Hair Treatment Recommendations

I'm using a protein treatment from Park Joon Beauty Lab. I bought the large size and have been using it generously, and I think it's good. However, no matter which product you use, I think you need to wait a sufficient amount of time after applying the treatment before rinsing it off. So, I can't do it often, but since I do it at least twice a week, I've definitely noticed my hair getting better.