Koch-Chemie × COLOURLOCK COLOURLOCK "Filler" (Black) Sandable filler for the elastic covering of surface cracks and holes 1000ml

COLOURLOCK Filler (Black) — black leather filler for precise repairs

What is COLOURLOCK Filler Black used for? — The black leather filler evens out scratches, cracks and depressions on dark leather, creating a stable, color-matched base for color and top coat.

COLOURLOCK Filler (Black) is a high-quality, black leather filler for repairs to dark and black pigmented smooth leathers. It is ideal for leveling scratches, cracks, scuffs, worn areas and minor edge damage. Thanks to its black pigmentation, the filler visually blends harmoniously into dark leather surfaces and significantly facilitates subsequent color application — perfect for automotive leather, furniture, bags, shoes and interior parts.

• Optimal for dark leather – Black pigmentation prevents light repair spots.
• Finely sandable & dimensionally stable – For smooth, clean repair surfaces.
• Ideal base for color & sealant – Significantly improves the finish.

Filler Technology & Mechanism of Action

Filler (Black) is based on an elastic, stable filler formula that securely bonds with the leather and forms a resilient repair layer after drying. The black coloring ensures that repairs on dark leather are less noticeable and can be better color-matched. The filler remains flexible enough to move with the leather and can be easily sanded, smoothed, and textured after curing.

Application, Coverage & Best Practices

Before application, the leather should be thoroughly cleaned and degreased. COLOURLOCK Filler (Black) is applied thinly with a spatula, brush or fine applicator tip. For deeper damage, a layered application with intermediate drying and light sanding is recommended. Once the surface is even, it can be color-matched with leather dye or Leather Fresh and then sealed with Top Coat. For more stability, the filler can optionally be thickened with Thickener.

Results, Areas of Application & Benefits

After the repair, a smooth, homogeneous surface is created that blends perfectly into dark leather. Filler (Black) is ideal for black car seats, steering wheels, door panels, furniture, bags, and shoes. It is not a substitute for backing deep cracks, but it provides the optimal basis for high-quality surface repairs on dark leathers.

Frequently Asked Questions about COLOURLOCK Filler (Black)

Why a black filler?

It prevents light bleed-through and facilitates repairs on dark leather.

Can the filler be sanded?

Yes, it is very easy to sand and smooth after drying.

Is Filler (Black) flexible?

Yes, it remains elastic and flexes with the leather.

Do I have to dye it afterwards?

Yes, the filler is the base - the surface is then color-matched.

Is the filler suitable for artificial leather?

Yes, it is very suitable for many types of artificial leather.

Last updated: 12.12.2025 — Author: Daniel (Detailing1)