How to Make Water Slime Without Borax

Water slime is a glossy, often translucent slime made by adding water to a glue-based slime recipe. The water makes the mixture looser and can help create a clear, watery look, but too much will stop it from holding together. This method uses baking soda and saline contact lens solution rather than a bottle of borax powder. It is a craft, not a toy for children who may put materials in their mouths.

For the clearest result, start with clear washable PVA school glue and let the finished slime rest in a sealed container so bubbles can settle. A small amount of food coloring is optional. Read the labels before starting: saline solution needs an ingredient such as boric acid or sodium borate to work as an activator; plain saline or multipurpose solution may not.

What You’ll Need

1/2 cup (about 120 milliliters) clear washable PVA school glue
2 tablespoons room-temperature water, with a little extra available only if needed
1/4 teaspoon baking soda
1 to 2 tablespoons saline contact lens solution that lists boric acid or sodium borate
A bowl and spoon or craft stick
An airtight container for storage
Optional: a few drops of food coloring or a small amount of washable glitter

Measurements are a starting point, not a guarantee: glue brands and saline formulas vary. Use washable school glue, not superglue, craft epoxy, or household adhesive. Adult supervision is recommended, and anyone handling the ingredients should wash their hands afterward. Keep all materials away from eyes and mouths. Do not use contact lens solution in eyes as part of this activity; it is only a slime ingredient.

Step-by-Step

Prepare the workspace. Cover the table with a washable mat or paper, gather the ingredients, and keep the slime away from clothing, carpets, and upholstery. An adult should handle the contact lens solution for young children. Check the saline label for boric acid or sodium borate before measuring it.
Measure the glue. Pour 1/2 cup of clear washable glue into a clean bowl. Scrape the measuring cup so you have a reasonably consistent amount; a large change in the glue-to-water ratio can make the slime too stiff or too runny.
Stir in the water. Add 2 tablespoons of room-temperature water and mix slowly until the glue looks evenly loosened. Avoid pouring in a large splash. If you want colored slime, mix in just a few drops of food coloring now, before the activator goes in.
Add baking soda. Sprinkle in 1/4 teaspoon baking soda and stir until no dry pockets remain. It helps the mixture respond to the saline activator. Adding a lot more does not make better slime and can leave it grainy or overly firm.
Activate gradually. Add 1 teaspoon of the qualifying saline solution and stir thoroughly. Continue adding it in small increments, stirring after each one. The glue should begin pulling away from the bowl and gathering around the spoon. Depending on the glue and solution, the mixture may need up to 1 or 2 tablespoons in total; do not add the full amount automatically.
Knead when it gathers. Once stirring becomes difficult and the slime forms one mass, lift it out and knead it slowly with clean hands. If it is very sticky, add a few drops of saline solution, knead, and wait before adding more. A little tackiness is normal at first.
Check the texture. Stretch the slime gently. It should pull into a strand and settle back together rather than pour like liquid or snap immediately. If it is too firm, work in a few drops of water or a tiny dab of glue, then knead. Make only one small adjustment at a time.
Let bubbles settle. Put the slime in an airtight container and leave it undisturbed for several hours or overnight. Clear glue often looks cloudy from trapped air at first; resting can make it clearer. Keep it covered so it does not dry out.

Common Mistakes

Adding too much water: Water thins the glue, but it does not activate it. If you add more than the measured amount, the slime may stay sticky or separate. Start with 2 tablespoons and resist adding extra water to make it seem more “watery.”

Using the wrong solution: Plain saline without boric acid or sodium borate may not form slime. Check the active ingredients instead of relying on the words “saline” or “contact solution” on the front label. Different formulas also vary in strength, so the recipe needs gradual adjustment.

Pouring in all the activator: Too much saline can make slime rubbery, stringy, or brittle. Stir and assess after every small addition. The amount needed depends on the materials, so texture is a more useful guide than forcing the recipe to use a set total.

Expecting instant clarity: Mixing traps air, creating bubbles that make clear slime look cloudy. More stirring will not necessarily fix that and may trap still more air. Seal it and allow it to rest.

Using unsuitable materials: Strong adhesives, cleaning products, and unmeasured household chemicals are not substitutes for washable school glue and the stated activator. Do not combine slime ingredients with other cleaners or chemicals.

Tips

Use a clear bowl and spoon if you want to watch the texture change, and mix slowly to reduce bubbles.
For a watery look, make a small batch first and use the recommended water amount; a loose, glossy appearance is different from slime that cannot hold together.
Use only a small amount of coloring. Dark or opaque additions can hide the translucent effect.
Keep the slime in a labeled, sealed container and wash hands and the work surface after the activity. Do not let children eat or taste it.
Discard slime that becomes dirty, develops an unusual odor, or has been shared between children. Do not pour a large quantity down a drain; scrape it into household trash.

Troubleshooting

It is still liquid: First check whether the saline contains boric acid or sodium borate. If it does, add another small amount—about 1/2 teaspoon—stir well, and repeat only if needed. If the solution has no listed activating ingredient, use a suitable product rather than adding random chemicals.

It is sticky on your hands: Knead it for a minute before deciding it needs more activator. If it remains too sticky to handle, add a few drops of qualifying saline, knead again, and pause. Overcorrecting can make it hard and breakable.

It feels stiff or snaps: It may have too much activator. Knead in a tiny dab of clear glue or a few drops of water. Let the change blend in before adjusting again; a large addition can make the texture uneven.

It separates or has watery liquid: The mix may have too much water or not enough activation. Stir it back together and add qualifying saline in very small increments. If it remains separated after careful mixing, the glue or solution may be unsuitable; starting a fresh, small batch is often simpler.

It is cloudy: If it is newly made, trapped bubbles are the likely cause. Seal it and leave it alone to rest. Glitter, color, or opaque glue will also prevent a fully transparent result.

It dries out: Store it airtight between play sessions. If it has become hard or crumbly, do not add a lot of water at once; a few drops may soften it, but dried slime may not return to its original consistency.

Frequently Asked Questions

Is water slime made with only water?

No. Water thins the glue, but it does not create the stretchy structure. The glue and an appropriate activator are what make the mixture form slime.

Can I make it without contact lens solution?

This recipe depends on saline contact lens solution containing boric acid or sodium borate. Without an appropriate activator, this specific method will not reliably form slime. Do not substitute bleach, detergent, or other cleaning chemicals.

Can I use hot water?

Use room-temperature water. Hot water is unnecessary and may make mixing less predictable; it can also create a burn risk for children.

Why is my clear slime cloudy?

Air bubbles from mixing commonly make new slime look cloudy. Leave it sealed and undisturbed for several hours or overnight. Colored ingredients and glitter can also make it less transparent.

How should I store water slime?

Keep it in a clean, airtight container at room temperature and wash hands before and after handling. Discard it if it becomes dirty, smells unusual, or is no longer in good condition; never eat it.

Is this recipe safe for young children?

It requires adult supervision because glue and contact lens solution are not edible and should be kept away from eyes. Do not use it with children who may put slime or its ingredients in their mouths, and follow each product label.

Further reading: American Chemical Society. Details can change, so check the official page for anything that matters to you. Spotted a mistake? Tell us. How we write an answer.