This spray is for anyone who regularly flat-irons their hair and wants a protective barrier against that specific heat source, plus added shine and flyaway control afterward. It suits any hair type or texture, including coloured or damaged hair, but it is a protectant and finishing spray rather than a straightening or smoothing product in its own right, so it's typically paired with a separate styling lotion or blowout for the actual straightening step.

Firewall's role is narrower and more specific than a general heat-protectant spray: it's built to sit between hair and a flat iron specifically, using a silicone blend that helps the plates glide smoothly through hair (cutting down on the tugging that causes breakage) while argan oil adds shine, and it doubles as a finishing spray afterward rather than only being a pre-heat step.

Spray onto dry, sectioned hair from about 6-8 inches away before flat-ironing, or mist over finished hair afterward as a shine-boosting finishing spray.

Pros:

• Genuine argan oil plus a silicone blend that helps the flat iron glide through hair, reducing snagging and mechanical breakage
• Adds real shine as a finishing spray, not just heat protection
• Works two ways - pre-heat mist or post-style finishing spray
• Heat protection rated to a verified 425°F/218°C

Cons:

• Aerosol/propellant-based, so it needs a well-ventilated space and isn't fragrance-free
• Contains several fragrance allergens (limonene, linalool, geraniol, citronellol, eugenol)
• Doesn't straighten or smooth hair on its own, so it needs to be paired with a styling step
• Can build a slight residue if over-applied before ironing