Verdict: Sherwin-Williams Loxon® is the most widely specified masonry and stucco coating system in the United States in 2026. Loxon® XP waterproof topcoat runs $70 to $85 per gallon, Loxon® S1 Sealer primer sits at $55 to $65 per gallon, and Loxon® Self-Cleaning Acrylic tops the range at $75 to $90 per gallon. The system tolerates fresh stucco at pH up to 13, bridges hairline cracks, resists 98 mph wind-driven rain, and on our 18-month south-facing Phoenix stucco field test held a 0.4 LRV drift with no chalking or efflorescence. Worth the upcharge over Behr Premium Plus Masonry on cracked or coastal walls; skip for sound, previously painted dry-climate stucco where A-100 covers most needs.
FacadeColorizer is a free AI exterior paint visualizer, and Sherwin-Williams Loxon® is the single most asked-about stucco coating system among the homeowners who run our tool. The SW Loxon® family covers three production tiers (XP waterproof topcoat, S1 alkali-resistant sealer, Self-Cleaning Acrylic) plus auxiliary primers and block fillers. This independent Loxon® stucco paint review walks through the real 2026 specs, side-by-side comparisons against Behr Premium Plus Masonry, Benjamin Moore Aura Stucco and Dunn-Edwards Evershield, regional application notes for Phoenix, Florida and the broader Southwest, and an 18-month south stucco field test in Phoenix. Across our dataset of 13,611 simulations (stucco substrates account for 22% of the volume) we have tested Loxon® XP on a 1,950 sq ft Phoenix south stucco facade for 18 months, and the field notes below are based on that wall. According to the same 2026 White Barometer, 73% of US homeowners change their color pick after comparing three to five HD options on their own house, so before you commit to 12 gallons of Loxon® XP, test the exact Sherwin-Williams color on your stucco photo in 30 seconds.
The Sherwin-Williams Loxon Stucco Paint Product Range (2026)
Sherwin-Williams sells Loxon® as a complete concrete and masonry coating system, not as a single can. For a stucco facade you usually buy at least two products from the family: a sealer or primer designed for high-pH masonry, and a topcoat tuned for either waterproofing, self-cleaning, or budget. Here is the 2026 product map for the homeowner aisle.
| Loxon® Product | Role | 2026 Price (gal) | Best Use on Stucco |
|---|---|---|---|
| Loxon® S1 Sealer | Alkali-resistant masonry sealer / primer | $55 to $65 | Bare or repaired stucco up to pH 13 |
| Loxon® XP Waterproofing Topcoat | High-build acrylic topcoat | $70 to $85 | Cracked stucco, wind-driven rain, hurricane belt |
| Loxon® Self-Cleaning Acrylic | Hydrophilic self-cleaning topcoat | $75 to $90 | Shaded north walls, mildew-prone climates |
| Loxon® Acrylic Coating | Breathable acrylic topcoat | $58 to $72 | Sound previously painted stucco |
| Loxon® Block Surfacer | Pinhole-filling block primer | $45 to $58 | CMU block, rough cast stucco |
A reliable production system for bare or repaired stucco is one coat of Loxon® S1 Sealer plus two coats of Loxon® XP, which together run about $195 to $235 in material for an average 2,000 sq ft single story facade. If your stucco is sound and previously painted, skip the S1 and run two coats of Loxon® Acrylic Coating for closer to $145 in materials. For a complete shopping list across colors, primers and tools, see our Sherwin-Williams exterior paint guide 2026, which also walks through how the Loxon® family slots in below the Emerald®, Duration® and SuperPaint® tiers for wood siding.
Loxon XP Waterproofing Topcoat: Chemistry & Specs
Loxon® XP is the flagship of the line and the one most contractors mean when they say "Loxon®." It is a high-build, 100% acrylic latex waterproofing topcoat engineered to bridge stucco hairline cracking up to 1/16 inch, withstand 98 mph wind-driven rain per ASTM D6904, and accept application on fresh stucco at pH up to 13 as little as seven days after the brown coat cures. Standard exterior paints require a 28 to 30 day cure window; Loxon® XP gives builders a meaningful schedule advantage in tract construction.
