmicky about it, which is precisely why so many stylists keep a bottle to hand and reach for it before every blow-dry or straightening session.
Why it made the six: It is a fuss-free, professional-grade protectant that suits nearly every hair type and pairs naturally with ghd’s own straighteners and dryers.
Price: Mid-range; stocked at Boots, LookFantastic and salons.
The Sixated take: The reliable default. If you own ghd stylers, this is the obvious and dependable match.
2. Tresemme Keratin Smooth Heat Protection Spray
The best-value protectant on the list by some margin. It offers dependable heat defence with a light, smoothing feel and a welcome hint of frizz control, all at a price that makes daily use genuinely painless. It is the sort of bottle you can spray liberally without watching the pennies, which matters if you heat-style every morning.
Why it made the six: It proves you do not need to spend much to protect your hair, making it ideal for frequent heat-stylers working to a budget.
Price: Budget; a supermarket and Boots staple.
The Sixated take: The everyday workhorse. Keep a bottle by the dryer and use it generously without a second thought.
3. Color Wow Dream Coat Supernatural Spray
A cult anti-humidity spray activated by heat that leaves hair strikingly smooth and glossy while helping guard against frizz for days at a time. It is applied to damp hair then blow-dried to activate, and the results are genuinely impressive on frizz-prone, wavy, or unruly hair that usually swells the moment it rains. The smoothness can survive several washes.
Why it made the six: It combines heat styling with genuine humidity resistance, so a blow-dry holds its smoothness far longer than usual.
Price: Upper mid-range; available at Space NK and Sephora UK.
The Sixated take: Best for anyone battling humidity or frizz. Follow the damp-to-dry method precisely for the full effect.
4. Living Proof Restore Perfecting Spray
A silky leave-in mist that detangles, smooths, and helps protect against heat while softening the appearance of dry, damaged-looking ends. It feels weightless and doubles as a general leave-in for easier styling, so it pulls double duty in a way that busy routines appreciate. The finish is soft and touchable rather than coated.
Why it made the six: It multitasks well, offering protection alongside detangling and softness in a single, lightweight step.
Price: Premium; sold at Space NK and Cult Beauty.
The Sixated take: A smart pick if you want a protectant that behaves like a light leave-in too, saving you a product.
5. OUAI Heat Protection Spray
A refined, lightweight mist that shields against high heat while adding a soft shine and the brand’s much-loved signature scent. It absorbs cleanly and works well on damp or dry hair without any crunch or stiffness, making it a pleasure to use rather than a chore. The elegant feel belies its everyday practicality.
Why it made the six: It brings a polished, pleasant-to-use feel to an everyday step, with reliable protection and no heaviness.
Price: Mid-range; available at Space NK and Sephora UK.
The Sixated take: The luxe-feeling everyday option, especially lovely for fine-to-medium hair that dislikes weight.
6. Bumble and bumble Hairdresser’s Invisible Oil Heat/UV Protective Primer
A leave-in primer that detangles, softens, and helps protect against heat and UV while priming hair for smoother styling. It leans conditioning, making it a good fit for dry or unruly hair that needs help before the dryer, and it sets up the rest of your styling nicely by taming knots and roughness first. A little goes a surprisingly long way.
Why it made the six: It works as both a protectant and a detangling primer, streamlining the very start of any heat-styling routine.
Price: Premium; stocked at Space NK and John Lewis.
The Sixated take: The choice for thicker, drier hair that wants extra slip and softness built into its protection.
No protectant makes heat styling risk-free, so pair yours with sensible habits: use the lowest effective temperature, keep the dryer moving rather than dwelling in one spot, and give your hair regular heat-free days to recover. A protectant also works best on hair that is already in reasonable condition, so keep up with conditioning treatments and gentle cleansing; our guide to sulfate-free shampoos supports that gentler routine. Applied evenly, section by section, and consistently, these sprays are one of the simplest and most cost-effective ways to keep heat-styled hair looking healthier for longer. It is worth remembering that even the most expensive protectant cannot undo the effect of daily high heat with no rest, so think of your spray as one part of a wider habit rather than a licence to crank the temperature up. Combined with a light hand on the dial and regular conditioning, any of these six will keep your hair looking smoother and glossier through years of styling.
