Sunbrella fabric is a favorite for outdoor furniture because it shrugs off water, resists fading, and stands up to years of sun and rain. But even the toughest acrylic fabric needs regular care. Dirt, pollen, bird droppings, and the occasional spilled drink will find their way onto your cushions. The good news? Cleaning them is simpler than you think.
This guide walks you through everything from routine spot cleaning to tackling stubborn mildew, plus the storage habits that keep cushions looking new for a decade or more. No harsh chemicals, no expensive services, just proven methods that protect your investment. You can also read our guide on how to clean sunbrella cushions with mildew.
Spraying a gentle cleaning solution onto Sunbrella fabric.
Source: sunbrella.com
Why Cleaning Sunbrella Is Different
Sunbrella is a solution-dyed acrylic fabric. Unlike cotton or polyester blends, the color runs through the entire fiber, not just the surface. That means it resists fading and doesn't absorb water the way natural fibers do. Dirt and spills stay on the surface rather than soaking in, which is why most messes come off with nothing more than soap and water.
That said, Sunbrella is not stain-proof. Oil, wine, and mildew can penetrate if left unchecked. And because the fabric is tightly woven, abrasive scrubbing can roughen the fibers and make them look worn. The right technique matters more than the right product. For more on this, see our guide on how to clean sunbrella outdoor cushions.
Before You Start: What You'll Need
Gather these supplies before you begin. You likely have most of them at home:
- Mild liquid dish soap (Dawn, Seventh Generation, or similar)
- Warm water in a spray bottle or bucket
- Soft-bristled brush or sponge
- Clean towels for blotting
- Baking soda for oil and grease
- Isopropyl alcohol for ink stains
- A shaded outdoor space for air drying
Avoid bleach-based cleaners, wire brushes, and pressure washers. High-pressure water can drive dirt deeper into the weave and damage the fabric over time.
How to Clean Sunbrella Seat Cushions: Step-by-Step
Step 1: Remove Loose Dirt
Brush off loose dirt and debris with a soft brush or simply shake the cushions. If the cushions are especially dusty, vacuum them with a soft brush attachment. This step prevents dirt from turning into mud when water is added. For more on this, see our guide on how to clean sunbrella cushions.
Step 2: Mix a Gentle Cleaning Solution
Fill a spray bottle with warm water and add a few drops of mild dish soap. One cup of water to a teaspoon of soap is plenty. Stir or shake gently to combine. This solution is safe for all Sunbrella fabrics and handles most everyday dirt and grime.
Step 3: Test in an Inconspicuous Spot
Before treating the whole cushion, test the solution on a small area like the underside or a zipper flap. Wait five minutes and check for color bleeding or discoloration. Sunbrella is colorfast, but testing protects against unexpected reactions with previous treatments or fabric protectors. For more on this, see our guide on how to clean seat cushions.
Step 4: Apply and Gently Scrub
Spray the soapy solution onto the affected areas. Use a soft-bristled brush or sponge to work the cleaner in with small circular motions. A little elbow grease is fine, but avoid aggressive pressure. Let the solution sit for a few minutes to break up stubborn grime, especially in creases and along seams.
Step 5: Rinse Thoroughly
Rinse the cushions with clean water until all soap residue is gone. Leftover soap acts like a magnet for future dirt, so this step is critical. A garden hose works well for outdoor cushions. For indoor furniture, use a clean, damp cloth to wipe away the suds.
Step 6: Dry Completely
Air-dry the cushions in the shade. Sun exposure while the fabric is wet can cause uneven fading, especially with darker colors. Prop the cushions upright or lean them against a wall so air circulates on all sides. Depending on humidity and cushion thickness, expect several hours to a full day of drying time. Never use a dryer, steam cleaner, or high-heat source, as heat can shrink or distort the cushion fill.
Tackling common outdoor cushion stains with targeted cleaning methods.
Source: youtube.com
Common Stains and How to Remove Them
Most stains respond to the basic soap-and-water method above, but some need a tailored approach. Act quickly when possible; the longer a stain sits, the harder it is to remove.
