4D Defence (250ml)
Dispatch from 1 October 2026. Orders placed now are reserved and dispatched from that date.
What it does
4D Defence is a lightweight leave-in spray infused with Mediterranean Carob and Golden Linseed, built on the Omni Shield Complex technology. It is designed to protect against heat, humidity, friction and environmental aggressors while keeping the hair light, and the label states it is suitable for all hair types. It is a complement to any home hair routine, not a product exclusive to the Sensorial Repair line.
Key actives (as on the label)
- Polysilicone-29
- Linseed Extract
- Hydrolyzed Quinoa
- Carob Seed Extract
The formula also carries a soy protein, per the label's ingredient highlights.
When to use it
Daily, on damp hair after washing, whatever Piur London home care line was just used, and especially after a professional smoothing, straightening or reconstruction service: the label states it helps preserve salon results.
How to use it
- Spray 2 to 3 times on damp hair, from the lengths to the ends.
- Comb through.
- Blow-dry or air-dry.
- Use daily after washing.
What not to do
- For external use only.
- Avoid contact with eyes.
- Discontinue use if irritation occurs.
- Keep out of reach of children.
