If the K18 mask doesn’t rinse out, why do I have to keep using it?Updated 2 years ago

We recommend you keep using the K18 mask because damage is ongoing, so your repair should be ongoing too. Our molecular repair technology delivers progressive results that rebuild hair strength each time you use it. That’s why we say to use the K18 mask for 4-6 washes, so your healthy hair results get better with continued use.