A paint by numbers session often ends before the canvas does. You may have a few colors left open while you answer a call, clean a brush, or decide where to stop for the evening. Acrylic paint starts to dry when exposed to air, so the useful habit is simple: open only the colors you need, close each pot firmly, and keep the rim clean.

This guide covers practical storage between sessions. It does not promise a fixed shelf life for every kit. Paint formulas, containers, room conditions, and how often a pot is opened can all differ. If a pot arrives damaged, leaks, or seems unusable, check the product listing and contact the seller instead of trying to alter the rest of the set.

Why paint pots dry out

Acrylic paint is water-based. When a small amount is left exposed, water evaporates and the paint thickens; a pot with a loose lid has more exposure than one that is cleanly closed. Dried paint can also form around the rim or threads, preventing a lid from sealing evenly. Dust, brush fibers, or rinse water introduced into a pot can change the paint and make storage less predictable.

These are general acrylic-paint handling principles, not a claim about the exact formula or guaranteed storage life of every Creovia paint pot. Liquitex advises keeping containers tightly closed and storing materials under suitable conditions; Golden Artist Colors also recommends cleaning the container rim and threads before closing. Follow any care directions supplied with your own kit.

A short routine before you pause

1. Open only the colors you are using

Keep unopened colors closed while you work. If your canvas uses several shades in one area, take out only those pots and return them to the tray as soon as you finish with each color. On a longer session, close the lid during breaks rather than leaving every pot open beside the canvas.

2. Keep the rim and lid threads clean

Before closing a pot, check the edge for paint. Wipe fresh paint from the rim and the inside of the lid with a clean, slightly damp cloth or disposable towel. Avoid pushing lint into the paint. A clean edge lets the lid sit more evenly and reduces the chance that dried residue will hold it open.

3. Close firmly and store upright

Press or screw the lid fully closed according to the container design. Do not overtighten a cap that is not made for force; the goal is a secure seal, not a damaged lid. Place pots upright in their organizer or a stable box, away from direct sunlight, heaters, and unusually hot areas. A level shelf at ordinary room temperature is usually more practical than a windowsill or a car.

4. Keep water and mixed paint out of the original pot

Use a small palette or a separate dish when you want to thin a dab for easier brush flow. Do not pour leftover paint mixed with water, medium, or rinse residue back into its original pot. Water and contaminants can affect stored paint. Use a clean brush for each color, and remove excess paint from the brush before rinsing it.

What to do during a longer break

If you are stopping for the night, cap every color, check that the canvas is protected from dust, and put brushes aside for cleaning. A damp cloth over the work surface is not a substitute for closing paint containers. If you expect to be away for several days, store the kit together so colors remain identifiable, and avoid leaving opened pots on the canvas or near a sunny window.

For instructions on organizing the rest of a project, read our paint by numbers canvas storage guide and our guide to cleaning paint by numbers brushes. Before starting, check what is included in a current paint by numbers kit. Creovia’s Curly Lamb in a Wildflower Meadow kit listing identifies its paint-by-numbers format and available options; check the live listing for current details and availability.

If the paint has already thickened

First check whether the paint is merely thicker than usual or has become a solid, dry mass. Do not assume that adding water will restore a dried pot: it may not return to a usable or consistent condition. Avoid adding water directly to the whole container, especially if you do not know the paint formula. Contact the seller with the product name and a clear photo if a new pot seems defective, has separated unusually, or cannot be used as supplied. Keep the remaining colors closed while you wait for guidance.

For general background, see Liquitex’s acrylic paint storage and safety guidance and Golden Artist Colors’ article on acrylic paint storage. These sources discuss their own materials and general handling; they do not establish the shelf life of a Creovia kit.

Frequently asked questions