For longer hair, more product may be required, but err on the side of caution to avoid looking sticky or slick.
Compressed hair is perfect for traditional, Hollywood-style slick backs. Volumized hair is perfect for non-traditional slick backs like pompadours and undercuts.
For a more modern look, shave this side of your head to create a hard part. [5] X Research source
For some styles, like comb overs, use hair spray instead of gel or matte to achieve a slightly glossy look.
For small spikes, use a fine-toothed or jagged comb. For large spikes, use a wide-toothed comb.