Food and Drink Stains
Blot excess liquid with a clean towel—don't rub, which spreads the stain. Apply the soap solution, scrub gently, and rinse. For sugary drinks or dark liquids like red wine, you may need to repeat the process twice.
Grease and Oil
Oil and grease are the toughest stains on Sunbrella. Sprinkle baking soda or cornstarch over the spill to absorb the oil, and let it sit for 15–20 minutes. Brush off the powder, apply the soap solution, and scrub gently. Rinse thoroughly.
Ink and Marker
Dab isopropyl alcohol onto a soft cloth and blot the ink stain. Work from the outside in so the ink doesn't spread. Rinse with water afterward. If the stain persists after the first attempt, wait for the area to dry before trying again.
Mud and Dirt
Let mud dry completely, then brush it off with a dry brush. Once the mud is gone, use the soap solution to remove any remaining residue. Cleaning wet mud will only smear it deeper into the weave.
Bird Droppings
Remove dried droppings carefully with a dull tool or your fingernail, then clean the area with the soap solution. Bird droppings are acidic, so prompt removal helps prevent discoloration.
Mildew
Mildew can develop when cushions stay damp or are stored without proper drying. For active mildew growth, use the deep-cleaning method outlined in the next section.
Deep Cleaning and Mildew Removal
When routine cleaning isn't enough, a stronger solution can restore faded or heavily soiled cushions without damaging the fabric.
The Bleach Mix
Sunbrella officially recommends a solution of 1 cup of bleach, 1/4 cup of mild soap, and 1 gallon of water for deep cleaning and mildew removal. The soap helps the bleach penetrate the fabric and keeps the solution working longer.
Apply the mix with a sponge or soft brush, working it gently into the fabric. Let it sit for 5–10 minutes—don't allow it to dry on the fabric. Rinse completely until all suds and the bleach smell are gone.
The Gentler Alternative
If you're nervous about bleach, oxygen-based cleaners like OxiClean work well for many stains. Mix according to the package directions, apply to the fabric, and allow it to sit for 15 minutes before rinsing. While less powerful than chlorine bleach, it's gentler on fabric color and safer for regular use.
A Practical Note on Bleach
Many cushion owners worry that bleach will ruin their fabric. In practice, a single diluted bleach treatment is safe for Sunbrella's solution-dyed fibers. The risk comes from repeated exposure or leaving the solution on too long. Limit bleach treatments to one pass, and reserve them for situations like mildew after wet winter storage. For everyday cleaning, stick with soap and water.
Applying a deep-cleaning solution to remove mildew from outdoor cushions.
Source: sunbrella.com
Drying, Airing, and Storage Tips
Drying Done Right
Drying is where many people go wrong. Cushions that look dry on the surface can still hold moisture deep in the foam. If you store them in that condition, mildew will develop within weeks.
Always dry cushions in a shaded, breezy area. Stand them on edge or lean them so air reaches the underside. Fluff and rotate them periodically during the drying process to keep the fill evenly distributed and speed up moisture evaporation.
Best Storage Practices
When the season ends, make sure cushions are fully dry before storing them. Brush off loose dirt and give them a quick rinse to remove Salt spray, pollen, and other residue that can break down fabric fibers over time.
Store cushions in a cool, dry place. A climate-controlled garage or basement is ideal—not a damp shed or an unheated attic. Use breathable storage bags or cotton covers. Plastic bags trap moisture and promote mildew.
The Water Repellency Question
Sunbrella is water-resistant but not waterproof. Over time, soiling can reduce the fabric's ability to repel moisture. A fabric protector designed specifically for acrylic outdoor fabrics can help maintain water repellency. Apply it to clean, dry fabric and reapply after deep cleaning. This is optional but worth considering for cushions in exposed locations.
Maintenance Habits That Keep Cushions Fresh
Consistent minor upkeep means fewer deep cleans and longer fabric life.
Wipe Up Spills Immediately
The sooner you blot a spill, the less likely it will set. Keep a spray bottle of soapy water near the patio doors or in a convenient spot. A quick spray and wipe right after a spill prevents the need for a full cleaning session later.
