Renu Hair Mask (UK)

ReNu Hair Mask: Deep Conditioning That Triples the Strength of Damaged Hair

ReNu Hair Mask is a weekly deep conditioning treatment that penetrates the hair shaft to deliver intensive hydration and structural repair. In Nu Skin's laboratory testing, the formula tripled the tensile strength of damaged hair — meaning strands that were prone to snapping could withstand three times more force before breaking. The key is CS7, an innovative cuticle-smoothing agent that acts as a molecular glue, sealing damaged cuticle scales and preventing the split ends and breakage that make hair look thin and rough.

Think of it as a weekly reset for your hair. Daily shampoo and conditioner maintain the basics, but this mask goes deeper — addressing the accumulated damage from heat styling, colouring, environmental exposure, and the mechanical stress of brushing and tying hair up.

What Sets ReNu Hair Mask Apart

CS7 is the ingredient that makes this mask different from the dozens of hair masks you'll find at Boots. Most masks hydrate the hair temporarily — the moisture sits inside the shaft until it evaporates or washes out. CS7 actually repairs the cuticle layer, the protective outer shell of each strand. By sealing cuticle scales shut, it locks moisture in and prevents further damage. The result lasts up to 7 days per application — not just until your next wash.

The deep hydration component penetrates the cortex (the structural core), which is where damage from heat and chemicals accumulates. By reaching this deeper layer, the mask addresses brittleness at its source rather than just smoothing the surface.

Key Ingredients

CS7 (Cuticle Smoothing Agent): Proprietary compound that seals damaged cuticle scales, acting as molecular glue for the hair's outer protective layer. Prevents split ends, reduces breakage, and locks in moisture for up to 7 days.

Deep Hydration Complex: Penetrates the hair cortex to deliver intensive moisture where structural damage occurs. Restores elasticity and flexibility to brittle strands.

Smoothing Agents: Provide immediate detangling and manageability. Hair feels silky and looks glossy from the first use.

How to Get the Most from ReNu Hair Mask

Use once a week after shampooing. Apply generously from mid-lengths to ends (where damage is worst), comb through with a wide-tooth comb for even distribution, and leave for 5–10 minutes. For severely damaged hair, extend to 15 minutes under a warm towel — the heat opens the cuticle and allows deeper penetration. Rinse thoroughly with cool water to seal the cuticle.

This mask pairs naturally with either the ReNu Smoothing or Volumizing shampoo and conditioner. On mask days, you can skip your regular conditioner — the mask provides more than enough conditioning on its own.

In the UK, this mask is particularly valuable during winter. The constant shift between cold outdoor air and heated indoor environments stresses the hair cuticle, and chlorinated swimming pool water (a common winter activity) strips natural oils. A weekly mask session repairs that damage before it accumulates.

Frequently Asked Questions

How quickly can I get ReNu Hair Mask delivered in the UK?

We ship from the official Nu Skin UK warehouse. Standard delivery typically arrives within 3–5 working days across the UK.

Can I use this more than once a week?

For severely damaged hair, twice weekly is fine for the first 2–3 weeks. After that, once weekly is sufficient for maintenance. Over-masking can lead to protein overload, making hair feel stiff — so don't exceed twice weekly.

Is this suitable for fine hair?

Yes, but use a lighter application — focus on the very ends rather than working up to mid-lengths. Fine hair doesn't need as much product, and the mask is rich enough that a little goes a long way.

How long does a tub last?

With weekly use on shoulder-length hair, expect approximately 10–12 weeks per tub.

Important Information

Individual results may vary. This product is intended for cosmetic use only and is not designed to diagnose, treat, cure, or prevent any disease or skin condition. Discontinue use if irritation occurs and consult a dermatologist or your GP. Patch test recommended before first use.

Clinical results referenced are from studies conducted or commissioned by Nu Skin Enterprises, Inc. and may not reflect typical consumer experience.

Sources & References

Product specifications and tensile strength data sourced from Nu Skin UK official product documentation (2024).

NuBest Skin is an Independent Nu Skin Brand Affiliate. This website is independently operated and is not produced, endorsed, or approved by Nu Skin Enterprises, Inc.

Product information reviewed by the NuBest Skin Editorial Team. Last updated April 2026.