The best slime ever!

We’ve just made the best slime ever…..and it smells amazing!

This slime is so easy to make!

Here at Sciencedipity we help kids make a lot of slime. Whether it be at a school chemistry workshop, a fun community event or a birthday party, we have literally made 1000s of pots of slime with kids.

We experiment a fair amount with different slime recipes, but this recipe is so fab, it really is our best slime ever. We’re so happy about our new slime that we’ve just got to tell you about it!

This slime is

  • amazingly soft and light.
  • super stretchy.
  • smells devine.
  • smells amazing.
  • is sublime!!

This slime is made using our standard recipe but with hair mousse added, which make it so soft and makes it smell great!

Its so easy to make (as our video shows) and here’s how we did it together with tips on the best glue and things you need to know about borax.

Materials used

Large bowl and something to stir with
PVA glue (see Lab Notes below)
Hair mousse
Food colouring
Activator – we use home-made Borax solution (see Lab Notes below)
Covering for table
Airtight box to store slime

Our method

  • We poured about 200ml of PVA glue (see Lab Notes below) into the bowl and added a large squirt of hair mousse.
  • We stirred this really, really well.
  • Next we added a few drops of food colouring, and stirred this in.
  • Then we added the Activator (see Lab Notes below), a little at a time, and again stirred really well.
  • The slime started to form immediately, this is polymerisation reaction of the polyvinyl acetate (PVA) in the glue. But we really needed to feel the slime in our hands to determine if we needed to add some more Activator. So, we started to touch and squidge it. As it felt too sticky we added a squirt of Activator. We kept kneading and squidging, and adding more Activator, until it was perfect!
  • The amount of Activator used is down to preference – if you like yours sticky or runny, don’t add loads of Activator, if you want it slightly rubbery, add more Activator. However, if you add too much Activator you end up with a friable putty that doesn’t stretch, but we found with this mousse-y recipe that didn’t happen. Bonus!

Watch the video to see how easy it is to make:



Lab notes

UK vs USA Slime
Avoid watching American videos on slime making as they use ingredients readily available over there (e.g. Elmers Glue). You can buy these items here in the UK, but they are not easy to find, are expensive and you don’t need to bother with all that!

PVA glue
Not all PVA glues work, avoid the ones in the DIY section. We’ve had success with PVA craft glue from the well known UK shop, The Works, and from Baker Ross.

At Sciencedipity we make our own Activator using borax. We make a weak solution 2.5% borax which is safe to use. Borax’s scientific name is sodium tetraborate and nothing works better or is as cost effective as a solution of sodium tetraborate, and so we avoid the alternatives. For example, some recipes suggest using contact lens cleaner that contains boric acid or sodium borate (these contact lens cleaner are sometimes referred to as just “saline”), some say use a starch solution, the kind for spraying on shirts when you’re ironing them, again it needs to contain boric acid or sodium borate.

You may have heard about safety concerns about borax, and if you want to use and make your own borax solution, it’s down to you to get informed about the safety issues and make a decision based on the evidence. In the UK the raw material (sodium tetraborate) is classified as toxic, but a weak solution, e.g. 2.5% is of low hazard. At Sciencedipity, we wear Personal Protective Equipment when making up a solution of sodium tetraborate, and we make it up away from others. We keep the raw material out of reach of children and pregnant women. In case you were wondering, in America borax is readily available to buy in shops as a laundry supplement as it’s not classified as toxic over there!

Want more slime recipes?

Colour-changing thermochromic slime
Magnetic slime
Fluorescent/Hallowe’en slime
Fluffy slime

If you tackle this activity at home you do so at your own risk. If you have as much fun as we did, feel free to share your pictures with us on Facebook.

Have fun sliming!
Bye for now


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