Stick lac is a resinous substance secreted by tiny insects called lac bugs. It is highly valued for its use in various industries, particularly in the production of shellac, a type of natural polymer. Stick lac has several synonyms that describe its similar properties and uses. These include gum lac, shellac gum, and seedlac. Gum lac is the purified form of stick lac. Shellac gum is the refined version of gum lac that is used in the manufacture of varnishes, paints, and coatings. Seedlac, on the other hand, is produced from the unrefined form of stick lac and is used for making furniture polish and other similar products.