How do you make slime with glue, water and Borax? Slime is made after a chemical reaction occurs between two main ingredients; polyvinyl alcohol and borate ion. Glue contains polyvinyl acetates (PVAC) molecules. These are long polymers that are like long strands of spaghetti tangled together on your plate. The Borax (borate ions)hook these together so they don’t flow so well and begin to act more like a solid and their viscosity increases.

During the slime lab students learned that increasing the amount of water in their slime mixture helped it flow better, while increasing the amount of Borax made the slime firmer.