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Air dry clay is one of my favorite crafting materials to use. I have done all sorts of projects from Air Dry Clay Faux Plant Pot, clay feather tags, an incense holder, and a pencil holder. It is quite a bit therapeautic for me to use and I just love creating new fun things I can use in my home or do with my baby girls. It’s super easy to use, requires no kiln or oven, and works beautifully for everything from ornaments to pottery-style projects.
But one of the things that happens quite often (and one most crafters tend to complain about) is cracking. Yes, cracking clay. Cracking often occurs as it air dry clay dries. Fortunately, cracking is preventable with the right techniques and care. Here’s how to keep your air dry clay from cracking but also tips on what to do if it does.
How to Repair and Fix Cracked Air Dry Clay
Cracking of air dry clay is more common than I’d care to admit. It happens. Even to experienced folks like myself. Here are some tips to avoid cracking in the first place.
If you notice small cracks forming during the drying process, theres really no point in freaking out. Again these things happens. You can fill in the cracked area by using a bit of fresh clay mixed with a small amount of water. This will allow you to slightly penetrate the cracked area and cover it.
Use your finger to them smooth out the crack. Let the repair dry slowly before sanding or painting. Trying to fix cracks after the clay is fully hardened often leads to a patchy finish. However, even after drying, you can still fix the crack by following the above steps.
The Best Way to Avoid Cracks From Happening
1. Choose the Right Clay for Your Project
Not all air dry clays behave the same way. Some brands are softer and more flexible, while others dry harder but are more prone to cracking. If you’re working on small, detailed pieces, choose a fine, smooth clay. I prefer to use Crayola Air Dry Clay. However there are so many other brands out there.
For larger or thicker sculptures, use a clay known for durability and even drying. Reading reviews or testing small batches can help you find the best fit before starting your main project.
2. Keep Your Clay Properly Conditioned
Conditioning (or kneading) your clay before use helps distribute moisture evenly. Start by working the clay in your hands for several minutes until it feels soft and pliable. If it’s too dry, lightly mist it with water and continue to knead it. Avoid adding too much water, as this can make the clay sticky and more likely to crack as it dries.
3. Build Even Thickness
Uneven thickness is one of the main causes of cracking. Thin sections dry much faster than thick ones, creating tension that pulls the clay apart. Try to keep your project around the same thickness throughout—usually between ¼ to ½ inch for most crafts.
If you need thicker parts, consider building around a lightweight core, like crumpled foil or a ball of paper, to help it dry more evenly.
4. Dry Slowly and Evenly
Try not to rush the drying process. Fast drying is literally the enemy of air dry clay. Yes, I said it. You don’t have to be in a rush when using clay. Instead of placing your project in direct sunlight, near a heater, or under a fan, let it dry slowly at room temperature. Rotate your piece occasionally so all sides dry evenly.
7. Seal and Protect Finished Pieces
Once your project is completely dry and smooth, seal it to help protect it from moisture and further cracking.
There are several types of sealants you can use, depending on your project. Epoxy resin, polyurethane varnish, and even white craft glue like Mod Podge are all great options.
This adds durability and helps prevent future issues, especially for items exposed to humidity.
8. Store Clay Properly Between Uses
Leftover clay can dry out and become unusable if not stored correctly. Keep it in an airtight container or sealed plastic bag, and store it in a cool, dark place.
You can wrap it in a damp paper towel before sealing it to maintain moisture. Proper storage keeps your clay workable.
