Koch-Chemie × COLOURLOCK COLOURLOCK "Leather & Plastic Paste" Heat-Curing Filler Paste for Fast Repairs 1000ml

COLOURLOCK Leather & Plastic Paste — heat-curing filler paste for leather & plastic

What is COLOURLOCK Leather & Plastic Paste used for? — This heat-curing filler paste repairs deep cracks, holes and missing material in leather and plastic, and cures under heat into a particularly strong, hard-wearing repair.

COLOURLOCK Leather & Plastic Paste is a professional, heat-curing filler paste for repairing badly damaged leather and plastic surfaces. It's the one you grab for deep cracks, holes, breaks, chipped edges and missing material, where an ordinary filler just won't cut it anymore. Cure it with heat and you get a rock-solid, dimensionally stable base that you can then sand, texture, colour and seal.

• Heat-curing & high-strength – built for structural repairs that take real load.
• For leather & plastic – works across automotive and furniture jobs.
• A proper repair base – ideal for building up, shaping and finishing afterwards.

Heat-curing technology & how it works

Leather & Plastic Paste is built on a special polymer formula that only cures fully once you apply heat. Warm it up in a controlled way (a heat gun does the job) and it sets into a hard, tough structure that shrugs off heavy mechanical load. The paste barely shrinks, holds its shape and is brilliant for rebuilding edges, contours and missing material — on leather and on plastic alike.

How to apply it & best practices

Before you start, the surface needs to be clean, dry and grease-free. Work COLOURLOCK Leather & Plastic Paste into the damaged spot with a spatula or modelling tool and rough it into shape. Then cure the paste with heat, keeping it controlled. Once it's cooled, you can sand, smooth and texture the repair. Depending on the damage, you can build the paste up in layers. After that comes the colour build-up and the seal with Top Coat.

Results, where it fits & where it doesn't

Once cured, you're left with a very solid, hard-wearing repair that takes further work beautifully. Leather & Plastic Paste is right at home on car seats, door cards, centre consoles, steering wheels, furniture, plastic trim and interior parts. It's not a fine filler for light scratches — it's a structural repair paste for bigger damage. For fine surface touch-ups afterwards, reach for a classic filler or Super Filler.

Common questions about COLOURLOCK Leather & Plastic Paste

Why is the paste heat-curing?

The heat gives you maximum strength and dimensional stability for structural repairs.

Can I use the paste on plastic?

Yes, it's made specifically for leather and many plastics.

Can the paste be sanded?

Yes, very well once it's fully cured.

Do I need a backing patch?

For holes or bad cracks, a backing patch is recommended.

Can I colour it afterwards?

Yes, after sanding you can colour and seal the area as normal.

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