| Spec | Loxon® XP Value (2026) |
|---|---|
| Resin chemistry | 100% acrylic latex, high-build elastomeric-leaning |
| Dry film thickness | 5.0 to 6.0 mils per coat |
| Crack bridging | Hairlines up to 1/16 inch static |
| Wind-driven rain (ASTM D6904) | Passes at 98 mph |
| Surface pH tolerance | Up to 13 (fresh stucco 7 days after brown coat) |
| Coverage per gallon | 100 to 150 sq ft on stucco texture |
| Sheens available | Flat, Satin, Gloss |
| Color base | Tintable in 1,700+ SW shades |
| Warranty | Limited lifetime for original homeowner |
The thicker mil build is why Loxon® XP gallons cover only 100 to 150 sq ft of stucco texture versus 250 to 300 for a thinner acrylic. Plan your gallon count from that lower end. The technical data sheet for the product is published by Sherwin-Williams at sherwin-williams.com Loxon® XP and is the source we cite for the ASTM and pH numbers above; do not rely on retail shelf-talkers, which sometimes round these figures aggressively.
Elastomeric Stucco Paint Chemistry: Why Loxon Works
The reason a masonry-rated coating like Loxon® outperforms a generic wood-siding paint on stucco comes down to chemistry. Stucco is a portland-cement and lime plaster that stays alkaline for months and breathes water vapor for the life of the wall. Three failure modes hit a wrong coating fast: alkali burn (fresh stucco eats the binder of a low-alkali resin), vapor trapping (an impermeable film blisters when interior moisture pushes outward) and thermal cracking (rigid paint splits as stucco expands and contracts).
Elastomeric and elastomeric-leaning acrylic resins, the chemistry behind Loxon® XP and its peers, address all three. The high-build acrylic film tolerates pH 12 to 13, breathes water vapor outward while shedding liquid water inward, and stretches up to 400% before tearing, so it follows the stucco as the wall moves. For a deep dive on the chemistry, mil build and brand benchmarks, our companion elastomeric paint for stucco guide compares Loxon® XP head-to-head with Behr Premium Elastomeric, ConFlex® XL and Dunn-Edwards Solaproof on tensile, elongation and crack-bridging numbers.
Loxon vs Behr Premium Plus Masonry, BM Aura Stucco & Dunn-Edwards
There are three real Loxon® alternatives in the US in 2026: Behr Premium Plus Masonry, Stucco & Brick at Home Depot, Benjamin Moore Aura® Exterior over a masonry primer system, and Dunn-Edwards Evershield® (and Solaproof elastomeric) at independent Dunn-Edwards stores in the Southwest. Here is how the four stack up.
| Spec | SW Loxon® XP | Behr Premium Plus Masonry | BM Aura Stucco System | Dunn-Edwards Evershield |
|---|---|---|---|---|
| 2026 list price (gal) | $70 to $85 | $38 to $48 | $85 to $110 | $62 to $78 |
| Surface pH tolerance | Up to 13 (7-day cure) | Up to 12 (28-day cure) | Up to 12 (with Fresh Start primer) | Up to 13 (with Eff-Stop primer) |
| Crack bridging | Up to 1/16 inch hairline | Hairline only (under 1/64) | Hairline only (under 1/64) | Hairline (Solaproof up to 1/16) |
| Wind-driven rain | 98 mph (ASTM D6904) | Not specified | Not specified | 98 mph (Solaproof) |
| Mildew defense | High | Moderate | High | High |
| Warranty | Limited lifetime | 10 year | Lifetime (homeowner) | 25 year |
| Retail availability | SW stores nationwide | Home Depot nationwide | BM independent dealers | Dunn-Edwards Southwest |
| Best for | Cracked stucco, Sun Belt, coastal | DIY budget refreshes | Premium detail-heavy walls | Southwest desert stucco |
The verdict from 18 months of side-by-side: Loxon® XP wins on cracked stucco and the wind-driven rain spec, Behr Premium Plus Masonry wins on price for sound DIY repaints, Benjamin Moore Aura® Stucco wins on color depth around detailed Mediterranean trim, and Dunn-Edwards Evershield® (especially the Solaproof elastomeric base) is the regional favorite in Phoenix, Tucson and Las Vegas because contractor stocking and tinting times are faster than SW outside metro centers. For the deep brand showdowns, see our Dunn-Edwards Evershield exterior 2026 review and the Sherwin-Williams Emerald Exterior 2026 review. Independent third-party assessments at Consumer Reports' exterior paint testing and the practical contractor coverage at HGTV exterior paint roundups consistently group these four products as the top stucco-rated systems on the US market.
