Can I use Universal Cleaner on stone, marble, or granite?Updated 11 days ago

Polished marble, polished granite, and engineered stone (including Caesarstone, Silestone, and Essastone) are the most forgiving with Koh Universal Cleaner because their sealed glossy finishes resist moisture absorption. Honed marble, honed stone, and softer porous stones like travertine and limestone need extra caution because they absorb liquid more readily and can darken or develop water marks. Always spot test in a hidden area regardless of the stone type, and always buff dry immediately after cleaning to preserve the finish. Koh Universal Cleaner is a higher alkaline solution, so for any unsealed or specialty stone, check the supplier's care guide before using it.

Spot test a hidden area first by spraying a small amount of Koh Universal Cleaner, waiting a few minutes, wiping, and checking for any change in colour, sheen, or texture. Spray Koh Universal Cleaner lightly onto the surface, wipe with light even pressure (don't scrub), and buff dry immediately with a clean Koh cloth. The key rule for any stone is never leave liquid to pool or sit on the surface. An Ultra Pro Cloth is ideal for the buff-dry step because it gives a streak-free finish with no lint and is highly absorbent. For polished surfaces, a final dry buff helps preserve sheen.

On polished surfaces, watch for any change in sheen such as matte patches, dullness, or haze. On honed or porous stone, watch for colour darkening (a sign the stone is absorbing liquid) or water marks left after the surface dries. Etching (tiny pits or dull spots) is rare with Koh Universal Cleaner but can happen on acid-sensitive stones if cleaning is too frequent or any cleaner is left to sit too long. Texture roughness or a grainy feel after cleaning is another signal that the stone has reacted. If any of these show up during a spot test or after a clean, stop and contact your stone supplier for a stone-specific cleaner.