What is Glue?
{{no sources|date=September 2024}} [[File:AdhesivesForHouseUse001.jpg|225px|thumb| There are many types of glue. ]] [[File:AdhesivesForHouseUse002.jpg|right|225px|thumb|]] {{Commonscat|Adhesives|Glue}} '''Glue''' is a [[wikt:sticky|sticky ]] [[material]] (usually a [[liquid]]) that can stick two or more things together. Glue can be made from [[plant]] or animal parts, or it can be made from oil-based [[chemical]]s. The first glues may have been natural liquids that come out of [[tree]]s when they are cut. Later, people learned to make glue by boiling animal feet, [[cartilage]] or bones. Some very strong glues were first made from fish bones, [[rubber]] or [[milk]]. A simple glue can be made at home by mixing [[wheat]], flour and water. This glue will stick pieces of paper together. Many kinds of [[art]] can be made using glue. A [[collage]] is a work of art made by using glue to stick coloured things onto [[paper]]. Some glues can be used to keep water out of [[boat]]s, [[building]]s or [[vehicle]]s. In this case, the glue may be called [[caulk]]. Some man-made [[materials]], including wood-like materials, are made using glues to bind together small pieces of material or [[powder]]s. While many glues are safe, certain kinds of glue contain strong-smelling [[chemical]]s. Some people [[sniff]] these glues to get high. Sometimes people breathe in the [[vapor]]s by mistake. This is a very bad idea because these chemicals are often [[poison]]s and may cause [[brain]] damage or [[illness]]. Glue can also be made from rice or rice flour. [[Category:Adhesives]]