Recipe · Avalanche

Avalanche slime: two layers that slowly flow together

Avalanche slime: a white layer set on top of a colored clear slime, which sinks and flows down over a few days. The recipe, how to fill the jar, and patience.

By the Slime & Co editorial team · Updated October 18, 2026

DifficultyEasy
Time20 min + 1 day
Makes1 jar
Recommended ageAges 6+, with an adult

Avalanche slime is a slime to watch before it’s a slime to squish: you press a colored clear slime into the bottom of a jar, set a white slime on top, and wait. Over a day or more, the white sinks and flows into the color, drawing waves, like an avalanche in slow motion.

You’ll need to make two batches: one with clear glue, one with white glue.

Ingredients

Batch 1: ½ cup (120 ml) clear PVA glue, ½ cup (120 ml) water, food coloring and glitter, ¼ to ½ tsp (1.25 to 2.5 ml) baking soda, 1 tbsp (15 ml) contact lens solution (boric acid + sodium borate)
Batch 2: the same amounts with white PVA school glue, no food coloring

Supplies: two bowls, a clear jar with a lid.

Why these ingredients? What the activator does and which glue to choose.

Steps

Make the clear batch: glue and water, food coloring and glitter, baking soda, then the solution poured in by an adult. Knead.
Make the white batch the same way, without food coloring.
Press the clear slime into the bottom of the jar, nice and flat.
Set the white slime on top, without mixing.
Close the jar and leave it still: the avalanche starts within a few hours and is easy to see after about 24 hours.

How do you know it worked?

After a day, the white has started to sink, drawing drips and streams through the color. In a big bowl, the effect can take several days. Afterward, you can mix it all together: you get a pastel slime.

The most common slime fails

Nothing moves: The slimes are too firm. Wait longer; next time, use a little less activator.
It all mixed at once: The top slime was too heavy or too soft. Press the bottom layer down firmly.
The avalanche is barely moving: In a big bowl, the slime can take several days to sink (it’s faster in a small jar). Keep it closed, don’t move it, and check on it every day.

Another problem? The Slime Fixer goes through every symptom.