What Type of Paint to Use for Outdoor Murals? | Acrylic That Survives Weather

For outdoor murals in the US, 100% acrylic water-based exterior paint or a purpose-made mural acrylic is the right choice, because acrylics resist weather, hold color, bond to masonry, and clean up with water.

A bare brick wall can ruin a mural in one season if the wrong coating goes on it. The paint that survives sun, rain, and freeze-thaw cycles is acrylic — and the difference between a wall that looks sharp after five years and one that chalks and peels comes down to picking the right acrylic and preparing the surface before brush one.

Golden Artist Colors identifies its Heavy Body, MSA, Fluid, and High Flow Acrylics for mural work, and Golden Paintworks Mural & Theme Paints is a 100% acrylic waterborne coating built for exterior and interior murals. Sherwin-Williams exterior acrylic latexes are the other main route. Below are the specs that decide the outcome, the exact prep sequence, and the colors to avoid outside.

What Type of Paint Holds Up on an Outdoor Wall?

A high-quality 100% acrylic paint is the durable choice for outdoor murals, and purpose-made mural acrylics are formulated for exactly this job. Golden describes acrylics as durable, weather-resistant, and lightfast, with adhesion suited to masonry and cementitious surfaces — the surface most outdoor murals land on.

Two product families cover nearly every project:

• Purpose-made mural coatings. Golden Paintworks Mural & Theme Paints is a single-component, 100% acrylic waterborne coating for exterior and interior work. It is ready to use, cleans up with water, and stays under 50 g/L VOC. It comes in 16 fl oz jars and 128 fl oz (3.78 L) pails. The manufacturer publishes no universal retail price — that varies by seller and location.
• Architectural exterior acrylic latex. Sherwin-Williams Emerald Exterior Acrylic Latex is a 100% acrylic coating, self-priming on most surfaces, and specified for concrete, concrete block, stucco, plywood, wood, aluminum, galvanized steel, cement-composition siding, and vinyl siding. It needs two coats on new, bare substrates and one coat on repaint work.

Finish and temperature range vary by product. Sherwin-Williams A-100 Exterior Acrylic Latex comes in flat, satin, low-sheen, and gloss and can be applied down to 35°F. Latitude Exterior Acrylic Latex is specified for 35°F–120°F application and develops resistance to rain or dew in as little as one hour. Those are architectural-paint specs — not a promise the artwork is weatherproof the moment you finish.

Surface Prep Before the First Stroke

Surface preparation decides whether the coating bonds or fails, and skipping it is the most common reason an outdoor mural peels. Golden says even previously painted surfaces — including freshly painted ones — should be washed with soap and water before acrylic goes on.

1. Clean. Remove dirt, grease, loose coatings, and other contamination. Rinse and let the surface dry.
2. Repair and abrade. Scrape and sand peeling or cracked paint down to a sound, smooth surface. Seal or remove stains with a suitable primer.
3. Prime. Use a primer compatible with waterborne latex or acrylic. On brick, concrete, or other masonry, Golden recommends a masonry conditioner from a commercial coatings supplier, then a compatible water-based latex primer.
4. Respect curing. Sherwin-Williams says new concrete, masonry, cement, and block should generally cure about 30 days before painting, subject to the supplier’s recommendations.

Plan the whole system — primer, paint, topcoat — on one small test patch first. Golden specifically recommends testing the process and technique, because not every acrylic, primer, varnish, and substrate combination is compatible.

Application, Drying, and Protecting the Finished Work

The paint only performs as well as its application conditions and topcoat allow. Golden Paintworks specifies substrate and air temperatures of 50°F–90°F, with 65°F–75°F ideal, and says to avoid rain, fog, and other bad weather. Stir before use, then apply by brush, roller, or spray.

Thinning is allowed with limits: Golden Paintworks can be cut with water up to 10 parts water to 1 part paint for washes. The manufacturer recommends a protective clear coating for dilutions greater than 1:1 and for any exterior application. At 77°F and 50% relative humidity, expect about 30 minutes to touch and 1–2 hours to recoat, then 12–24 hours before the clear coat.

For a long-lived exterior piece, Golden’s two-step system is a permanent isolation coat followed by removable MSA Varnish with UVLS. Let the isolation coat dry 1–2 days — no more than a week — before varnishing, and spray the varnish in 1–3 coats. Mixing 1 part GOLDEN GAC 200 with 2–4 parts paint also improves exterior durability.

Three pigments are a known risk outside: Golden Paintworks lists Dioxazine Purple, Quinacridone Magenta, and Ultramarine Blue as not recommended for exterior use unless a UV-resistant clear topcoat protects them. For a shopping shortlist of tested exterior options, this roundup of the best paint for outdoor murals pairs well with the prep steps above.

Weather, Substrate, and Compatibility Limits

No coating guarantees a fixed service life, and honest planning accounts for climate and surface condition. High heat accelerates drying and can hurt film uniformity; cold weather and high humidity slow curing. Skip damp, contaminated, chalking, unstable, or uncured surfaces entirely — paint over them and the film fails.

Golden’s guide to painting exterior murals lays out the coating system in full. These recommendations cover prepared masonry, concrete, stucco, wood, drywall, metal, and some plastics where the primer and coating makers permit the substrate — not every climate or surface. Water-based products clean up with soap and water, but read the safety label, ventilate, protect skin and eyes, and use respiratory and overspray controls when spraying. Dispose of Golden Paintworks material as latex paint.

Whether the wall is shaded, sun-blasted, near the coast, or repainted every few years, the same rule holds: correct acrylic, proper prep, and a UV-resistant topcoat carry the mural. Surface prep, pigment selection, UV exposure, moisture, and abrasion decide how it ages.