Acrylic Gloss Gel Medium for Paint by Numbers: The Ultimate Guide (2026)

Want to make your paint by numbers projects look even better? Many artists and hobbyists use acrylic gloss gel medium to blend colors more smoothly, get richer shades, work for longer, and add a glossy finish that protects your artwork.

This 2026 guide shows you everything you need to know about using acrylic gloss gel medium for paint by numbers. You'll learn what it is, how it works, step-by-step techniques, beginner tips, and how to pick the right product.

What Is Acrylic Gloss Gel Medium?

Acrylic gloss gel medium, sometimes called acrylic gloss medium or gloss gel, is a clear, thick, water-based product made to work with acrylic paints. It is not a varnish, but it can be used as a topcoat. Its main purpose is to change the paint's texture and finish without weakening it.

Key properties of gloss gel medium include:

• Increases gloss and transparency
• Extends drying time (open time)
• Improves flow and workability
• Adds body and texture without thinning pigment strength
• Dries clear and flexible
• Enhances color vibrancy and depth

Unlike water alone, which can weaken paint films, acrylic gloss gel medium maintains the strength and adhesion of your acrylics while giving them an oil-paint-like quality.

This medium is popular for paint by numbers because it solves two common problems: acrylics that dry too quickly and wanting a polished, finished look.

Why Use Acrylic Gloss Gel Medium for Paint by Numbers?

Most paint by numbers kits use acrylic paints that dry quickly. This can make blending hard and sometimes leaves your painting looking flat. Gloss gel medium helps fix these problems in several ways:

Top Benefits

• Better Blending & Gradients — Slows drying time, letting you blend colors seamlessly for skies, water, skin tones, and backgrounds.
• Smoother Application — Improves paint flow and brush strokes, reducing visible brush marks and making it easier to cover numbers cleanly.
• Extended Working Time — Gives you more time to work on intricate details and wet-on-wet techniques.
• Professional Glossy Finish — Adds a beautiful shine that makes colors pop and gives your artwork a high-end look.
• Increased Paint Volume — Stretch your limited paint pots further, saving money on large projects.
• Protection — When used as a topcoat, it protects against dust, fingerprints, UV damage, and minor scratches.
• Vibrant Colors — Enhances depth and saturation without altering the original hues.

Many people who do paint by numbers say their finished pieces look like real oil paintings after using gloss gel medium.

How to Use Acrylic Gloss Gel Medium: Two Main Methods

Hobbyists and artists usually use gloss gel medium with paint by numbers in two main ways:

1. Mixing with Paint (Recommended for Blending)

This is the most common and powerful technique.

Step-by-Step Instructions:

1. Complete your painting first or work in sections. Allow base layers to dry if needed.
2. On your palette (or a separate mixing dish), squeeze out a small amount of acrylic paint.
3. Add a small amount of gloss gel medium. Start conservatively:
   • Beginner ratio: 1 part gloss gel medium to 2–4 parts paint (about 20–30% medium).
   • For greater transparency and flow: up to a 1:1 ratio.
4. Mix thoroughly with a palette knife or brush until smooth and uniform.
5. Test on a scrap piece of canvas or paper to check consistency and drying time.
6. Apply to your canvas as normal. The paint will now blend more easily and remain workable longer.

Pro Tip: Mix only what you need for one section at a time. Keep lids on your paint pots to prevent them from drying out.

2. Applying as a Protective Topcoat / Varnish

Once your entire paint by numbers canvas is completely dry (usually 24–48 hours after finishing), apply a thin layer of gloss gel medium as a sealant.

Step-by-Step Instructions:

1. Ensure the painting is fully dry — no tackiness.
2. Shake or stir the gloss gel medium gently if it has separated.
3. Use a clean, soft brush (a flat synthetic brush works best), foam brush, or sponge.
4. Apply a very thin, even layer across the entire surface. Work in one direction or use cross-hatching.
5. Avoid thick applications—they can dry cloudy or leave brush marks.
6. Let dry completely (1–2 hours for thin layers; longer for thicker ones).
7. Optional: Apply a second thin coat for extra protection and shine after the first layer dries.

Coverage estimate: One 60ml jar typically covers a standard 40×50 cm (16×20 inch) painting.

Advanced Techniques with Gloss Gel Medium

• Glazing: Mix a small amount of paint with a larger portion of gloss gel (1:4 or higher) to create translucent layers for depth and shadows.
• Impasto Effects: Use more gel to build texture in areas like flowers or clouds.
• Wet-on-Wet Blending: Mix medium into two adjacent colors and blend while wet for soft transitions.
• Sealing + Protection: After topcoating, your piece is ready to hang or frame without additional varnishing.

Tips & Best Practices for Best Results

• Always test on a scrap before applying to your main canvas.
• Work in a well-ventilated area.
• Use high-quality brushes for smooth application.
• Store your gloss gel medium tightly sealed in a cool, dry place.
• Avoid excessive medium — too much can make the paint too transparent or slow drying.
• For matte lovers: Look for a matte gel medium instead (or mix gloss and matte).
• Clean brushes immediately with soap and water.
• If your kit paints are very thick, a tiny bit of gloss gel can revive them.

Common Mistakes to Avoid:

• Adding too much medium (weakens opacity)
• Applying the topcoat before the paint is dry
• Using a dirty brush (causes streaks)
• Overworking the topcoat layer

How to Choose the Best Acrylic Gloss Gel Medium

When shopping for gloss gel medium for paint by numbers, look for:

• Artist-grade or high-quality hobby formulations (avoid cheap craft glues)
• Clear drying (no yellowing)
• Non-toxic and low-odor
• 60ml or 120ml sizes (60ml is great for beginners)
• Compatible with acrylic paints

Popular options in 2026 include Canvas by Numbers, Craftoria, Paint by Canvas, and Golden (professional-grade).

Price range: Expect to pay $10–$25 USD for a 60ml jar, depending on brand and retailer.

Frequently Asked Questions (FAQs)

Can I use gloss gel medium with any paint by numbers kit?
Yes! It works with virtually all acrylic-based paint by numbers kits.

Does gloss gel medium change the color of the paint?
No. It dries completely clear and actually enhances color vibrancy.

How long does it take to dry?
Mixed paint: similar or slightly longer than regular acrylics. Topcoat: 1–4 hours depending on thickness and humidity.

Can I use it on diamond painting or other crafts?
It's formulated for acrylic paint. It can sometimes work as an adhesive, but stick to paint by numbers projects.

Is it the same as varnish?
Close, but gloss gel is more flexible and paint-modifying. Many artists use it as a final protective layer instead of traditional varnish.

Can I thin it with water?
Yes, but sparingly. Too much water can reduce effectiveness.

Will it make my painting look shiny like oil paint?
Yes — that's exactly one of its main benefits.

Conclusion

AAcrylic gloss gel medium is a great addition to your paint by numbers hobby. Whether you're blending colors for the first time or adding a shiny, protective finish, this versatile medium can really improve your results.

Try starting with a 60ml jar and experiment with different mixing ratios. You'll soon see why so many artists love using it.

Want to give it a try? Pick up a bottle of acrylic gloss gel medium and see how it can make your next paint by numbers project stand out.

Pro Tip: Pair it with good lighting, patience, and quality brushes for the absolute best outcome.