After years of experimenting with different substances in search of the 'Holy Grail' of slime that won't break the bank, I think I've finally found it.

What you'll need:

2 litre food processor
water
Guar Gum
Xanthan Gum
Yuck
Food coloring or Tempura paint (optional)

- Start with filling the food processor to the maximum level it is meant to hold. Plug it in and have it ready to go.
- Add the food coloring or Tempura paint and give it a spin to see if the shade and degree of color is what you want.
- Add about a tablespoon of Yuck powder. (availability is at the end of this post) Sprinkle it around, because it will want to form lumps that take a very long while to dissolve. Give the processor another spin to ensure it is evenly dispersed. You might want to put the lid on if it's too splashy.
- These next two steps should be done quickly. Add three heaping tablespoons of guar gum powder and one of xanthan gum. You can just dump the powder on top of the liquid, no need to sprinkle or spread it out. Put the lid on quickly and spin on low, then medium and finally high as the mixture thickens. You'll know it's thickening by the sound of the motor as it lowers in pitch by working harder as the liquid thickens. After just one minute, you should have heard the motor slow down a bit and it will be ready. Pour into a larger container and repeat. (Caution: NEVER try to reach inside to the bottom where the razor-sharp blades are) You can make 8 litres of this in ten minutes once you get the routine going. (that's more than 2 gallons) If you work at a steady pace, one hour will produce 48 litres or 12 gallons, which is a LOT of slime.

Availability:

You could find a working 2 litre food processor at a thrift shop or get one on Amazon, etc.
Guar Gum and Xanthan Gum: These are available in small packets at many grocery stores but you'll be paying far too much for small packaging. Instead, look for larger amounts on Amazon, etc. I get the 1kg (32 oz) size zip-lock bags on Amazon and they last a long time.

"Yuck" is a product sold online from the USA at a website called buckets-o-fun.com. Look for "Sticky Yuck Slime" which is a powder that comes in a plastic zip lock bag. Due to high postage costs, I usually place a large order every few years. It is a long chain polymer that makes anything from slimy water to thick stuff like snot. (Their marketing description, not mine!) A little goes a long way, and it should last a long time if you don't mix up a huge amount of it. Please be aware that they sell a lot of their products to church groups for summer events, so it's best not to mention wam.

Tempura Paint is available at Dollar or discount stores. Often a tiny bottle has a fair price but they have much larger bottles for just a bit more. I try to find the larger bottles but color selection is limited. It's cheaper than food coloring and this recipe is NOT to be eaten.

Safety info: Yuck is a long chain polymer, basically polyacrylic which translates to liquid plastic. Eating it is not recommended but it isn't poisonous either in small amounts. Tempura Paint is 'child friendly', meaning that some may be ingested with no harmful results. Guar Gum and Xanthan Gum are food additives, and safe to ingest. I would avoid inhaling the dust from either, as it could absorb the moisture in a person's throat and lungs. I always add the xanthan gum last and pop the processor lid on right afterwards. The only other safety concern is slipping and falling. Yuck is extremely slippery, and both gums produce a slippery texture when wet. If you're planning on filling the tub, have a shower hose hanging down so you don't need to attempt to stand up.

As in all of these recipes and suggestions, common sense is expected and I take no responsibility for accidents or injuries caused by attempting any of these ideas.

These photos are AI but illustrate what this slime looks like when more Yuck is added to the mix. I will eventually replace them with photographs of the real formula. Yuck is water-soluble if you give it enough time. If you're using a bathtub, fill it with water afterwards to dilute the yuck. Trying to just shower it away is less effective. Same rule applies to yuck on human skin. Soaking it works better than just showering it. A sponge or other friction-causing item will help it get off of skin easier, but then the sponge gets a layer of yuck on it, so it's a process that requires some patience. As with any powdered mixtures, be careful that everything going down the drain is sufficiently diluted and never put the powder down the drain as it can block pipes. Just run lots of water and everything will dissolve away.