Natural gums such as the goma de guar are polysaccharides made up of glucose and mannose groups. Their preparation process involves refining plants parts such as the seed and the bark. latexes are extracted as liquids from plants which are heated or boiled to achieve the required thickness. Synthetic gums and resins are on the other hand prepared through a chemical mixing process. Get high quality Goma De Guar from Agro Gums.