Koch-Chemie × COLOURLOCK COLOURLOCK "Duller" matting additive for professional use 1000ml

COLOURLOCK Duller — matting additive for a clean, natural matte finish on leather & plastic

What does COLOURLOCK Duller do? — The matting additive knocks back the gloss of COLOURLOCK colours and top coats, gives you a natural, OEM-style matte finish and keeps repaired areas from looking greasy or patchy.

COLOURLOCK Duller is the pro matting additive for every COLOURLOCK colour and clear-coat system. You mix it straight into your colours or top coats to drop the gloss level and build a genuine, natural matte surface. With modern automotive leathers or matte furniture finishes, getting the gloss dialled in is what makes a repair or recolour blend into the rest — nobody should be able to spot it. Duller keeps the panel from going greasy, too shiny or blotchy once the repair is done.

• Even matting – No shiny spots, just a natural, factory-correct look across the surface.
• Adjustable – Tune the matte level by how much you add, so you can match the original spot on.
• Professional finish – Made for leather and plastic repairs on cars, furniture and interiors.

Matting technology & how it works in the colour film

Duller carries finely tuned matting particles that scatter light evenly and pull the gloss out of the coating film. As it dries it lays down a stable matte polymer film that won't wash out the colour or hide the grain. The chemistry is built so the leather coating keeps its flex — a big deal on bits that move, like seat bolsters, grab handles or trim parts. Koch-Chemie says the additive gets you an OEM-close finish even on the trickier matte levels of modern coated leathers.

Mixing, application & handling notes

You mix Duller straight into COLOURLOCK colours or top coats. The dose sets the final matte level: a little gives you a satin matte, more takes it deep matte. Go too heavy on the Duller, though, and you start to weaken the colour film, so it pays to creep up on the gloss level you want rather than dumping it in. Stir the mix through properly and lay it down soon after. Apply with a sponge, airbrush, gun or dabbing — whatever the job calls for. Spot on for steering wheels, seat faces, furniture edges and any repair where an even matte look is the whole point.

Results, where to use it & how it differs from Dull/Gloss products

Once it's done you get a natural matte, even finish with no shiny islands or greasy patches. Repairs sit in better and pretty much disappear. Duller earns its keep anywhere the original gloss has to be matched exactly: car interiors, furniture, bags, shoes, dashboards or plastic surfaces. It isn't a stand-in for Leather Fresh Dull — it's an additive for the colour mix, there to steer the matte level and light reflection precisely. For pure finish touch-ups with no colour mixing, reach for Leather Fresh Dull (Neutral) instead.

Common questions about COLOURLOCK Duller

Can I use Duller on its own?

No. It's only meant as an additive for colours and top coats.

How does the dose change the result?

More Duller = a matter finish. Creeping up on it stops you over-matting.

Does Duller change the colour coverage?

Minimally, maybe. Dosed right, the coverage stays stable.

Is Duller suitable for all COLOURLOCK colour systems?

Yes. It works in leather colours, Leather Fresh, top coats and plastic colours.

Can I combine Duller with Crosslinker?

Yes. The two work together in the mix: Duller for the look, Crosslinker for durability.

Last updated: 03/12/2025 — Author: Daniel (Detailing1)