February 5, 2025 | 10 min read | Care & Maintenance
Why Kota Stone Needs So Little Maintenance
One of Kota Stone's most celebrated advantages is its extremely low maintenance requirement compared to marble, granite, or engineered stone. This is because Kota Stone is a dense, fine-grained limestone with very low porosity (under 0.5% water absorption) — meaning liquids and stains have a hard time penetrating the surface, and cleaning is rarely a battle.
That said, "low maintenance" does not mean "zero maintenance." Understanding the right way to care for your specific Kota Stone finish will ensure it stays beautiful for its full 50–100 year service life. This guide covers everything you need to know.
Daily & Weekly Cleaning (All Finishes)
The foundation of Kota Stone care is simple and the same for all four finish types:
- Daily: Sweep or dust-mop to remove grit and sand particles. Sand and grit are the primary cause of surface abrasion on all stone finishes — removing them daily prevents micro-scratching.
- Weekly: Damp-mop with clean water, or use a neutral pH (pH 7) stone cleaner diluted as directed. Wring the mop well — excess water sitting on stone is not ideal for grout lines.
- Always: Clean spills immediately with a clean dry cloth. The faster you act, the less chance of any staining.
Finish-Specific Maintenance Guide
Polished Finish Maintenance
Polished Kota Stone requires the most attentive care of all four finishes because the high-gloss surface makes scratches and etching more visible:
- Use only a neutral pH stone cleaner — never acidic cleaners, vinegar, or bleach which will etch the polished surface and dull the gloss.
- Place entry mats at doorways to prevent grit from being tracked onto the polished floor.
- Use furniture pads under all furniture legs to prevent micro-scratching when pieces are moved.
- Apply a penetrating stone impregnator sealer every 2–3 years to reduce porosity and stain risk in kitchen and dining areas.
- For gloss restoration after 5–7 years of use in high-traffic areas, engage a professional stone polisher for an on-site re-polishing treatment.
Honed Finish Maintenance
Honed (matte) finishes are significantly more forgiving than polished — minor scratches and wear marks are far less visible on a matte surface:
- Routine sweep and neutral pH damp mop is all that is required for day-to-day maintenance.
- For kitchens and bathrooms, apply a penetrating sealer once at installation and re-apply every 3–5 years.
- If the surface becomes dull over many years of heavy use, it can be professionally re-honed on-site — an affordable treatment that restores the original satin matte finish.
Natural Finish Maintenance
Natural finish is the easiest Kota Stone finish to maintain — it is the toughest, most forgiving, and most self-sufficient:
- For outdoor natural finish: simple periodic pressure washing is all that is ever needed. No chemicals, no sealers.
- For indoor natural finish: sweep and mop with clean water. Neutral pH cleaner for food-area floors.
- Algae or moss growth on outdoor surfaces: scrub with a mild diluted bleach solution once per year during the dry season, then rinse thoroughly.
- No sealers are needed for natural finish in outdoor or industrial applications.
Leather Finish Maintenance
Leather (brushed) finish falls between honed and natural in terms of maintenance requirements:
- Regular sweep and damp mop. The textured surface may trap a little more dust than smooth finishes — a soft brush attachment on a vacuum works well.
- For pool surrounds: rinse regularly with fresh water to remove chlorinated pool water and prevent mineral deposits.
- Seal pool surround leather finish stone with a penetrating waterproof stone sealer every 2 years.
Stain Removal Guide
| Stain Type | Treatment | Avoid |
|---|---|---|
| Oil / Grease | Alkaline stone degreaser + soft scrub pad | Bleach |
| Coffee / Tea | Hydrogen peroxide poultice (polished only) | Acidic cleaners |
| Turmeric / Curry | Immediate clean + dilute alkaline cleaner | Scrubbing with grit |
| Rust | Commercial rust remover / oxalic acid solution | Strong acids |
| Algae / Moss | Dilute bleach solution (outdoor only) | Bleach on polished stone |
| Paint | Carefully scrape dried paint + mineral spirits | Acetone on sealed surfaces |
| Efflorescence | Dry brush first, then dilute white vinegar (briefly) | Prolonged acid exposure |
What to Absolutely Avoid
These products and practices will cause permanent damage to Kota Stone:
- Acidic cleaners: Vinegar, lemon juice, toilet bowl cleaners, and bathroom tile cleaners with hydrochloric acid will etch and permanently dull any finish.
- Bleach on polished/honed stone: While bleach can be used sparingly on natural finish outdoor stone, it will discolour and damage interior polished surfaces.
- Steam cleaning: High-temperature steam can cause thermal shock to stone and weaken adhesive bond in tile installations.
- Abrasive scouring pads: Steel wool, scotch-brite, and similar abrasive pads will permanently scratch all Kota Stone finishes.
- Excessive water: Never flood the floor with water. Excess water can penetrate grout lines and cause sub-floor issues over time.
Annual Maintenance Checklist
- ? Inspect grout lines for cracks or deterioration — re-grout any damaged sections
- ? Check for cracked or hollow-sounding tiles — re-adhere using stone adhesive
- ? Re-apply penetrating sealer to polished and honed indoor floors (every 2–3 years)
- ? Pressure wash all outdoor natural finish stone areas
- ? Check and re-seal pool surround stone (every 2 years)
- ? Strip and replace any silicone sealant at wall-floor junctions if it has gone black or is peeling