To seal acrylic paint for outdoor use, ensure the paint is fully cured, then apply 2-3 thin, even coats of a UV-resistant, outdoor-grade clear sealer. Let the sealant cure completely before exposing your project to the elements.
Since you used acrylic paint, I suggest using White Knight 310g Crystal Clear Acrylic Clear Gloss. It is the ideal clear topcoat to enhance and protect your craft and DIY projects. It resists cracking, yellowing and adds a protective coating over both solvent and water-based paints.
While outdoor acrylic paint is water-resistant when dry, it is highly recommended to seal it. Sealing protects the paint from severe weather conditions, prevents moisture buildup, and shields the colors from UV fading.
Yes, Mod Podge can seal acrylic paint, but the method matters. Because traditional brush-on Mod Podge is water-based, applying it with a brush directly over dried acrylic can cause the paint to smear or lift.
Yes, but only if it is specifically formulated for outdoor use and properly sealed. While water-based exterior paints hold up very well, standard acrylic craft paints or artist tubes will quickly crack, fade, and peel without protection.
Adding baking soda to acrylic paint acts as a thickening and texturizing agent, turning the paint into a thick, gritty paste with a matte finish. While great for crafts and faux-ceramic decor, it disrupts the paint’s chemical binders, which can cause cracking and peeling over time.
To make acrylic paint waterproof, apply a clear acrylic sealer or varnish. These products form a protective, moisture-resistant barrier. Popular, highly effective spray sealers include Mod Podge Clear Acrylic Sealer, Aleene's Spray Acrylic Sealer, and MTN Pro Canvas Spray Varnish.
Art / Sealing Surfaces: The best sealant to use will depend on the type of painted surface the acrylic is on. For example to seal an acrylic painting on canvas many artists use an acrylic polymer varnish. If you'll be sealing paint on a wood surface then polycrylic sealer is a good choice.
If you find that your Mod Podged item is still tacky even after drying, just use a clear acrylic spray or brush-on sealer on top. Though Mod Podge is self-sealing, the sealer gives your project an added layer of protection.
To achieve even more gloss, apply a high gloss varnish once the painting is finished and the paint is dry. There is a product by Liquitex that is both a gloss medium and varnish, so you could use it to mix with the paint as well as use it for a final coat of varnish.
October has many warm dry sunny days and although it does record the highest( not by much) average monthly rainfall, the rain is usually followed by windy autumn weather to dry things out quickly. It is therefore alright to paint outside in October. Just beware the cold nights.
To waterproof a painting for the outdoors, coat both the front and back with a heavy-duty, UV-resistant exterior sealer like a polyurethane varnish or epoxy resin. Apply 2-3 thin, even coats in a well-ventilated space, letting each layer dry completely before starting the next.
It isn't necessary to seal acrylic paintings. Some people do because they say it brings out the colors better, or they want a glossier finish than with the paint alone. I have acrylic paintings that I did 40 years ago, and they look the same as they did when I first painted them, with no sealant/varnish.
While outdoor acrylic paint is water-resistant when dry, it is highly recommended to seal it. Sealing protects the paint from severe weather conditions, prevents moisture buildup, and shields the colors from UV fading.
The best clear coats for acrylic paint are generally Liquitex Acrylic Varnish (for brushes/permanent protection) and Krylon Crystal Clear (for sprays/UV protection), as they offer non-yellowing, flexible, and archival quality protection. For maximum durability and shine, especially on pour painting or crafts, epoxy resin is recommended.
No, you should not use hairspray to seal acrylic paint.
Put a layer of Mod Podge Clear Acrylic Sealer on your finished project to seal and protect. Spray over paint, lacquer, varnish, stain, glue, wood and other porous surfaces for a protected finish. This sealer will not leave a yellow finish; it dries crystal clear and quickly.
Mod Podge does not have a 100% waterproof formula, but it offers Water Resistant and Outdoor formulas that protect against moisture, splashes, and rain. For fully waterproof results on finished crafts, top your project with a clear, waterproof acrylic sealer or enamel spray.
Polyvine Exterior Extreme Varnish is designed for outdoor decoupage and decorative finishes, sealing your work with a tough, clear finish that holds up beautifully over time. Waterproof, UV resistant, and built to withstand the elements, it's a trusted choice for planters, signs, garden décor, and more.
Mod Podge Waterbase Sealer, Glue and Finish for Outdoor (8-Ounce), CS11220 Clear Finish.
To make acrylic paint waterproof, apply a water-resistant sealer such as polyurethane, exterior-grade varnish, or specialized acrylic sealers. For best results, use products like Minwax Polycrylic, Mod Podge Water Resistant, or sprays like Krylon UV Resistant Clear to protect against moisture, UV rays, and mildew.
Keep Acrylic Paints Sealed Tightly
Always make sure to screw the caps or lids on tightly after each use. Even a small gap can cause the paint to dry out inside the container, hardening and becoming unusable.
I used to do this when i started out before I brought better quality paints (my first minis were done with $10 pack of acrylic paint in tubes from the stationary shop!). Dish soap breaks down the surface tension of water which helps it flow into cracks and crevices.
To seal acrylic paint and protect it from moisture, dust, and UV fading, use a clear acrylic varnish, Mod Podge, or a clear polyurethane sealer. Choose the right product based on your specific project and the look you want:
Yes, wet acrylic paint will easily wash off in the rain. Once completely dry, it becomes water-resistant. However, it is never 100% waterproof. Prolonged exposure to heavy rain or standing water will eventually cause the paint to soften, lift, peel, or wash away.