Often gels are called "shellac," but the two aren’t necessarily interchangeable. Shellac is usually a trademark of CND, the creators of gel engineering. Visualize it a tiny bit like “jacuzzi” and “very hot tub,” the previous referring to the trademark brand name and the latter into a kind of merchandise. https://bookmarkspedia.com/story3488222/the-definitive-guide-to-gel-remover