Sealing tile grout · Perth
Your tiles wipe clean. Your grout doesn't.
Cementitious grout is the one porous line running right through your tiled floors and walls, and it soaks up everything the tile shrugs off. We seal it with JUMBOGUARD, the one and only next-generation sol-gel surface coating in Australia. It bonds into the grout itself, stays breathable and colourless, and is built to keep those lines clean for years.
The weak link between your tiles
Nobody's tiles go dark. Their grout does.
A glazed or porcelain tile is basically sealed already, so it barely stains. The cement grout between them is the opposite: sandy, porous and thirsty, laced with tiny channels that drink in whatever lands on them. That's the line that goes grey, then brown, then black, while the tile beside it still looks new. It isn't dirty grouting. It's unsealed grouting doing exactly what unsealed cement does.
On the floor
Mop water settles in the lines
Every mop pushes dirty, greasy water off the tile and straight into the grout, which is a hair lower and wide open. The tile dries clean. The grout keeps the grime. Traffic lanes and kitchen floors go dark first, right where everyone walks and looks.
In the shower
It goes green, then black
Wet, warm and rarely fully dry, shower and splashback grout is where soap scum, body oil and mould get a grip. Perth's hard water leaves a mineral film on top of all of it. Scrub as you like, an open pore just refills, so the black keeps coming back.
Why a cheap seal fails
The protection sits in the wrong place
A hardware bottle soaks a repellent down into the pore, below the surface you actually mop and scrub. So the easy-clean you can feel wears off the top first, while the chemistry is still stranded down in the grout where the brush never reaches. It fades quietly, with no sign it's gone.
How we seal it
We don't fill the grout. We bond into it.
Cement grout is, chemically, close cousin to concrete: a Portland-cement paste holding sand. That surface carries reactive sites our coating grabs onto, so JUMBOGUARD condenses into a genuine mineral Si-O-Si network bonded into the grout itself, the same family of bond that holds glass and stone together. Not a film laid over the lines. Not a repellent lost down the pore. A colourless coating built into the surface, exactly where the cleaning happens.
Bonds in, doesn't sit on top
It cures into the grout surface as a nano-thin mineral network, chemically integrated with the cement, not a coating painted across the lines that can peel, yellow or flake off in the shower. There's nothing sitting on top to fail.
Protection where the mop lands
The barrier sits right at the surface of the grout, where dirty water, soap scum and scrubbing actually act, not hidden a few millimetres down the pore where a penetrating sealer does its work well out of reach of the problem.
And the grout still breathes
Because it works at the surface instead of plugging the pores, moisture can still move through and dry out. A coating that seals a wet-area grout airtight traps water and salts behind it. Ours keeps the line repellent on top and open underneath.
Built for how grout is actually used
Grout doesn't fail in a lab. It fails in the cleaning.
A grout line lives a hard life: mopped, scrubbed, hit with bathroom sprays and bleach, splashed with grease, walked on and sometimes baked by sun through a window. Every one of those loads acts at the surface. That's exactly where we put the protection, and it's the whole reason it outlasts a sealer buried down the pore.
Cleaning & scrubbing
Survives the mop and the brush
The mineral network sits right at the grout surface, so it keeps working through the mopping, scrubbing and pressure cleaning that wear an ordinary seal off. It fades slowly and predictably, and renews with a top-up rather than a strip. A penetrating sealer strands its protection below the wear zone, so the top layer you actually clean is gone first.
Chemical cleaners
Designed for cleaning, not just water
The bonded inorganic surface stays stable through the routine alkaline bathroom and floor cleaners of real maintenance, the same exposure that breaks a pore-based sealer down from the inside. It is more resistant, not immune: harsh acids and neat bleach still shouldn't dwell on cement grout, but everyday cleaning it takes in its stride.
Sun & UV
Doesn't yellow the way a film does
On grout that catches sun through a window or runs across an alfresco, an organic film can yellow and chalk. Our coating is inorganic, so it carries nothing for UV to easily break down. It holds up under the sun that ages ordinary coatings, far more UV-resistant, though not UV-proof.
Grease & oil
Grease lifts instead of soaking in
Kitchen grease, cooking splatter and the oily soap scum in a shower are what turn grout dark and cling to it. A water-repellent-only sealer doesn't stop them. Ours is built so oil and grease sit on the surface and lift in cleaning instead of soaking into the line and setting.
