Sticky substances are materials that have a strong ADHESIVE quality, allowing them to stick to surfaces. Common examples of sticky substances include GOO, TAR, RESIN, GUM, TREACLE, GOOP, ADHESIVE, GLUE, and gluten. GOO is a thick, slimy substance, while TAR is a dark, viscous liquid derived from petroleum. RESIN is a natural or synthetic material with a sticky consistency, while GUM is a type of plant sap that can be chewed. TREACLE is a thick, sweet syrup made from sugar cane, while GOOP is a slang term for any sticky, slimy substance. ADHESIVE is a substance used to bind two surfaces together, while GLUE is a type of ADHESIVE made from animal byproducts. Gluten is a protein found in wheat, barley, and rye that gives dough its sticky texture.