The original slime or DIY slime contains polyvinyl alcohol (PVA), borax (sodium tetraborate), and water. If borax is dissolved in water, boric acid is formed, which reacts further to tetrahydroxyborate. ... This makes the slime really slimy.

How do you make slime activator?

A simple and effective baking soda slime activator you can make is four pinches (about 1/2 tsp.) of pure baking soda and 3 tablespoons of multi-purpose contact lens solution. This amount is just right to mix with a 4-6-ounce bottle of glue. In addition, baking soda can help rescue slime that has gone wrong.

What ingredient in slime makes it stretchy?

The science behind slime:

PVA glue has an ingredient called polyvinyl acetate, which is a liquid polymer. The borax links the polyvinyl acetate molecules to each other, which creates one large, flexible polymer, aka slime! Elmer's Glue seems to have the right amount of polymer that not all pva glues have.