Best Paint for Bathrooms: Moisture and Mould Resistance
By James Thornton, Perth Painting Services | 11+ years painting Perth homes | Updated 5 October 2026
Quick answer
The best paint for a bathroom is a water-based acrylic paint made for kitchens and bathrooms, in a low-sheen, satin or semi-gloss finish, with mould-resistant additives. Use a mould-resistant ceiling paint overhead, and a suitable primer on bare, patched or stained surfaces. Paint can’t fix poor ventilation. If steam isn’t leaving the room, even the best paint will eventually fail.
Key takeaways
- Choose a paint labelled for kitchens and bathrooms, with moisture and mould resistance.
- Satin or semi-gloss is easiest to clean and handles steam, while low sheen hides surface flaws better.
- The ceiling is the first place mould shows, so don’t use standard ceiling paint there.
- Ventilation matters as much as the paint. Fix moisture first.
- Preparation decides how long the finish lasts, particularly over old glossy paint, tiles or existing mould.
Why bathrooms are hard on paint
A bathroom is the toughest room in the house for paint. Hot showers create steam, steam turns to condensation on cool walls and ceilings, and the moisture lingers if the room is poorly ventilated. Over time that causes:
- Peeling and blistering, when moisture gets under the paint film
- Mould and mildew, usually on ceilings, corners and around windows
- Staining and soap scum build-up, which marks soft, flat finishes
- Chalky or discoloured paint, when the wrong product is used
We’ve painted Perth bathrooms for over 11 years, and most failures trace back to two things: the wrong product, and a room that never dries out properly.
What to look for on the tin
Brands differ, so compare labels rather than just names. Look for:
| What to check | Why it matters |
|---|---|
| Labelled for kitchens and bathrooms or wet areas | Formulated for steam, condensation and frequent cleaning |
| Mould or mildew resistance | Additives that help stop growth on the paint film |
| Washability or scrub resistance | Lets you clean soap scum without damaging the paint |
| Water-based acrylic | Flexible, low odour and suited to most interior walls |
| Sheen level | Higher sheen resists moisture and cleans more easily |
| Recommended primer or undercoat | Some surfaces need a specific primer |
| Recoat time and cure time | A bathroom needs to stay dry while paint cures |
Major Australian brands, including Dulux, Taubmans, Haymes and Wattyl, all sell kitchen and bathroom ranges. [Optional: add the specific products you use and trust. This is a strong E-E-A-T signal.]
Mould-resistant additives help slow mould growth on the paint surface. They don’t remove moisture, and they don’t fix a damp wall.
Best paint finish for a bathroom
| Finish | Best for | Pros | Cons |
|---|---|---|---|
| Matt / flat | Ceilings (with a bathroom-rated product) | Hides flaws | Marks easily and cleans poorly on walls |
| Low sheen | Bathrooms with good ventilation and uneven walls | Soft look, hides imperfections | Less moisture resistant than satin |
| Satin | Most bathrooms | Good balance of washability and appearance | Shows some wall imperfections |
| Semi-gloss | Wet zones, trim, doors, shower surrounds | Most moisture resistant and easiest to clean | Highlights every flaw, so prep must be excellent |
| Gloss | Rarely walls | Very durable | Harsh look, shows every imperfection |
Our usual recommendation: satin on walls, semi-gloss on trim and doors, and a bathroom-rated flat or low-sheen ceiling paint. If your walls are uneven, low sheen can look better, provided the room is well ventilated.
Best paint for a bathroom ceiling
The ceiling is where mould appears first, because warm, moist air rises and condenses on the coolest surface.
- Use a ceiling paint labelled for bathrooms or wet areas, with mould resistance.
- A flat or matt finish hides flaws and reduces glare, but make sure it’s rated for moisture.
- Clean and treat any mould before painting, or it will grow back through the new coat.
- Prime stained areas with a stain-blocking primer so water marks don’t bleed through.
Standard interior ceiling paint is the most common mistake we see in bathrooms.
Fix the moisture first
No paint will last in a bathroom that stays damp. Before you paint, check:
- Ventilation. Does the exhaust fan work, and does it vent outside rather than into the roof space? Run it during every shower and for 15–20 minutes afterwards.
- Leaks. Look for stains around the shower, behind the vanity, under the basin and on the ceiling below any upstairs bathroom.
- Waterproofing and grout. Failed sealant, cracked grout and aged waterproofing can let moisture into the walls.
- Airflow. Opening a window or door afterwards helps the room dry.
If you find a leak or a damp, soft or crumbling wall, stop and get the problem repaired before painting. Painting over damp traps moisture and the paint will fail quickly.
How to prepare a bathroom for painting
Good prep matters more here than in any other room. The same principles apply as in our guide to how to prepare walls for painting, with a few bathroom-specific steps:
- Fix moisture and ventilation problems first.
- Remove or mask fittings, accessories and fans, and protect tiles, the bath and the floor.
- Treat mould. Use a mould-killing wash, scrub, rinse and let it dry completely.
