Porous tiles like travertine, marble, limestone, sandstone and some unglazed ceramics absorb moisture, stains, and grime much more easily than standard tiles. Cleaning them properly and sealing them correctly is the best way to protect their appearance and extend their lifespan.
Below is a simple and practical step-by-step guide that explains exactly how to clean porous tiles and how to seal them for long-term protection.
Quick Summary:
To give your porous tiles a good clean and a protective seal, start by giving the surface a quick brush off to clear away any loose dirt or debris & then wash the whole thing with a nice, gentle tile-safe cleaner, and make sure to give it a good rinse.
If there are any tougher stains to deal with, you might want to try using a mild soap, a bit of baking soda mixed into a paste, or a gentle alkaline cleaner, but always do a test patch on a bit of tile that will be hidden away first & steer clear of anything acidic like vinegar.
Once your tiles are scrubbed clean and properly dry (it can take anywhere from 48 to 72 hours after a big cleaning session), you can move on to applying a top-notch sealer designed for surfaces that soak up moisture – just follow the manufacturer’s guidelines on how to get it on there (it might be a roller, a brush or a spray) & let it fully cure before you do anything else.
How to Clean Porous Tiles
Cleaning porous tiles the right way prevents stains, removes grime, and creates the ideal surface for sealing.
You’ll need:
- soft broom or vacuum (with brush attachment)
- microfiber mop or cloth
- bucket of warm water
- pH-neutral cleaner or mild dish soap
- baking soda
- hydrogen peroxide (for tough stains)
- soft-bristle brush
Step 1: Remove loose dirt
Sweep or vacuum the tiles to remove dust, grit, and sand. Porous tiles scratch more easily, so removing abrasive debris is essential.
Step 2: Wash with a pH-neutral cleaner
Mix warm water with a few drops of mild dish soap or a pH-neutral floor cleaner.
Avoid harsh or acidic products like:
- vinegar
- lemon juice
- bleach
- heavy-duty degreasers
These can etch natural stone and damage the surface.
Use a microfibre mop or cloth to wash the tiles in small sections.
Step 3: Rinse thoroughly
Go over the tiles again using clean water only.
Any soap residue left behind can cause streaks or interfere with sealer absorption.
Step 4: Dry the tiles completely
Porous tiles hold moisture, so drying is critical.
Wipe the surface using a clean, dry microfiber towel and allow additional air-drying time if needed. The tiles must be fully dry before applying any sealer.
Step 5: Remove stubborn stains
For deeper marks, grout staining, or absorbed dirt:
- Use a baking soda paste
- Mix baking soda with a small amount of hydrogen peroxide
- Spread the paste over the stain
- Let it sit for 10 minutes
- Scrub gently with a soft brush
- Rinse
- Dry thoroughly
This method lifts stains without damaging the tile.
How to Seal Porous Tiles
Once the tiles are clean and fully dry, you can begin sealing.
You’ll need:
- penetrating/impregnating sealer
- soft cloth, roller, or applicator pad
- microfiber towels
- gloves
- good ventilation
A penetrating or impregnating sealer is recommended because it soaks into the tile rather than sitting on the surface, providing better long-term protection.
Step 1: Choose the right sealer
Use a sealer specifically designed for porous tiles or natural stone.
These sealers protect against moisture, stains, and everyday wear.
Step 2: Work in small sections
Apply the sealer in thin, even coats.
Small sections prevent the sealer from drying before it has time to soak in.
Step 3: Apply the first coat
Use an applicator pad, roller, or cloth to apply a thin, even layer across the tile surface.
Avoid flooding the tiles. Excess sealer can leave a cloudy finish.
Step 4: Wipe away excess sealer
After a few minutes, check the surface.
If the tiles appear wet, shiny, or streaky, buff off the excess with a clean microfiber cloth.
This helps the sealer dry evenly.
Step 5: Allow drying time
Follow the manufacturer’s recommended drying time.
Most sealers take 30 minutes–2 hours to dry between coats.
Step 6: Apply additional coats if needed
Highly porous tiles may require 2–3 coats for full protection.
Repeat the same thin, even application process for each coat.
Step 7: Let the sealer cure
Avoid moisture, cleaning, or foot traffic until the sealer has fully cured which usually takes 12–24 hours.
Ongoing Maintenance
To keep sealed porous tiles looking their best:
- Clean regularly with a pH-neutral cleaner
- Avoid acidic or abrasive products
- Wipe spills quickly
- Mop with minimal water
- Reseal every 12–24 months, depending on tile type and use
Regular maintenance helps preserve both the sealer and the tiles.
When to Consider Professional Help
Some porous surfaces, especially natural stone like travertine, marble, or limestone, may need professional cleaning or sealing if:
- The tiles are heavily stained
- Old sealer needs removing
- The surface has been etched
- The area is large or high-traffic
Professional equipment provides deeper cleaning and more even sealing, giving the tiles a longer-lasting finish.
Need Your Porous Tiles Cleaned and Sealed? Call Us Today!
Cleaning and sealing porous tiles is the best way to protect them from stains, moisture, and daily wear. By following the steps above, you can keep your tiles looking their best for years.
If you need help with tile cleaning or sealing, we’re here to assist with expert, reliable service across the Gold Coast.