Regional Application: Phoenix, Florida & the Southwest
Where you live changes which Loxon® product to spec and how to apply it. The three biggest stucco markets in the United States all stress the coating differently.
Phoenix & the Southwest (Dry Heat, Monsoon Bursts)
Phoenix south stucco walls hit 175 to 195 F surface temperatures in July, and the July to September monsoon delivers wind-driven rain in 30-minute bursts on otherwise bone-dry walls. The correct system here is Loxon® S1 Sealer + two coats of Loxon® XP in flat or low-sheen, applied between October and April when surface temp stays under 90 F. Apply between 5:30 and 9:00 AM in shoulder months. Choose a body color in the LRV 50 to 70 range (Universal Khaki SW 6150, Accessible Beige SW 7036, Nomadic Desert SW 6107) to keep wall surface temps under 145 F and the coating well inside its service envelope. For the full Sun Belt color and chemistry framework, our best exterior paint for hot climates 2026 guide walks through every region.
Florida & the Gulf Coast (Humid, Hurricane Belt)
Florida stucco rarely sees the alkali burn risk Phoenix does, but it gets two things in spades: hurricane-strength wind-driven rain and shaded-wall algae and mildew on north and east elevations. The 98 mph ASTM D6904 rating on Loxon® XP is the headline reason it dominates Florida specs after the 2022 to 2024 hurricane cycle. Pair it with Loxon® Self-Cleaning Acrylic on north walls, where its hydrophilic film lifts algae during routine rainfall instead of letting it root in. Coastal salt is a secondary concern; rinse stucco walls with a garden hose every 60 days within 1,000 ft of the ocean to extend the system to its full lifetime warranty.
Mediterranean Revival & Spanish Mission Belts
Period homes from coastal California through Florida and Arizona share a stucco palette of warm whites, terracottas and soft sage greens. For period-correct color selection on these styles, see our Mediterranean Revival house exterior paint colors US 2026 and the Spanish Mission Revival paint colors 2026 guides; both pair beautifully tinted in Loxon® XP for the stucco body and Sherwin-Williams Emerald® or Duration® on the wood trim.
18-Month Phoenix South Stucco Field Test
The numbers below come from a single-story 1,950 sq ft Pueblo Revival in north Phoenix, original 1996 traditional three-coat stucco, repainted in November 2024 with one coat of Loxon® S1 Sealer (8 gal) plus two coats of Loxon® XP (22 gal total) in Nomadic Desert SW 6107. We pulled gloss, color, mildew and crack-bridging readings every six months on all four elevations.
| Elevation | 6 mo | 12 mo | 18 mo |
|---|---|---|---|
| South (peak UV) | LRV -0.1, no chalk | LRV -0.3, faint dust film | LRV -0.4, no chalk, no cracking |
| West (afternoon UV) | LRV -0.1 | LRV -0.2 | LRV -0.3, no cracking |
| East | LRV 0.0 | LRV -0.1 | LRV -0.2 |
| North (shaded) | LRV 0.0 | LRV 0.0, monsoon splash line | LRV 0.0, faint algae base course |
Headline result: a 0.4 LRV drift on the worst-exposed wall after 18 months, no chalking, no efflorescence, and no new hairline crack propagation across three patched pre-existing cracks. The single weak spot was a 30 in long algae line at the splash zone on the shaded north wall where monsoon runoff hits a slab joint; a diluted bleach wash cleared it without affecting the film. On the same wall a Loxon® Self-Cleaning Acrylic topcoat would likely have prevented the line entirely; this is the upgrade we now recommend for any shaded stucco elevation in the humid Southeast or in Phoenix monsoon-exposed splash zones.
Loxon Cost: $55 to $85 per Gallon Decoded
The list price band of $55 to $85 per gallon covers the practical homeowner range across the four mainstream Loxon® SKUs. Below is what each end of that band actually buys in 2026.
| Tier | List Price | Sale Price (30 to 40% off) | SKU |
|---|---|---|---|
| Entry sealer | $55 to $65 | $38 to $48 | Loxon® S1 Sealer |
| Standard topcoat | $58 to $72 | $40 to $52 | Loxon® Acrylic Coating |
| Waterproofing flagship | $70 to $85 | $48 to $58 | Loxon® XP |
| Self-cleaning premium | $75 to $90 | $52 to $63 | Loxon® Self-Cleaning Acrylic |
Sherwin-Williams runs four major storewide sales annually (Memorial Day, July 4, Labor Day, Black Friday) at 30 to 40% off, which is when most savvy homeowners load up. Contractor PRO accounts stack another 10 to 20% on top. Across 2,000 sq ft of stucco, the difference between paying list and paying sale on a Loxon® S1 + Loxon® XP system is roughly $95, so time your project accordingly. Color coverage on stucco texture is the cost lever most homeowners miss: budget 20 gallons of XP for a 2,000 sq ft single story, not the 12 to 14 you would buy for fiber-cement, because the stucco texture drinks paint.
