As a beauty editor based in Seoul, I spend a significant amount of time observing the grooming habits at Olive Young in Myeongdong. One of the most common struggles for men with thick, straight hair is the way it sticks out at the sides, ruining the clean lines of a two-block haircut. While many assume this sleek K-pop idol hairstyle requires constant salon visits, the reality is much more accessible. Most of my colleagues and friends use a DIY home perm kit to keep their hair pressed down. Specifically, the DASHU Premium Fast Down Perm 10 has become a staple in the local men's grooming routine because it delivers salon-grade results in a 10-minute application. It typically costs around ₩18,000 ($13.20) at local shops, which is a fraction of the ₩40,000 ($29.50) you would pay for a single service at a professional hair shop in Gangnam.
What is a Korean Down Perm?
A down perm is a chemical hair treatment used to flatten hair that grows horizontally or sticks out from the scalp. By using a hair softening agent, the treatment temporarily breaks the hair's structural bonds, allowing it to be reshaped and pressed flat against the head for a more polished appearance.
In the world of Korean cosmetics, hair management is just as vital as achieving glass skin. For men, the goal is often to reduce the volume on the sides of the head to make the face appear slimmer. This process involves a neutralization process that ensures the hair stays flat for two to four weeks, depending on how fast your hair grows. Unlike traditional perms that add curls, this is strictly about volume reduction and control.
"Fast Down Perm" — Product Title [1]
The 10-Minute Application Process at Home
The 10-minute application refers to the processing time required for the chemical cream to soften the hair enough to be molded. The entire DIY home perm process, including preparation and rinsing, usually takes about 20 to 25 minutes from start to finish.
When you open the kit, you will find an application brush and perm paper. You apply the cream to dry hair, specifically targeting the roots of the side hair. After combing it down flat, you place the perm paper over the area to hold the hair in place. I have found that waiting exactly 10 minutes is the sweet spot; leaving it on longer can lead to hair breakage or scalp irritation. After the time is up, you must rinse thoroughly with a hair protein treatment or a mild shampoo to stop the chemical reaction.
Product Specifications and Value
Understanding the technical details of the kit helps in comparing it with other Korean skincare products and hair treatments available on platforms like Stylevana hair care.
| Feature Item | Product Detail |
|---|---|
| Volume | 100ml (Approx. 4-5 uses) |
| Key Ingredients | Baobab seed oil, Argan oil, Keratin |
| Primary Function | Side hair management and flattening |
| Price (KRW vs USD) | ₩18,000 / ~$13.20 |
Ingredients for Scalp Protection and Hair Cuticle Care
Modern down perm formulas prioritize scalp protection by incorporating natural oils and proteins to buffer the harshness of the chemicals. Ingredients like baobab seed oil and argan oil are included to provide moisture and prevent the hair from becoming brittle after the treatment.
The inclusion of keratin is particularly important for hair cuticle care. Since the chemical process involves opening the cuticle to change the hair's shape, the keratin helps fill in the gaps and maintain the integrity of the hair strand. While it is advertised as an ammonia-free formula, it still has a distinct chemical scent, which is common for most hair softening agents in the K-beauty market.
Key Benefits of Using a Home Kit
- Fast application: Achieve results in 10 minutes compared to an hour at the salon.
- Professional K-beauty styling at home: Mimic the sharp look of K-pop idols without the high cost.
Honest Downsides and Recommended Alternatives
The most significant downside of any DIY home perm is the potential for over-processing, which can lead to "bent" hair or chemical burns if it touches the scalp too directly. Additionally, the smell can linger for a day or two even after multiple washes.
To mitigate these issues, I always recommend applying a thin layer of skin cream around your ears and hairline before starting. If you find this specific kit too strong, you might consider the Grahfen Down Perm, which some users find slightly milder. For post-perm care, using the Mise-en-scene Perfect Serum is essential to keep the hair shiny and healthy. I have compared these side-by-side, and while DASHU is faster, Grahfen offers a slightly different comb applicator that some beginners prefer.
자주 묻는 질문
DASHU For Men Premium Fast Down Perm 10?
It is very effective in calming down the side hair that sticks out. As a top-ranking product at Olive Young, it completes a sleek, salon-level style in just 10 minutes, neatly adhering even stiff hair.
DASHU For Men Premium Fast Down Perm 10?
After shampooing, apply the contents to dry hair, press it down with a comb, and leave it on for 10 minutes. Using the enclosed perm paper will improve the effect, and then rinse with lukewarm water. It is considered an essential step in the K-beauty routine.
DASHU For Men Premium Fast Down Perm 10?
The regular price is about ₩18,000 and can be easily purchased at online and offline stores such as Olive Young. It is much cheaper than getting a down perm at a hair salon, making it cost-effective, and has the advantage of allowing you to easily groom yourself at home.
DASHU For Men Premium Fast Down Perm 10?
Baobab tree seed oil protects the hair and reduces damage. However, be careful not to exceed the recommended leave-on time of 10 minutes, as it may damage the hair, and it is safe to test it behind your ear before use.
DASHU For Men Premium Fast Down Perm 10?
The effect lasts for about 2-3 weeks. You can reapply when the side hair starts to stick out again as the hair grows, and it is practical as it is made with a 100ml capacity, allowing you to use it generously for 4-5 times or more.

Sources
Mia Yoon
Seoul-based beauty editor covering Korean skincare for international readers. Tests 300+ products per year across Olive Young and Stylevana.
