Sherwin-Williams Duration Exterior Acrylic Latex Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- Exterior
- Siding
- Trim
- High durability
- Harsh climates
A pro-grade 100% acrylic latex whose thick, flexible film resists cracking, peeling and fading in extreme weather, backed by a lifetime warranty and self-priming so most repaints need one coat. It is premium-priced at roughly $60-93 a gallon, sold mainly at SW stores, and bare wood or heavy stains still require a primer.
Pros
- Thick, flexible film resists cracking, peeling and fading in extreme weather, backed by a lifetime limited warranty
- Self-priming on sound previously painted surfaces, so most repaints need only one coat
- Good tannin-bleed and flash-rust resistance helps hide nail heads and wood bleed-through
Cons
- Premium price (roughly $60-93/gal) that is well above big-box paints
- Sold mainly at Sherwin-Williams stores, and list price is high unless you catch a contractor sale
- Bare wood, masonry and heavy stains still require a separate primer despite the self-priming claim
Specifications
| Type | 100% acrylic latex (PermaLast technology) |
|---|---|
| Sheens | Flat, Low Lustre, Satin, Gloss |
| Coverage | ~350-400 sq ft/gal (~250-300 for flat) |
| Recoat | ~4 hrs at 45F+ (24-48 hrs in cold/damp) |
| Cleanup | Soap and water |
| Use | Exterior siding & trim; self-priming on previously painted surfaces (bare wood/masonry needs a primer coat) |
Frequently Asked Questions
- How long does Sherwin-Williams Duration Exterior paint last?
- It carries a lifetime limited warranty, which is the manufacturer's own answer, and its thick flexible film is built to resist cracking, peeling and fading in extreme weather. Real-world life depends far more on prep and exposure than on the can: a south-facing wall over poorly prepped wood will fail long before a shaded, properly primed one. Treat the warranty as a statement of confidence rather than a service-life prediction.
- Do I really only need one coat?
- On sound, previously painted siding it is self-priming and most repaints go one coat. Bare wood, masonry and heavy stains are the exception — those still need a separate primer despite the self-priming claim, and skipping it is the most common cause of early failure.
- How long before I can recoat, and what about cold weather?
- About 4 hours at 45°F or above. In cold or damp conditions that stretches to 24-48 hours, so a late-autumn project needs a much longer weather window than the label's headline number suggests.
- How much does a gallon cover?
- Roughly 350-400 sq ft per gallon, dropping to about 250-300 for the flat sheen. Flat always covers less because it goes on heavier — factor that in before buying for a large flat-finish exterior.