Rinse Seasonally
Give cushions a plain-water rinse at the start and end of the season. This washes away airborne grime, salt residue, and pollen before they have a chance to bond with the fabric.
Use Covers When Needed
When cushions aren't in use for extended periods, covers block the worst of the sun, dirt, and bird droppings. Look for covers made from breathable materials that allow trapped moisture to escape.
Rotate Cushions
Rotate cushions periodically so they wear evenly. The ones in the path of afternoon sun or frequent use can fade or compress faster than their neighbors. Regular rotation evens out the wear.
When to Call a Professional
Sometimes DIY cleaning just isn't enough. If you encounter any of these situations, a professional upholstery cleaner may be your best option:
- Set-in stains that resist multiple treatments. Professional cleaning equipment generates suction and agitation that hand cleaning can't match.
- Compressed or mildewed foam. If the cushion fill has lost its shape or developed a musty odor that returns after drying, the foam likely needs replacement.
- Rips, broken zippers, or failed seams. These are repair jobs, not cleaning jobs. A professional can re-cover cushions and replace hardware.
- Warranty concerns. Some manufacturers require specific cleaning methods to maintain warranty coverage. Check your warranty terms before using bleach or hiring a cleaning service.
Inspecting a Sunbrella cushion for signs of damage that may need professional attention.
Source: fj-outdoors.com
Mistakes to Avoid
- Using harsh scrubbers. Steel wool, wire brushes, and abrasive pads roughen the acrylic fibers, making the fabric look old and fuzzy.
- Skipping the rinse step. Soap residue attracts dirt and makes cushions appear dingy shortly after cleaning.
- Pressure washing. The water stream drives dirt deeper into the weave and can wedge debris into seams and zippers.
- Using chlorine bleach frequently. While safe in diluted form for deep cleaning, regular bleach use will eventually weaken fibers and dull color.
- Storing wet cushions. This is the single biggest cause of mildew problems. Always confirm cushions are completely dry before storage.
- Ignoring label instructions. Sunbrella gives detailed care guidance for each fabric type. When in doubt, follow the manufacturer's directions.
Frequently Asked Questions
What is the safest cleaner for Sunbrella fabric?
Mild liquid dish soap mixed with warm water is the safest and most effective cleaner for everyday grime. It is gentle on fibers, safe for the environment, and won't affect color.
Can I use bleach on Sunbrella cushions?
Yes, but only for deep cleaning or mildew removal. Use a diluted mix (1 cup bleach, 1/4 cup soap, 1 gallon water), don't let it dry on the fabric, and rinse thoroughly. For routine cleaning, stick with soap and water.
How long do Sunbrella cushions take to dry?
It depends on weather and cushion thickness. On a warm, breezy day, expect 4–8 hours. In humid conditions, it can take a full day. Always confirm cushions are completely dry before storing or covering.
Will cleaning fade my Sunbrella cushions?
Regular gentle cleaning with mild soap will not cause fading. Harsh chemicals, excessive scrubbing, and prolonged sun exposure while wet can contribute to color loss.
Can I machine wash Sunbrella cushion covers?
Some Sunbrella covers are machine-washable in cold water on a gentle cycle with mild soap. Always check the care tag first. Hang-dry covers rather than putting them in a dryer.
Keep Your Cushions Looking New for Years
Cleaning Sunbrella cushions doesn't require expensive products or professional help. Stick to mild soap and water for routine care, treat stains quickly with targeted methods, and reserve bleach for occasional deep cleaning. Dry thoroughly before storing, and keep up with small maintenance habits throughout the season.
The payoff is simple: cushions that stay bright and comfortable season after season, and an investment in outdoor furniture that lasts. If your indoor sleep setup could use similar attention, explore our guides on building a comfortable sleep environment. For those with existing outdoor seating, a quick review of your cushion condition today can save you from dealing with stubborn stains or mildew next spring.
Daniel Hart is a consumer product analyst who specializes in mattress technology, smart bedding, and home comfort innovation. Before joining Royal Comport, Daniel worked with several e-commerce research teams, testing and comparing sleep products for quality, value, and long-term performance. He brings data-driven insight and real-world testing to every review he writes.
