How do I make slime without boron

Mixing fluffy slime in a bowl.

Remember Fidget Spinners? They lasted for about 2 weeks last year and now nobody would be seen dead with one. But Slime? It was huge in 2017 and is probably still just as big this year.
The good thing about it is that it’s pretty easy to make at home. In fact, it’s probably better to make it at home, because shop bought slime can contain a chemical called Boron.

Investigation by Which?

In 2018 the consumer watchdog, Which?, investigated 11 different pre-made packets of Slime. Eight of them were found to contain higher levels of Boron than is allowed by EU safety laws. Boron is often used to make the Slime sticky, but boron can cause skin irritation, stomach cramps, sickness and diarrhoea,

Homemade Slime

The good news is that it’s easy to make slime at home without using Boron. However, most “boron-free” recipes that I’ve seen on the internet still use boron. After extensive research, I found that most boron-free recipes include contact lens solution or liquid laundry detergent. Checking the ingredients for these, either on the labels or on the websites, you will find that many of these solutions contain Boron, Borax or “Sodium Tetraborate Decahydrate”. They are all basically Boron and should be avoided in slime that children use.

We have managed to find some actual boron-free slime recipes. They make “fluffy” slime. This is almost like dough — it’s quite airy.

Fluffy slime recipe


This is a very simple recipe, which can be changed to make different types of fluffy slime. If you add more water you will get a wetter, more stretchy slime. You can add glitter or food colouring to change how it looks too.

All you need is shampoo — any shampoo should work but we’ve found that the thicker your shampoo is, the better your slime will be. You also need cornflour.

Here’s how to make it:

  1. Mix 125ml of shampoo and 30g cup of cornflour in a bowl.
  2. Add 3 drops of food colouring (optional).
  3. Add 1 tablespoon of water and stir. Slowly add 5 more tablespoons of water, stirring well after each one.
  4. Knead the slime for around 5 minutes.

Knead for 5 minutes

If, after 5 minutes of kneading, your slime is still sticky, then add more cornflour and knead it in. You should be able to get a good consistency.

The best part of making your own slime is that the fun starts as soon as the shampoo hits the bowl. Your children will probably enjoy making the slime as much as they enjoy playing with it. So even if your first batch isn’t perfect, just try again.
For me, I only needed to add 30g of cornflour in order to get the right consistency. But I’ve heard from some people that you need up to 60g. I think that things like the temperature of the room, the humidity or maybe even the brand of cornflour might make a difference. All I can say is that creating something with your children will be great, so just get stuck in and experiment 🙂
As long as you end up with a semi-hard, semi-stretchy, moist, light, almost dough-like slime, you did the recipe right. The next recipe has a similar consistency.

Fluffy volcano slime recipe





Volcano slime when it is still slightly warm.

This slime is called volcano slime because it reacts to heat. Once it has been made, you can microwave it for up to 20 seconds. This changes the texture and makes it a lot softer, almost like lava. This is temporary because once it cools it changes back to standard fluffy slime. It’s probably best that this slime is always made under adult supervision. It should only be heated in the microwave for a few seconds.
You only need white school glue (Elmers brand is the best for slime) and cornflour for fluffy volcano slime. Here’s how to make it:

  1. Pour 60ml Elmer’s white school glue and 60g of cornflour into a bowl.
  2. Add 3 drops of food colouring (optional).
  3. Mix it well.
  4. Knead it with your hands for 10 minutes.
  5. Heat it in the microwave for 20 seconds.
  6. Let it cool, then knead it for another 10 minutes.

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