Yes, the product is designed to fit into a post-wash routine before blow-drying, and it can also be applied to dry lengths before styling. The formula contains Polysilicone-29, which forms a very light film on the hair surface and helps the strands feel smoother and better shielded during heat styling. That film can reduce friction and make the hair easier to manage with a hairdryer, straightener or curling tool.
However, it is important to be precise about what this means. The product is not described as a dedicated heat protectant with a stated temperature rating. If you regularly use very hot tools, it is safer to use a product specifically labelled as a heat protectant, or to keep the tool temperature moderate and limit passes over the same section. The spray can be part of your pre-styling routine, but it should not be your only line of defence against heat damage.
For best results, apply the spray to damp hair before blow-drying, or to dry hair before straightening or curling. Use a small amount first, especially on fine hair, and distribute it evenly so the film is not concentrated in one area. Avoid spraying into the eyes, and do not overapply, as too much leave-in product can make hair feel coated rather than shiny.