Which surfaces can I use Diamond Sponges on?Updated 5 hours ago
TL;DR: Diamond Sponges work best on tough, hard surfaces. Avoid anything easily scratched, and always spot test in an inconspicuous area if you're unsure.
Last reviewed: April 2026
Which surfaces are Koh Diamond Sponges safe to use on?
Diamond Sponges are safe on oven walls, racks, trays, cooktop trivets, burner caps, tile grout, stone pavers, brick BBQ surrounds, heavily stained pot interiors, cast-iron grates, and steel grates. Stick to tough, hard, non-polished surfaces where the abrasive grit can do its work without risking the finish.
Oven and cooktop
Oven walls, racks, trays, and drip pans. Cooktop trivets, burner caps, and grates. Baked-on grease and carbonised residue. Skip the glass oven door and ceramic hobs.
Tile, stone, and heavy-duty
Tile grout, glazed tile, stone pavers, and brick BBQ surrounds. Heavily stained pot interiors, cast-iron pans, and steel BBQ grates. Pair with Universal Cleaner for the lifting work.
Which surfaces need a spot test first with Koh Diamond Sponges?
Spot-test on hard-anodised cookware, unglazed ceramics, matte natural stone, and satin or brushed metal finishes. Pressure and angle matter. Too firm and these surfaces can dull, scratch, or mark. Test Diamond Sponge in a hidden corner first with light pressure, and stop immediately if the finish changes.
⚠ Matte and unglazed finishes
Hard-anodised cookware, unglazed ceramic tile, matte natural stone, and concrete can mark under firm pressure. Go light and test first.
⚠ Brushed and satin metals
Brushed steel appliances and satin finishes can develop swirl marks if the abrasive runs across the grain. Always work in the direction of the brush lines.
Which surfaces should I never use Koh Diamond Sponges on?
Never use Diamond Sponge on glass, mirrors, ceramic hobs, chrome, polished stainless steel, copper, brass, plastic, acrylic, or fibreglass. These finishes will scratch permanently. Soft metals and coated surfaces like painted walls, polished timber, and non-stick cookware are also off-limits. Swap to a soft cloth or sponge for those jobs.
⚠ Scratch-prone finishes
Glass, mirrors, ceramic cooktops, chrome taps, polished stainless appliance exteriors, copper pots, and brass fixtures will all scratch under the abrasive coating.
⚠ Soft and coated surfaces
Plastic, acrylic, fibreglass bath tubs, painted walls, polished timber, non-stick cookware coatings, and enamel. Soft finishes mark instantly and coatings peel.
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