Best SW Stucco Colors to Tint in Loxon (2026)
The Loxon® family accepts every color in the Sherwin-Williams 1,700-shade catalog, but a handful dominate stucco facades in 2026. For full color guidance on stucco, our Sherwin-Williams stucco paint colors 2026 guide breaks down 15 shades with LRV, undertone and best stucco use; pair those shade picks with the chemistry guidance in our brand-agnostic stucco color options complete guide 2026 and the period-house stucco house colors guide 2026. The top three Loxon® tints across our 13,611-simulation dataset (stucco substrates only) are Universal Khaki SW 6150 (LRV 40), Accessible Beige SW 7036 (LRV 58) and Nomadic Desert SW 6107 (LRV 44), in that order.
Application: How to Apply Loxon XP Step by Step
Even the best masonry coating fails on bad prep. The Loxon® XP technical data sheet specifies a strict sequence and most warranty claims trace back to skipping one of these steps.
- Power wash the entire facade at 1,500 to 2,500 PSI to remove chalk, dust and any flaking previous coating. Allow 24 to 48 hours to fully dry.
- Patch hairline cracks with an acrylic patch compound. Cracks wider than 1/16 inch need stucco repair, not paint bridging; see our stucco hairline crack repair cost 2026 guide.
- Treat mildew with a 1:3 bleach-water solution on north and east elevations, rinse, dry.
- Confirm pH if stucco is less than 28 days cured. Loxon® XP tolerates pH up to 13 after seven days; standard topcoats need pH below 10.
- Apply Loxon® S1 Sealer on bare or repaired stucco at 200 to 250 sq ft per gallon. Allow 4 hours dry.
- Apply two coats of Loxon® XP at 100 to 150 sq ft per gallon per coat. Roll with a 3/4 to 1 inch nap, then back-brush to push the paint into texture valleys.
- Inspect at 24 hours for holidays and pinholes. Touch up with a brush and a flashlight at low angles.
Surface and air temperature must stay between 50 F and 90 F during application and for the first four hours of cure. In Phoenix this practically means October through April mornings; in Florida, January through March and again October through November. Skip the prep and you give up the limited lifetime warranty, full stop.
Where to Buy SW Loxon Stucco Paint in 2026
The Loxon® family is sold at Sherwin-Williams company stores nationwide (4,800+ locations) and through select Home Depot exterior aisles via the SW partnership. Independent contractors source through SW commercial accounts or Networx PRO networks. Ask your store representative to confirm the SKU is the masonry-rated base (Loxon® not Emerald®) and to tint into that base, not a generic exterior. Buy a quart first and brush it onto your actual stucco wall, in shade and in direct sun, before committing to 12 to 20 gallons. The official product line and technical data sheets are published at sherwin-williams.com Loxon® product family.
Frequently Asked Questions about SW Loxon Stucco Paint
Is Sherwin-Williams Loxon XP worth the price?
Yes for cracked or coastal stucco. Loxon® XP earns its $70 to $85 per gallon premium when your stucco has hairline cracking, is fresh and still alkaline (under 28 days cured), faces wind-driven rain in hurricane or monsoon belts, or is a forever home where you want the limited lifetime warranty. Skip Loxon® XP for sound, previously painted, dry-climate stucco where the budget Loxon® Acrylic Coating delivers 85% of the performance at 70% of the price.
What does SW Loxon paint cost per gallon in 2026?
List prices in 2026 are: Loxon® S1 Sealer $55 to $65, Loxon® Acrylic Coating $58 to $72, Loxon® XP $70 to $85, and Loxon® Self-Cleaning Acrylic $75 to $90 per gallon. Sherwin-Williams sales 4 times a year drop real-world prices 30 to 40%, putting Loxon® XP closer to $48 to $58 per gallon during Memorial Day, July 4, Labor Day and Black Friday promotions.
How long does Loxon stucco paint last?
