Do curly hair products work for wavy hair?

Absolutely.

As far as “apply to your hair” products (that is, products that don’t change the chemical composition and/or shape of your hair) go, there are only a few kinds. The ones for “curly hair” will generally be a clarifying shampoo (strips everything off to give body), a light conditioner, and products that shrink as they dry, so as to glue down flyaways and tighten a curl.

They, unfortunately, will not curl your hair if it isn’t curly, but it will help (a little) to hold a curl if you’re heat-styling.

Most definitely, used to go to Rite Aid and experiment all the time with their hair products.