A simple borax-free slime activator is usually made with contact lens solution and baking soda. Another common option is liquid starch , which can also activate glue into slime.
Easy borax-free activator
Use this if you want a homemade mix:
- Put 1/2 cup warm water in a bowl.
- Stir in 1/2 cup contact lens solution that contains boric acid.
- Add 1/4 cup baking soda and mix until smooth.
- Shake before each use, then add it slowly to glue until slime forms.
Simpler alternative
If you already have liquid starch, mix it with white glue a little at a time until the texture turns stretchy and thick. This is one of the easiest no- borax slime methods.
What to avoid
- Don’t expect baking soda and water alone to make stretchy slime; that mix is more like oobleck-style goo, not true slime.
- Check that your contact solution lists boric acid or a similar ingredient, since that is what helps activate the glue.
Safety note
Keep slime ingredients away from food and label the container clearly so it isn’t mistaken for something edible.
TL;DR: The best borax-free activator is usually contact lens solution + baking soda + water , or just liquid starch with glue.