Recipe · No glue
Psyllium fiber slime (no glue, no borax)
A stretchy slime with no glue and no boron, made from psyllium fiber powder and water and cooked in the microwave by an adult: amounts, times, and safety.
- DifficultyMedium
- Time10 min + 20 min in the fridge
- Makes1 ball
- Recommended ageAges 6+, an adult does the cooking
Psyllium fiber powder, mixed with water and heated, forms a super-stretchy gel. The result: a slime that pulls into long strings, with no glue and no activator, so no boron. The original recipe uses a brand-name fiber supplement; here we simply call it psyllium fiber powder, which you’ll find in the fiber supplement aisle of drugstores and supermarkets.
Microwaving produces a scalding hot liquid: an adult handles it until it has cooled completely.
Ingredients
- 4 tbsp (60 ml) psyllium fiber powder
- 2 cups (480 ml) water
- Food coloring (optional)
Supplies: a large microwave-safe bowl, a spoon, a baking sheet or a plate.
Steps
- An adult mixes the powder and water in the bowl (plus the food coloring).
- The adult microwaves it for 3 minutes on full power, stirs, then heats it for 1 more minute.
- The adult keeps stirring for up to 2 more minutes: the mixture thickens.
- The adult spreads the dough on a baking sheet and puts it in the fridge for 20 minutes.
- Once it’s cold, spread it on a plate, then play.
How do you know it worked?
Once cooled, it stretches into long strands and comes off the plate. More powder makes a more rubbery slime.
The most common slime fails
- Too runny
- Not heated enough, or not enough powder: an adult can put it back in the microwave for a minute.
- Too rubbery
- Too much powder: next time, use one tablespoon less.
How to store it
About two days, in a closed container in the fridge. Throw it out after that.
✅ I made it! Add it to my logbook
Try these too
All recipesIngredients explainedBorax-Free Slime: The Truth About Contact Solution