Hairspray, hair gel, or other styling product can represent: Support.
Something or someone (a tool, catalyst, person, etc.) who supports or helps you accomplish what you want.
Something or someone who provides structure or a framework.
For more clues, consider the particular product, its role, context, and characteristics.
For example, hairspray might represent a wish to keep something the same, make something last, or put something “on hold.” See also: Hair, Controlling, Organizing
[1]