The pillar in one line: we protect against the real-world use of the grout, the cleaning, the chemicals, the grease, because our protection is at the surface where all of that happens. A pore sealer's protection is down in the grout, where none of it reaches.
Proven, not promised
Sealed once, and it stays clean.
The test that matters isn't a splash of water on day one. It's whether the grout still shrugs off the mop and the mould a year and two years down the track. Our coating is built for that, and every job is registered so you're covered on the record, not on a promise.
- The protection is where the cleaning is. A dense mineral network at the grout surface, meeting the scrub, the spray and the grease head on instead of hiding down the pore.
- Stable through routine cleaning. The bonded inorganic surface holds up under the alkaline cleaners and mopping that hydrolyse and fail an ordinary pore sealer from the inside.
- Tested at independent houses. The JUMBOGUARD chemistry is tested and compliant through labs including TÜV Rheinland, SGS, Intertek and REACH.
Straight talk
What sealing grout won't do.
Sealing grout is one of the highest-value jobs we do, but it earns its keep by being honest about the edges. Here's where the line is.
It won't lift a stain that's already set
Sealing protects clean grout going forward. It can't reach back into a line that's already gone black in the pore and pull the stain out. So we clean and treat the grout first, then seal what comes back clean. If it won't clean up, we say so.
It's not a fix for failed grout
If the grout is cracked, crumbling, missing in patches or the mould has grown right through it, no sealer rescues that. That grout needs regrouting first. We'll tell you plainly which one you're looking at rather than seal over a problem.
It's not stain-proof or permanent
It's a long-lasting treatment, not a forever one. It makes the grout far more resistant and far easier to keep clean, and it tops up without stripping when it's due. It doesn't mean you never clean again, and strong acids or neat bleach left to dwell can still attack cement grout.
It doesn't recolour the grout
Our coating is colourless. If your grout has faded to a patchy, uneven shade, sealing keeps it clean but won't make it one fresh colour again. That's a grout colourseal, a different product and a different job, and we'll point you to it if that's what you want.
The real questions
Grout sealing, answered.
Does sealing grout stop it going black?
It keeps the pores in the grout closed to the dirt, grease and organic grime that turn it dark, so it stains far more slowly and cleans up far more easily. It's applied to clean grout, so it protects going forward. It won't lift a stain that's already set into unsealed grout, and it isn't stain-proof. On grout that's already gone dark we clean it back first, then seal what comes up clean.
Can you seal grout that's already stained or has mould?
We clean and treat the grout first. If it comes back to a sound, clean surface we can seal it and hold it there. If the grout is broken, missing or the mould has grown right through it, sealing isn't the fix, that grout needs regrouting first, and we'll tell you straight which one you're looking at.
Will sealing change the colour of my grout?
No. Our coating is colourless and non-pigmenting. Same colour, same finish. It's not a grout colourseal that recolours the lines a fresh shade, it's a clear mineral coating that bonds into the grout and changes only how it repels water, grease and dirt. If you want the grout recoloured, that's a different job and we can point you the right way.
Do I need to seal epoxy grout?
No. Epoxy grout is a resin, it's effectively non-porous and doesn't absorb the way cement-based grout does, so it rarely needs sealing. Our coating is built for cementitious grout, the sand-and-cement grout in most Perth homes, which is the porous kind that stains. Not sure which you've got? We'll check it at the quote.
How long does sealed grout last?
It's a long-lasting treatment, not a permanent one. It bonds into the grout and holds up through routine cleaning and mopping for years, degrading slowly rather than failing all at once, and it tops up over itself without stripping when it's eventually due. Every job is registered under a 10-year guarantee.
Can I just seal it myself with a bottle from the hardware store?
You can, and a hardware impregnator will slow water for a while. The difference is where the protection sits and how long it survives. A penetrating sealer soaks down into the pore, below the surface that actually gets mopped and scrubbed, so the easy-clean you can feel wears off first while the chemistry is still down in the pore. We bond a mineral coating at the surface where the cleaning happens, prep it properly, and back it with a registered guarantee.
Keep reading
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Seal the grout. Keep the lines clean.
We'll clean and seal your grout with the right JUMBOGUARD coating for a cement-based surface, registered under a 10-year guarantee. Confirmed price before you book.