Koch-Chemie × COLOURLOCK COLOURLOCK "Old Leather Softener" softener for hardened old leather 1000ml

COLOURLOCK Old Leather Softener — deep softener for hard, brittle old leather

What does COLOURLOCK Old Leather Softener do? — The softener works deep into old, hardened leather, brings back flexibility, lowers the risk of cracking and gets the material properly ready for further care or repair steps.

COLOURLOCK Old Leather Softener is the pro answer when old, dry or brittle leather needs to go soft and supple again. On classic cars, vintage furniture, saddles or smooth leather that's been left alone for years, the material slowly loses its natural fibre elasticity. The softener feeds oils and suppling agents straight into the deeper leather layers, cuts the risk of cracking and builds a solid base for repairs, care and colour work. Old Leather Softener works slowly but for keeps — perfect for any leather that has gone stiff and could tear under tension.

• Brings back suppleness deep down – Works into hardened fibres and clearly improves how the leather moves.
• Lowers the risk of cracks and tears – Ideal before colour refreshes or repairs, so brittle spots hold up better.
• A must for classic-car, furniture & vintage leather – Perfect for smooth leather that's gone neglected or bone-dry.

Softener technology & how it works in old leather

Old Leather Softener blends high-action oils and conditioning agents that slowly draw into the collagen structures of the leather. As leather ages, the fibres lose their internal moisture and flexibility; they harden, which can lead to micro-cracks, stiffness and splits. The softener releases that dry rigidity step by step, making the fibres supple again and bringing back natural movement. According to the maker, it works deep without leaving the leather greasy or making the surface patchy. Since old leather is often badly weakened, the softener acts like a rebuild of the inner structure before you can even think about repairs.

Prep, application & the best soaking routine

Before you start, the leather should be clean and bone-dry. You lay Old Leather Softener on generously but under control, with a brush, cloth or sponge. The effect isn't instant — it creeps in: the leather pulls the product in over hours or days, depending on how dry it is. On really hard spots it helps to flex the leather a little so the softener can work in deeper. Repeat coats 24 hours apart may be needed until you've got the suppleness you want. Only once the leather feels noticeably softer and more flexible should colour build-up, repairs or care products follow, so they don't fail on a brittle surface.

Results, where it fits & how it differs from care products

After the soaking phase, old leather feels far more flexible, less brittle and shows a more stable fibre structure. That lowers the chance of new cracks forming when you sit on it, stroke it or work it. Old Leather Softener suits classic-car leather seats, furniture, motorcycle saddles, antique leather goods and anywhere leather has dried out over decades. It doesn't replace care creams or colour preps: those come in only after the softening phase. The softener is purely for structural recovery — colour touch-ups should wait until the leather is elastic enough to carry them for good.

Common questions about COLOURLOCK Old Leather Softener

How long does the softener take to work?

Several hours to days, depending on how dry it is. Old leather often needs more than one coat.

Can I use it on all types of leather?

On all smooth leather, yes. Not suitable for nubuck or suede.

Does the softener darken the leather?

Slightly possible, especially on very dry leather. The effect usually evens out again after care.

Can I dye straight after the softener?

Only once the leather is flexible again and has no oil excess left. Only then will colour hold reliably.

How do I know enough softener has soaked in?

The leather bends again without cracking and feels clearly more supple.

Last updated: 02.12.2025 — Author: Daniel (Detailing1)