When hair feels dry, rough and hard to manage, a weekly deep mask is one of the simplest fixes. The Margaret Josefin Deep Hair Mask is an intensive conditioning mask built around marine and heat-coat collagen, with plant-derived moisture from okra and seaweed. Here is what is in it, how long to leave it on, how often to use it, and how to pair it with the matching Essence for everyday care.
The short answer: after shampooing, apply it from roots to ends, leave it on for about 5 minutes and rinse. Use it once or twice a week, or daily if your hair is severely damaged.
At a Glance
| Deep Hair Mask | |
|---|---|
| Type | Intensive conditioning and moisturizing hair mask (rinse-out) |
| Best for | Dry, damaged hair; made for straight and naturally wavy hair |
| Key ingredients | Marine and heat-coat collagen, okra extract (plant-derived hyaluronic acid), seaweed extract (algae acid) |
| How often | Once or twice a week; daily if severely damaged |
| Leave on | About 5 minutes |
| Size and scent | 8.8 oz (250 g) jar, passion fruit scent |
| Price | Margaret Josefin Deep Hair Mask: $40 |
What’s Inside and What It Does
The mask has a high concentration of active ingredients. Here is what each key one is there for:
| Ingredient | On the label as | What it does |
|---|---|---|
| Marine and heat-coat collagen | Hydrolyzed Collagen; Hydrolyzed Collagen PG-Propyl Methylsilanediol | Repair hair and lock moisture in |
| Plant-derived hyaluronic acid | Abelmoschus Esculentus (okra) Fruit Extract | Penetrates wet hair to restore moisture and elasticity |
| Algae acid | Algin (from seaweed) | Penetrates wet hair to restore moisture and elasticity |
It also contains hydrolyzed silk, sodium hyaluronate, olive oil, vitamin E (tocopherol), vitamin C (ascorbic acid) and chamomile extract. The formula includes silicones (dimethicone and amodimethicone), which give the smooth, soft finish; the full list is on the product page.
How to Use It
- Shampoo as usual and gently squeeze out excess water.
- Apply from roots to ends. Use enough to coat the hair evenly.
- Massage gently to spread it through.
- Leave it on for about 5 minutes.
- Rinse well with water.
Avoid contact with your eyes.
How Often to Use It
| Your hair | How often |
|---|---|
| Dry or a little rough | Once a week |
| Very dry, or damaged from heat or chemical services | Twice a week |
| Severely damaged | Daily, until it feels better, then once or twice a week |
Pair It With the Essence for Daily Care
The mask works on wash day. Between masks, the Margaret Josefin Intensive Hair Care Essence ($64) is the leave-in partner: a lightweight, amino-acid-based oil with marine collagen that helps repair hair damaged by color or perm and turns dry, brittle hair smooth and shiny without leaving it greasy. Trehalose in the formula helps protect hair from UV rays.
| When | What to do |
|---|---|
| Wash day (1–2 times a week) | Shampoo → Deep Hair Mask for about 5 minutes → rinse → one pump of Essence on towel-dried ends → blow-dry |
| Other wash days | Shampoo and conditioner → Essence on towel-dried ends → blow-dry |
| Dry hair, any time | A small amount of Essence on the ends for instant shine |
How It Compares to Other Masks We Carry
| Mask | Best for | Price |
|---|---|---|
| Margaret Josefin Deep Hair Mask | Dry, damaged, straight or naturally wavy hair; deep moisture | $40 |
| Amatora QUO KitomasQ | Adds volume, smooths texture and helps repair damaged hair | $50 |
| Amatora QUO ColamasQ | Color-treated or permed hair; formulated to help prevent color fading | $55 |
For a wider comparison, see our guide to the best Japanese hair treatments.
Frequently Asked Questions
How long should I leave the Margaret Josefin mask on?
About 5 minutes after shampooing, then rinse well.
Can I use it every day?
Yes, if your hair is severely damaged. Otherwise, once or twice a week is enough.
Does it work on curly hair?
The mask is made for straight and naturally wavy hair. If your hair is curly or coily, ask us before you buy and we’ll suggest the best fit.
Does it contain silicone?
Yes. Dimethicone, amodimethicone and aminopropyl dimethicone are in the formula, which helps give the smooth, soft finish.
Is it good for color-treated hair?
It is a deep moisturizing mask for dry, damaged hair, including hair that is dry after coloring. For daily care of color- or perm-damaged hair, pair it with the Intensive Hair Care Essence, which is made for exactly that.
Shop the Deep Hair Mask, $40 · All Margaret Josefin. U.S. orders over $40 ship free from our salon in Irvine, California.