Question: what is a good substitute for borax when making slime?
Answer: Borax Alternative for Making Slime. If you prefer not to let your kids mix up slime using powdered detergent, contact lens solution containing boric acid makes a good Borax substitute, when combined with baking soda and glue. (Note: Most liquid laundry detergents in recipes for “Borax-free” slime contain Borax.)