Direct answer: For the named K18 leave-in mask, the four-minute wait occurs after application and before combing or styling; it is not a four-minute rinse-off instruction. Use the actual product directions rather than transferring the sequence from another mask.
Source and applicable scope
The K18 50 mL product page instructs shampooing without conditioning first, towel drying, application, a four-minute wait and no rinsing out. It permits other products after that wait. We are reporting the brand’s sequence for this SKU, not independently confirming its repair or performance claims. K18 — 50 mL leave-in molecular repair hair mask directions.
A practical record
| Record | What to capture | What it does not establish |
|---|---|---|
| Identity | Exact leave-in mask and pack directions | Any product called a hair mask |
| Before application | The named product’s preparation sequence | Another conditioner’s sequence |
| Timing | Wait after application, before the next step | A promised result measured by us |
| Afterward | No-rinse direction and permitted next products | A rinse-off treatment |
How to check the details
- Confirm that the product is the leave-in mask, not an oil, conditioner or professional product with different directions.
- Read the preparation instructions on the actual pack and current product page.
- Place the waiting interval at the point indicated instead of counting it during shampooing.
- Keep observations separate from expectations; seek product-specific advice for an unclear instruction or reaction.
Example and editorial limits
A salon handover note might record the product identity, application time and time the next styling step began. Those entries show what was done; they do not prove repair, diagnose hair damage or guarantee suitability. We have not used the product or verified the brand’s clinical claims. Our editorial preference is an accurate sequence with explicit product scope. Combining several treatments needs their own instructions rather than a timing rule copied from this single example.
Editorial note: Sources checked on 9 October 2026. Tables and examples are editorial synthesis. No product tests, salon visits, customer results or disposal audits were conducted for this article.
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