Quick answer
Apply Repair360 Leave-In Foam to damp, freshly washed curls before any heat tool touches your hair. It is a lightweight foam that supports strength and shine while providing thermal protection up to 450°F, so it doubles as your heat protectant and your leave-in. If your curls are already breaking, staying limp, or refusing to revert after washing, stop heat styling and give the hair a recovery period instead of adding more heat.
heat protectant
Why heat hits curls harder than straight hair
Curly and coily strands have more bends, and every bend is a natural weak point where moisture escapes and stress concentrates. A flat iron or blow dryer applies heat unevenly across those bends, so the same temperature that leaves straight hair smooth can leave curls brittle at the curve. That is why the prep step matters more for curls than for any other hair type: you are not just smoothing a surface, you are reinforcing the strand before it is stressed.
The practical takeaway is to treat heat protection as a leave-in step, not a finishing spray. Product applied to damp hair distributes evenly through the strand and dries in place. Product applied to dry, already-styled hair mostly sits on top, which is why some people feel greasy after heat styling and still see damage.
How to apply Repair360 Leave-In Foam before heat styling
Start on damp hair after washing or refreshing, not soaking wet. Dispense a small amount into your palms, rub them together, and rake the foam through sections from mid-length to ends first, then work whatever is left near the roots. Foam spreads further than cream, so begin with less than you think you need and add in small increments.
Once the foam is distributed, detangle gently with a wide-tooth comb or your fingers, then let the hair air dry to about 80 percent before picking up a diffuser or blow dryer. If you plan to flat iron, the hair should be fully dry first; going over damp or partially dry hair with a flat iron traps moisture and steams the strand, which is a common cause of that crunch you feel afterward. Because the foam provides thermal protection up to 450°F, you can set your tool below that ceiling, but staying well under it is still the kinder choice for curls.
- Damp hair, not soaking wet, for even distribution.
- Mid-length to ends first, roots last.
- Air dry to about 80 percent before diffusing.
- Fully dry before any flat iron passes through.
Leave-in foam vs heat protectant spray: which to reach for
A spray is convenient for refreshing a dry style or a quick touch-up, but it gives you a thin, fast-drying layer. A leave-in foam like Repair360 does two jobs at once: it delivers Vegan Protein and Amino Acids to support strength and shine while also providing the thermal protection. If you are doing a full wash-and-go, blowout, or flat iron session, the foam is the more thorough option because it is worked through the hair rather than misted over it.
If you already own a spray you like, you do not have to throw it out. Use the foam as your prep on wash day and keep the spray for second-day touch-ups. The mistake to avoid is layering several heat protectants at once, which adds weight and can leave curls flat before the heat even starts.
Keeping shine without frying the curl pattern
Heat styling and curl definition pull in opposite directions, so decide which one you want from each session. If definition is the goal, keep the temperature low and use a diffuser rather than direct contact tools. If you want a smoother, stretched look, accept that some pattern loosening is the tradeoff and plan a recovery wash within a few days.
For finishing, Shine Spray adds luminous, soft shine to curls while nourishing and protecting against humidity, and it is lightweight enough not to undo the work you did with the foam. On non-heat days, Hydrating Mist with Aloe, Avocado and Coconut Oil revitalizes and adds moisture, and it works alone or layered with your styling products. Alternating heat days with moisture days is what keeps curls springing back.
Diagnose your heat damage before your next styling session
- Symptom: curls fall flat within hours of styling: Likely cause: the hair is dry underneath the product, so there is nothing holding the shape once the heat fades. Corrective action: go back to damp-hair application of Repair360 Leave-In Foam and skip the flat iron for one cycle to let moisture rebuild. If definition returns after one no-heat wash, the issue was moisture, not your curl pattern.
- Symptom: ends feel crunchy or snap when you comb: Likely cause: repeated passes with a tool on hair that was not fully dry, or a temperature set too high for the strand. Corrective action: drop the temperature, confirm the hair is completely dry before flat ironing, and trim split ends rather than coating them. Stop heat styling on any section that snaps. Trim first, then resume.
- Symptom: a section stays straight after washing: Likely cause: heat damage has changed the bond structure in that area, which no product can reverse. Corrective action: keep heat away from that section and let it grow out, trimming gradually. This is the point to choose another option. If a section will not revert after a wash, more heat protectant will not fix it.
Product facts
- Repair360® Leave-in Foam: Repair360 Leave-In Foam is a lightweight foam that rebuilds damaged strands from the inside out, boosted by Repair360, Vegan Protein and Amino Acids, and provides thermal protection up to 450°F. One product covers both your leave-in and your heat protection step, so you are not layering a separate protectant on top of a leave-in and weighing curls down.
- Shine Spray: Shine Spray is an ultra-lightweight spray with Castor Oil and Plumeria Extract that adds luminous, soft shine to curls while nourishing and protecting against humidity. Useful as a finishing step after heat styling when you want shine without a heavy product that would pull definition out of the curls.
- Hydrating Mist: Hydrating Mist is a refreshing mist with Aloe, Avocado and Coconut Oil that revitalizes, adds moisture and works alone or layered with styling products. A good option on the days between heat sessions to restore moisture before the next wash day.
