How to Make Blue Slime - Easy Recipe for Glossy Blue Slime (2025)

This super simple recipe shows you exactly how to make blue slime that’s gooey, stretchy and super satisfying to play with! It’s a perfect activity for kids, whether they’re slime beginners or seasoned pros. With its vibrant colour and shimmering finish, it’s the kind of craft that’s just as mesmerizing to look at as it is fun to squish.

Slime making is a super popular activity for a reason: it’s easy, hands-on, and doubles as a great sensory play idea. Whether you’re making it for a birthday party, a rainy afternoon, or just for fun, this blue slime is sure to be a hit with kids of all ages.

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Helpful Tips:

1. Always use fresh glue: Slime can turn out runny or clumpy if the glue is old or partially dried. For best results, use a fresh bottle.

2. Start with less activator: Add your slime activator (like contact lens solution or borax water) slowly. It’s much easier to fix slime that’s too sticky than to rescue one that’s over-activated and rubbery. Start with 2 teaspoons and then add a bit at a time from there. If you prefer a more flubbery slime you may want to add up to 2-1/2 teaspoons of activator.

3. Store your slime in an airtight container: Keep your slime in a sealed container or zip-top bag when not in use. It helps maintain its texture and prevents it from drying out.

What do I need to colour my blue slime?

We used both food coloring and mica powder to make our blue glossy slime. The mica powder gives the slime an iridescent shimmer and a bit of colour depth, which we like, but food coloring is also fine on its own.

You can also use acrylic paint or liquid watercolor paint to colour slime.

How do I fix my clear blue slime if it’s too sticky or too hard?

If your slime is too sticky, try adding a few drops of contact lens solution and knead it in slowly. Go a little at a time, since too much will make the slime rubbery!

If your slime is too hard or stiff, and breaks instead of stretches, it has too much activator in it. Knead in a tiny bit of lotion or glycerin. You can also try letting it sit in a sealed container for a few hours, since slime can soften up on its own once it’s rested for a bit.

How long will my blue slime last?

Slime usually lasts at least a week, and often even longer if it’s stored properly in an airtight container. In fact, many slimes get even better after a day or two, becoming stretchier and smoother as the ingredients fully settle.

If your blue slime starts to dry out or lose its texture, try kneading in a little warm water or lotion to bring it back to life. And be sure to throw out the slime once it looks, feels, or smells off.

Whether you’re making it with kids or just love a good sensory activity yourself, this blue slime recipe is a simple way to add a little fun to your day. Once you’ve mastered the basics, try making it in different shades or add glitter, beads, or charms for even more slime fun!

Here’s even more fun slime ideas:

Galaxy Slime

Green Slime

Rainbow Slime

Where to buy:

You can purchase Low-Mess Crafts for Kids from Amazon, or wherever books are sold:

Amazon | Barnes and Noble | Books-A-Million | Indiebound | Amazon Canada