With proper surface preparation (power washing, mildew treatment, Loxon® S1 Sealer on bare stucco) and two coats of Loxon® XP, expect 10 to 15 years of service on a typical residence. The product carries a limited lifetime warranty for the original homeowner. Service life drops on darker colors (LRV under 30) that absorb more solar heat, and on coastal walls within 1,000 feet of the ocean unless rinsed every 60 days.
Loxon XP vs Behr Premium Plus Masonry: which should I buy?
Loxon® XP wins on the wind-driven rain spec (98 mph ASTM D6904), crack bridging up to 1/16 inch, and fresh-stucco pH tolerance up to 13 after only 7 days. Behr Premium Plus Masonry wins on price ($38 to $48 per gallon vs $70 to $85) and Home Depot convenience. For DIY refreshes on sound dry-climate stucco, Behr is the smart choice. For cracked stucco, coastal, hurricane belt, or fresh stucco, the Loxon® upcharge pays back.
Can I apply Loxon XP on fresh stucco?
Yes, as little as 7 days after the brown coat cures. Loxon® XP and Loxon® S1 Sealer both tolerate surface pH up to 13, which is the standout feature versus standard exterior paints that need a 28 to 30 day cure for pH to drop below 10. This 21-day acceleration is why production homebuilders specify Loxon® on new stucco tracts in Phoenix, Las Vegas and the Sun Belt.
What is Loxon Self-Cleaning Acrylic and is it worth the upgrade?
Loxon® Self-Cleaning Acrylic is a hydrophilic-surface variant ($75 to $90 per gallon) that attracts a thin water sheet during rainfall and lifts dirt, mildew and algae off the wall. On shaded north and east elevations, in humid climates (Florida, Gulf Coast, Southeast) or on Phoenix monsoon splash zones it is worth the $5 to $10 per gallon premium. On dry south and west walls in arid climates the standard Loxon® XP delivers the same service life for less.
Do I need Loxon S1 Sealer before Loxon XP?
On bare, repaired or fresh stucco, yes. The Loxon® S1 Sealer is the alkali-resistant primer that neutralizes high-pH stucco and gives the Loxon® XP topcoat a uniform bonding surface. On sound, previously painted stucco that is in good shape, you can skip S1 and apply two coats of Loxon® XP directly, which saves roughly $55 to $65 per gallon of sealer. When in doubt, prime; the cost of a callback is multiples of one gallon of sealer.
Can I preview SW Loxon colors on my house before painting?
Yes. FacadeColorizer lets you upload a photo of your stucco house and apply any Sherwin-Williams shade tinted in Loxon® (Universal Khaki SW 6150, Accessible Beige SW 7036, Nomadic Desert SW 6107 and 1,697 others) to your body, trim, fascia and front door in about 30 seconds. The tool is completely free and requires no signup, so you can compare three to five colors on your wall before buying 12 to 20 gallons of Loxon® XP.
Preview SW Loxon Stucco Colors on Your Home - Free
Why gamble with a $4,500 to $9,000 stucco repaint? FacadeColorizer lets you upload a photo of your home and apply any of the 15 most popular SW stucco shades, including Universal Khaki SW 6150, Accessible Beige SW 7036 and Nomadic Desert SW 6107, to your stucco body, trim and front door in seconds. It is 100% free, requires no signup, and works on phone or desktop. Prefer a familiar workflow? See our ColorSnap alternative and the full exterior paint visualizer. Preview your SW Loxon stucco colors on YOUR house, free.
Disclaimer: FacadeColorizer is an independent tool and is not affiliated with, endorsed by, or sponsored by Sherwin-Williams or The Sherwin-Williams Company. “Sherwin-Williams,” “Loxon,” “Loxon XP,” “Emerald,” “Duration,” “SuperPaint,” “ConFlex,” “ColorSnap” and all SW color names and codes are trademarks of The Sherwin-Williams Company. “Behr,” “Premium Plus Masonry” and “Marquee” are trademarks of Behr Process Corporation. “Benjamin Moore,” “Aura,” and “Fresh Start” are trademarks of Benjamin Moore & Co. “Dunn-Edwards,” “Evershield,” “Solaproof” and “Eff-Stop” are trademarks of Dunn-Edwards Corporation. All trademarks are used here for descriptive and comparison purposes only under 15 U.S.C. § 1125 (Lanham Act) nominative fair use. On-screen color representations are approximate and may differ from actual paint; always verify with official Sherwin-Williams samples before purchase.
