Step 1- Gather materials

The main ingredient in gunge is a food thickner. There are a number of options open to you.

If you are in the UK Natrosol HR250 (often mis-spelt Natrasol) from The Basic Chemical Company (see address below) is a good material. This is the supplier the BBC have used (not sure if they still do, but I wouldn't be surprised)- You will need to buy a minimum of 1 kg of the natrosol, but this makes a good gunge.

The Basic Chemical Company (UK) Ltd
Hillbottom Road
Sands Industrial Estate
High Wycombe
HP12 4HJ
01494 450701

Ebay/ other websites
There are other suppliers that well sell you smaller quantities, either found on the web or through Ebay. Personally I don't believe these generally offer particularly good value, unless you only want to make one bucket full. It is likely (although I stand to be corrected) that these suppliers are selling on re-packaged Natrosol .

Xanthan Gum- this is sometimes available from the supermarkets (certainly Sainsburys) or health food shops as it is used as a gluten replacement.

Guar gum- another alternative that can sometimes be found in health food shops.

If you are in the US, you can use Methylcellulose (Methocel) from The Chemistry store- or Ethylcellulose from Douglas and Sturgess-

Elsewhere you may need to find a local source for one of the thickeners.

The substances used to make gunge generally have long shelf lives (normally several years) and so can be bought in larger quantities and stored if desired. Moisture is their biggest enemy, so they will need to be packaged in a well sealed container.

Possible thickeners

You will also need

powder or poster paint

Suitable container to mix in- bucket for the quantity described


Wooden spoon, whisk, paint stirrer or similar
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CreativeGeek7 months ago

Couldn't dyed instant vanilla pudding work for a sort of gunge/slime too? And there'd be no real health concerns as it would be completely edible due to being pudding and food dye and all.


Gunge fight! X3
cyan7892 years ago
baught som Natrosol 250 H4R
cant get to gel at all. is H4R the wrong stuff? on container says typical usage 0.1 to 3%.
have mixed with hot and cold water... could there be a ph issue?

Any ideas welcome
superpants (author)  cyan7892 years ago
There are a few things to try that might solve the problem. The first thing to check would be that you have been sold what you think you have bought, and also if the batch is still in date.

The most common problem I have found with Natrasol is the tendency for it to ‘drop out’ and sit on the bottom of the container and form a jelly lump. This will happen if the water is not hot enough, but won’t be apparent when you initially mix it. Once this has happened, it is very difficult to recover from. When you mix- it will look like it is dispersing, but will slowly settle out as it sits. No amount of mixing after this has happened will get it to thicken properly.

The H4R grade shouldn’t have any significant effect as far as I can tell.

Hope this helps
mamayama3 years ago
If you want to whip up a batch of "boomer bile" (from the Left4Dead game), McCormick has a neon green food color that works perfectly. We made our bile using Xanthan Gum powder 1% in water, which yields a nice, translucent, snotty looking glop (we ordinarily use Xanthan 1% as a oral suspension base in prescription compounding). If you use xanthan, allow it to hydrate overnight, then mix in a blender or with an electric mixer.
Yes zjschafer corstarch and water works very well
zjschafer3 years ago
cornstarch and water works great for this :D
superpants (author)  zjschafer3 years ago
Cornstarch and water will make a slime, but has very different properties to this. try experimenting with both!
alright! have you tried borax and glue before??
superpants (author)  zjschafer3 years ago
Yes- again the borax and glue works well, but has a different set of properties. The key advantage of this gunge and the other slime i've posted:
Is that both can be made in larger quantities cheaply.
Bard3 years ago
would cool aid work to give it color?

superpants (author)  Bard3 years ago
It probably will work, but you won't have a particularly intense or opaque colour
superpants (author) 3 years ago
If available, the powder paint tends to stain less. With the poster paint it can depend on the brand and the colour. I would therefore recommend washing any clothes before the gunge dries and only using older clothes and darker colours.

There is a full explanation on this on my website
westfw3 years ago
Be a little careful with the type of poster paint you use. Despite being water-based, some of them are surprisingly hard to wash away if you happen to let them dry. Though I'll categorically deny any personal experience!