Can I use Bathroom & Shower Cleaner on marble or natural stone?Updated 13 days ago
TL;DR: Generally yes on sealed marble and natural stone, but always spot test first. Bathroom & Shower Cleaner is mildly alkaline (pH ~8) and non-abrasive, which is gentler than acidic cleaners that etch calcium-based stone. Sealants vary across stone types and ages though, and unsealed or porous stone can react unpredictably. Spot test in a hidden area, keep contact time short, and rinse thoroughly. For cherished or expensive stone, check the supplier's care instructions first.
Is Bathroom & Shower Cleaner safe on marble and natural stone?
✓ Generally safe on sealed stone
Sealed marble, granite, travertine, limestone, engineered quartz. Bathroom & Shower Cleaner is mildly alkaline (pH ~8) and non-abrasive, gentler than acidic descalers or scouring cleaners. Spot test first, keep dwell short, rinse thoroughly.
When should I avoid using it on stone?
⚠ Skip on these
Unsealed or porous stone. Old or worn sealants (5+ years without re-sealing). Honed or matte finishes where residue shows. Heritage or bespoke stone (check with the stonemason). Anything you're not confident about. Use a dedicated stone-safe cleaner or plain water on a microfibre, and save Bathroom & Shower Cleaner for surrounding tiles and fixtures.
How do I spot test on stone?
✓ Four-step spot test
Pick a hidden spot. Corner of a tile, under a basin lip, edge of a benchtop. Somewhere you won't mind if the test goes wrong.
Spray, wait 60 seconds, rub gently. Soft microfibre only. No scrubbing, no abrasive pads.
Rinse and dry. Water rinse, clean dry cloth. Look at the spot under good light for dulling, discolouration, or etching.
Check again in 24 hours. Some reactions appear slowly. If the patch still matches surrounding stone after a day, you're clear.
What's the method for cleaning stone?
✓ Four-step cleaning method
Spray onto a soft microfibre. Not directly onto the stone. Reduces contact time and prevents pooling in grout lines or porous patches.
Wipe gently. Light pressure, soft microfibre only. No abrasive pads, no scouring.
Rinse with a clean damp cloth. Water rinse only. Removes any residue before it dries.
Dry immediately. Soft dry cloth. Don't let moisture sit on stone or pool in grout lines. Weekly shower walls fine with quick spray and rinse, benchtops always cloth-first.

Bathroom & Shower Cleaner · gentle on sealed stone
Sensitive Choice approved, Dermatest tested, Eczema Association recognised. 12 ingredients, pH 8, made in Australia.

New at Koh?
Bathroom & Shower Starter Kit pairs the formula with Foaming Spray Bottle, Ultra Pro Bathroom Mitt, and Bathroom Squeegee. Everything you need in one box.

Koh Perks · earn points on every order
Join 40,000+ Koh Perks members. Earn points on every purchase, refer a friend, and redeem for discounts on your next order. Find all the ways to save in one place.
Browse all Bathroom & Shower Cleaner articles
Last reviewed: April 2026

