Short answer
Use a high-build elastomeric on stucco, block or tilt-up that has hairline cracking or takes heavy sun and wind-driven rain. Use a premium 100% acrylic on sound walls, trim and surfaces where a thick film isn’t needed.
What elastomeric coatings do
Elastomerics go on much thicker than paint and stay flexible. Sherwin-Williams describes ConFlex XL as a coating that bridges hairline cracks and keeps water out even in wind-driven rain, while not trapping moisture vapor inside. That flexibility is why they suit stucco, which moves with Arizona’s temperature swings.
- Bridges hairline cracks
- Thick, water-resistant film
- Great on stucco, CMU block and tilt-up panels
- Costs more and uses more material
What premium acrylics do
A premium 100% acrylic, such as Dunn-Edwards EVERSHIELD or Sherwin-Williams Duration Exterior, gives excellent UV and color retention, mildew resistance and adhesion at a lower cost. It’s the right call on sound stucco, trim, fascia and properly primed metal.
- Strong color and UV resistance
- Lower cost per wall
- Works on more surfaces, including trim
- Won’t bridge active cracks
How we choose
We don’t pick one product for the whole building. We walk every wall and match the system to the surface:
- Chalky or bare masonry: condition it first, for example with Loxon Conditioner.
- Cracked stucco or block in full sun: repair, then a high-build elastomeric.
- Sound stucco and trim: a premium acrylic in the right sheen.
- Metal doors and rails: clean, prime, then finish.
Every bid names the exact products and coats, so you can compare it line by line.
Related: Stucco, EIFS and fascia repair · Coatings we trust · Tilt-wall and warehouse painting
Frequently asked questions
Is elastomeric paint good for stucco in Arizona?
Often, yes. A high-build elastomeric bridges hairline cracks and keeps water out, which suits stucco that moves with the heat. It isn’t the right call for every wall, so it should be matched to the surface.
Can you put regular paint over elastomeric?
It’s possible with the right prep and primer, but elastomeric is flexible and some rigid paints don’t perform well over it. Tell your painter what’s on the wall now.
Does elastomeric cost more?
Yes. It costs more per gallon and goes on thicker, so it takes more material. It can pay back on walls with cracking or heavy sun.
Need a bid in the Valley? Shield Coat Painting is owner-led, licensed (AZ ROC #361356, CR-34), and puts every product, coat and warranty in writing.