- Degrease and clean. Soap film and body oils stop paint sticking. Wash with sugar soap or detergent, rinse well and dry.
- Scrape loose or peeling paint and feather the edges.
- Fill and sand. Use a filler suited to damp areas, and flexible sealant at joints that move.
- Scuff-sand glossy surfaces so the new coat can grip.
- Prime. Spot-prime repairs and stains, and use a bonding primer over old gloss or enamel.
- Let everything dry fully before painting.
Safety note: older Perth homes may contain lead paint, and homes built before the mid-1980s can contain asbestos in fibro sheeting or wet-area walls. Don’t sand or scrape suspected material. Get advice first.
Which surfaces can you paint in a bathroom?
| Surface | Can you paint it? | Key point |
|---|---|---|
| Plasterboard walls and ceilings | Yes | Use moisture-resistant plasterboard in wet areas, and the right primer on new board |
| Previously painted walls | Yes | Clean, scuff-sand and prime if glossy |
| Wall tiles | Sometimes | Needs specialist tile primer and coating, and results vary in wet areas |
| Shower walls | Rarely | Usually better left tiled or sealed, not painted |
| Timber trim and doors | Yes | Semi-gloss or enamel suits |
| Vanities and cabinets | Yes | Use a cabinet-grade system with the right primer |
| Mouldy or damp surfaces | No (not yet) | Treat the mould and fix the moisture first |
Choosing bathroom colours
Colour affects how the room feels, and Perth’s bright light changes how it looks. Soft warm whites, pale sage and gentle blue-greys are popular and forgiving. Deeper colours look striking but show soap marks and water spots more, and need good coverage. For colour advice, read our guide to interior paint colours in Perth.
Common bathroom painting mistakes
- Using standard wall or ceiling paint instead of a bathroom-rated product
- Painting over mould or damp without fixing the cause
- Skipping the clean, so the paint peels from soap film
- Using a flat finish on walls close to the shower
- Skipping primer on patches, stains or glossy surfaces
- Using the room too soon after painting. Avoid steamy showers until the paint has cured, and follow the tin
- Poor ventilation, before and after painting
How long does bathroom paint last?
A well-prepared bathroom painted with the right product and ventilated properly can last for many years. A poorly ventilated bathroom or a rushed job might need repainting much sooner. Lifespan depends on the product, preparation, ventilation, how much steam the room sees, and how often you clean the surfaces. Professionals follow the Australian guide to painting buildings, AS/NZS 2311, as a benchmark for good preparation.
How much does it cost to paint a bathroom in Perth?
Bathroom painting is usually priced as part of a room or whole-interior job. Costs depend on size, ceiling, trim, repairs, mould treatment and the product used. For realistic numbers, see our interior house painting cost guide and how much it costs to paint a room in Perth.
DIY or hire a painter?
A small, healthy bathroom can be a reasonable DIY job. Hire a professional if:
- There’s visible mould, peeling or damp
- The home is older and may contain lead or asbestos
- You need to repaint tiles, vanities or cabinets
- You want a lasting finish without repeat jobs
If you’re comparing painters, read 12 checks to choose a reliable painter in Perth.
Frequently asked questions
What is the best paint for a bathroom?
A water-based acrylic labelled for kitchens and bathrooms, with mould resistance, in satin or semi-gloss. Use a bathroom-rated ceiling paint overhead.
What finish is best for a bathroom?
Satin is the most popular choice for walls. Semi-gloss suits trim, doors and wet zones. Low sheen can work in well-ventilated bathrooms with uneven walls.
Can I use normal interior paint in a bathroom?
You can, but it’s not recommended. Standard paint isn’t designed for steam and cleaning, so it tends to peel, mark or grow mould sooner.
Does mould-resistant paint stop mould completely?
No. It helps slow mould growth on the paint surface, but it can’t fix damp or poor ventilation.
What’s the best paint for a bathroom ceiling?
A mould-resistant ceiling paint labelled for wet areas, usually in flat or low sheen. Treat existing mould and prime stains first.
Do I need to prime before painting a bathroom?
Often yes. Prime bare, patched or stained surfaces, and use a bonding primer over old gloss paint.
Can you paint bathroom tiles?
Sometimes, with a tile-specific primer and coating. Results vary, and shower walls are usually better left as they are.
How long should I wait before using the shower after painting?
Follow the paint’s cure time on the tin, and keep the room ventilated. Avoid long, steamy showers until the paint has cured.
How do I stop mould coming back after painting?
Fix the moisture source, use the fan every shower, keep the room dry and clean surfaces regularly.
Is painting a bathroom more expensive than other rooms?
It can be, because of extra prep, specialist products and detailed cutting around fittings. See our Perth interior painting cost guide.
Need your bathroom painted properly?
Perth Painting Services provides interior painting, house painting and residential painting across Perth, including Bayswater, Morley, Balcatta and Joondalup.
Free quote: Contact us
Phone: 0434 675 004
Email: info@perth-painting-services.com.au
Hours: Mon–Fri 8am–6pm | Sat 9am–2pm | Sun & public holidays closed
