Design Essentials Agave and Lavender Weightless Thermal Protectant Serum 4oz
420 degrees Fahrenheit is the number that matters. Most flat irons for textured hair run between 350 and 450, so a protectant rated to 420 covers the range a silk press actually uses, and it tells you the serum was formulated for that job rather than for blow drying alone. Design Essentials keep the texture genuinely light. Agave and lavender carry it, and the serum spreads thin enough that curly and coily hair does not end up weighed down before the iron even touches it. Sealing the cuticle is what delivers the glossy, frizz-free finish, and it is also what keeps a press looking good for longer than a day.
It handles the whole range, from pressing 4c coils to smoothing 2b waves. 4oz, applied in sections to clean damp or dry hair before you reach for heat. Skip it and you are ironing unprotected hair, which is the fastest way to turn curls into permanent heat damage.
We list the full INCI where the brand supplies it. For this one it is not on file yet, so the pack is the reliable source. If you need to check an ingredient before you buy, message us and we will read it off the bottle.
- 24-hour delivery
- Every brand we carry ships within 24 hours, not just the hero lines. Order before 2pm and it leaves the same working day.
- Free over £40
- UK delivery is free on orders over £40. Below that it is a flat rate, shown at checkout before you pay.
- Tracking
- You get a tracking link by email the moment it is picked up.
- 30 days
- Send anything unopened back within 30 days for a full refund. No explanation needed.
- Opened it and it is wrong for your hair?
- Tell us what happened. Curl products are hard to judge from a photo, and we would rather swap it than have you stuck with it.
- We price match
- Find it cheaper somewhere else and we will match the price.
Application tips
Two or three drops into the palms, rubbed together until they warm, then pressed through a section from mid-length down. The ends take the most heat, so they get the most serum.
Cover every section before the iron comes anywhere near the hair. Do not layer it over a heavy cream or a gel, and do not go back for more halfway through, because an over-oiled section will fry rather than press.
Results
The hair takes an iron in fewer passes and comes out glassy rather than merely straight. Flyaways lie down along the length instead of lifting away from the section.
Weight is the thing this gets right. Curly and coily hair keeps its bounce afterwards rather than hanging limp, and a press holds its shine for days instead of going dull overnight.
Composition
- Agave
- Seals the cuticle so the strand takes heat without roughing up
- Lavender Oil
- Smooths the surface and leaves a glossy, frizz-free finish
The full INCI is printed on the pack. We publish it here as soon as the brand supplies it, and we will read it off the bottle for you if you ask.
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