Koch-Chemie × COLOURLOCK COLOURLOCK "Filler" (Black) Sandable Leather Filler for Flexible Repair 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 levels out scratches, cracks and dents in dark leather and builds a solid, colour-matched base for paint and top coat.

COLOURLOCK Filler (Black) is a high-grade black leather filler for repairs on dark and black pigmented smooth leather. It's ideal for levelling out scratches, cracks, scuffs, worn spots and minor edge damage. Thanks to its black pigment, the filler blends straight into dark leather and makes the colour build-up that follows a lot easier — perfect for automotive leather, furniture, bags, shoes and trim parts.

• Made for dark leather – Black pigment keeps repair spots from showing up light.
• Finely sandable & dimensionally stable – For smooth, clean repair areas.
• Ideal base for colour & sealing – Lifts the finish noticeably.

Filler technology & how it works

Filler (Black) is built on a flexible, non-slumping filler formula that bonds firmly to the leather and, once dry, forms a tough repair layer. The black tint means repairs on dark leather stand out less and colour-match far better. The filler stays flexible enough to move with the leather, and once it's cured you can sand, smooth and texture it with no trouble.

Application, build-up & best practices

Before you start, clean and degrease the leather properly. You lay COLOURLOCK Filler (Black) down thin with a spatula, brush or a fine applicator tip. For deeper damage, build it up in layers, letting each one dry and giving it a light sand in between. Once the surface is level, you can match the colour with leather paint or Leather Fresh and seal it with Top Coat. Want more body? You can thicken the filler with Thickener.

Results, where to use it & the payoff

After the repair you're left with a smooth, even surface that blends right into dark leather. Filler (Black) is ideal for black car seats, steering wheels, door cards, furniture, bags and shoes. It's no substitute for a backing patch on deep cracks, but it's the perfect base for high-quality surface repairs on dark leather.

Common questions about COLOURLOCK Filler (Black)

Why a black filler?

It stops light spots showing through and makes repairs on dark leather easier.

Can the filler be sanded?

Yes — once dry it sands and smooths out beautifully.

Is Filler (Black) flexible?

Yes, it stays flexible and moves with the leather.

Do I have to colour it afterwards?

Yes, the filler is the base – you colour-match the surface after.

Does the filler work on faux leather?

Yes, it works well on many types of faux leather.

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