Koch-Chemie × COLOURLOCK COLOURLOCK "Duller" Matting Additive for Professional Use 1000ml

COLOURLOCK Duller — Matting Additive for Perfect, Naturally Matt Leather & Plastic Surfaces

What is COLOURLOCK Duller used for? — The matting additive specifically reduces the gloss of COLOURLOCK colours and top coats, ensures a naturally matt OEM finish, and prevents shiny or unevenly glossy repair areas.

COLOURLOCK Duller is the professional matting additive for all COLOURLOCK colour and clear coat systems. It is mixed directly into colours or top coats to reduce the gloss level and create an authentic, naturally matt surface. Especially with modern automotive leather or matt furniture surfaces, a precisely adjusted gloss is crucial so that repairs and recolouring visually blend into the overall picture. Duller ensures that surfaces do not appear shiny, too glossy, or uneven after repair.

• Even Matting – Prevents shiny spots and ensures a natural, factory-original surface appearance.
• Variable Adjustment – Depending on the quantity, the degree of matting can be finely dosed and optimally adapted to the original.
• Professional Finish – Ideal for leather and plastic repairs in automotive, furniture, and interior applications.

Matting Technology & Mechanism of Action in the Paint Film

Duller contains finely tuned matting particles that evenly refract light, thereby reducing the gloss level of the coating film. Upon drying, a stable, matt polymer film forms, which must neither dilute the colour nor obscure the texture. The technology is optimised to maintain the elasticity of the leather coating – an important factor for flexible materials such as seat bolsters, handles, or interior parts. According to the manufacturer, the additive enables an absolutely OEM-like finish, even with difficult matt levels of modern coated leather.

Mixing, Application & Processing Instructions

The Duller is mixed directly into COLOURLOCK colours or top coats. The dosage determines the final matt level: little additive = satin matt, more additive = distinctly matt. However, too much Duller can weaken the paint film, so a gradual approach to the desired gloss level is recommended. The mixture should be thoroughly stirred and processed promptly. Application is by sponge, airbrush, spray gun, or dabbing technique – depending on the application. Ideal for steering wheels, seating areas, furniture edges, and all repair areas where a matt, even look is essential.

Results, Application Areas & Distinction from Dull/Gloss Products

After application, a naturally matt, even finish is created without shiny spots or glossy areas. Repairs appear more harmonious and less visible. Duller is used wherever the original gloss needs to be precisely matched: car interiors, furniture, bags, shoes, dashboards, or plastic surfaces. It is not a substitute for Leather Fresh Dull, but an additive to the colour mixture to precisely control the degree of matting and light reflection. For pure finish corrections without colour mixing, Leather Fresh Dull (Neutral) is suitable instead.

Frequently Asked Questions about COLOURLOCK Duller

Can I use Duller neat?

No. It is exclusively intended as an additive for colours and top coats.

How does the dosage affect the result?

More Duller = more matt finish. A gradual approach prevents over-matting.

Does Duller change the colour coverage?

Minimally possible. With correct dosing, the opacity remains stable.

Is Duller suitable for all COLOURLOCK colour systems?

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

Can I combine Duller with Crosslinker?

Yes. Both work together in the mixture: Duller for appearance, Crosslinker for durability.

Last updated: 03.12.2025 — Author: Daniel (Detailing1)