What is a texturizer? Is it permanent like a relaxer?

I stopped relaxing my hair over a year ago and it has grown tremendously. Although I have a wavy grade of hair, the hair around my temple is a little more tightly curled. I would like to balance out the waves and was considering a texturizer. My current hair regiment consists of washing my hair with Dubar Vitika Conditioning Shampoo and I also untilize their Coconut Oil regularly. Additionally, I use a Pantene's Relaxed and Natural Deep Conditioner about once a week. I really want to know the true effects if I use a texturizer. I know it's a chemical but I just don't want to put too harsh of a chemical on my hair. I just want a little easier maintanence. I do not like gels or anything hard on my hair so that is never an option for me. Please advise and thanks in advance.