About sandstone sealing
Sealing, done the right way.
Sealing is protection. Most natural stone is porous — an impregnating (penetrating) sealer soaks into the surface and lines the pores so water, oil and stains bead up and sit on top instead of soaking in. It does not change the look or add a film; it buys you time to wipe a spill before it becomes a stain, and makes daily cleaning easier.
Sandstone's open pore structure is the whole point — it grips underfoot and looks natural — but it means aggressive cleaning erodes the surface and film-forming sealers peel. Everything is done gently: low pressure, neutral or mild chemistry, breathable sealers.
On sandstone: Sandstone is sealed only with breathable impregnators — a glossy film coat traps damp and peels off the open pores.
The process
How sandstone sealing works.
Step 01
Test & clean
We test how absorbent the surface is and deep-clean it — a sealer applied over dirt seals the dirt in.
Step 02
Dry
The floor is left to dry fully; residual moisture stops the sealer penetrating.
Step 03
Apply
The right sealer for the stone and its use is applied evenly, worked in, and the excess wiped before it hazes.
Step 04
Cure & check
After curing we water-test the surface to confirm it is repelling, and give you the re-seal interval.
Why it's worth doing
The result you get.
- ✓Spills bead up instead of soaking in — far fewer stains
- ✓Easier daily cleaning; less scrubbing
- ✓Protects a fresh polish so it lasts longer
- ✓Breathable options for outdoor and damp areas that will not peel
- ✓Slows hard-water filming and efflorescence
When you need it
Is this the right service?
Seal after any polishing or restoration, when water no longer beads on the surface, before a stone floor goes into a kitchen or bathroom, or on new stone before it is used for the first time.
More for sandstone
Other sandstone services.
Sandstone — all services →
Cleaning, honing/polishing and sealing for sandstone floors, courtyards and cladding.
Sandstone Deep Cleaning →
Deep cleaning is machine-driven — a rotary or orbital scrubber with the correct chemistry lifts years of ground-in grime, detergent film, grease and biological growth that mopping only spreads around.
Sandstone Polishing →
Polishing removes the worn, dull top layer of a floor and rebuilds a clean, reflective finish.
The FloorCarePro standard
What every job includes.
Free Site Assessment
We assess the floor and identify the material before quoting, so you get the right service — not the most expensive one.
Professional-Grade Products
Diamond abrasives, 3M compounds and the correct sealer or coating for your surface — applied by trained specialists.
Fixed Written Quote
A clear price in writing after the site visit. No per-day surprises, no hidden extras.
Service Warranty
Our polishing, sealing and coating work is warranted, because we stand behind the result.
Frequently asked questions
Common questions, answered.
How often does stone need re-sealing?
Every 1–3 years indoors depending on traffic and cleaning, and every 2–3 years outdoors. The simplest test: drop water on the floor — if it darkens the stone instead of beading, it is time.
My sandstone has black algae, lichen and green biological growth in shaded / damp areas — can sealing fix that?
Yes — that is exactly what sealing addresses on sandstone. We confirm the cause on the free site visit and quote the fix in writing. Seal after any polishing or restoration, when water no longer beads on the surface, before a stone floor goes into a kitchen or bathroom, or on new stone before it is used for the first time.
How do I keep my sandstone looking good afterwards?
The essentials: sweep and rinse; only mild pH-neutral cleaner for washing; keep gutters and drainage clear so the stone is not permanently wet. We leave you a written care plan for the specific finish.
Sandstone Sealing