Pretrattamento e ritocco di COLOURLOCK

COLOURLOCK leather pre-treatment makes brittle leather repairable

What is COLOURLOCK pre-treatment and repair? The products used before adhesive, filler, and color: a water-soluble leather softener that replenishes dried-out fibers, a softening agent that loosens the stiffened fibers in decades-old leather, and a polish that removes light scratches from open-pored leather without the need for any color.

COLOURLOCK leather pre-treatment is the product group used prior to any repair. COLOURLOCK "Licker Oil" replenishes dry fibers and remains water-soluble so that color will adhere afterward. COLOURLOCK "Old Leather Softener" is pure oil used to loosen the bonded fibers in old, hardened leather. COLOURLOCK "Scratch Away" is part of the repair process and polishes light scratches out of aniline, grease, oil, and nubuck leathers, without a drop of color.

• The leather softener is mixed, not applied directly. One part COLOURLOCK "Licker Oil" to four parts warm water creates a milky solution that penetrates deep into the fibers. The water evaporates, leaving the oil between the collagen fibers. You can tell it worked if the surface accepts water-based color afterward instead of letting it bead up.
• Old leather becomes soft over a period of days. After each application, the softener needs at least 24 hours to rest at room temperature, accompanied by careful movement and kneading of the area to loosen the fibers. Up to three applications are intended, and one liter is enough for a completely dried-out vehicle interior.
• Not every scratch requires color. On aniline, grease, oil, and nubuck leathers, a light scuff is usually not a loss of material, but rather displaced fat. COLOURLOCK "Scratch Away" works it back into the area. For you, this means: no sanding, no color application, and no need to match colors.

Pro-tip from Detailing1: The most expensive mistake in this group is leaving oil in the leather — a recurring question we receive. Anyone who has softened a hardened classic car seat using the softener over three rounds is proud of the result and applies the color directly on top. Two weeks later, it rubs off again at the entry edge because water-based leather color cannot adhere to an oiled surface. This is exactly why the manufacturer's instructions state that you must degrease again before dyeing. Therefore, plan for the COLOURLOCK "Degreaser" as a fixed step; work it into the side bolster and entry edge for five minutes too long rather than one minute too short, and then check with your finger: the surface must look matte and feel slightly tacky.

Pre-treatment is not maintenance, even if both are oil

Maintenance oil is intended to stay in the leather. Pre-treatment oil is intended only to make the leather supple enough until adhesive, filler, and color can be applied.

Everything else follows from this one difference. Maintenance is the final state: you apply it, remove the excess, and leave the leather alone. A pre-treatment is an intermediate state that will be left behind. It may soften the leather, it may darken it, and it must be able to support the next product.

That is why COLOURLOCK "Elephant Leather Oil" is listed in the shop under Care for hardened leather and not here. It is intended for leather that is to remain as it is after treatment. The products in this group are intended for leather that will undergo further work. Same starting point, two different goals.

The fact that COLOURLOCK makes this distinction at all is due to their origins. The brand was established in 1995 at the Lederzentrum and has since been supplying saddlers and detailers whose workdays begin with cracked side bolsters and parchment-like classic car seats. Since October 2023, the leather specialist has been part of Koch-Chemie, and production was centralized in Unna during the course of 2024; you will therefore find this line in the shop under the vendor Koch-Chemie × COLOURLOCK.

For your purchasing decision, this is the most useful shortcut this category provides. If color, filler, or adhesive follows, choose from this group. If the leather is to remain as it is, move up a level to COLOURLOCK care.

Dry, hard, or lightened are three different tasks

The group is divided according to the condition of the leather, not the part in which it is installed.

The normal case before a color repair is leather that has become dry but is still sound. This is what the leather softener is for: COLOURLOCK "Licker Oil" replenishes the fibers before the sanding pad, spatula, and brush go to work, and it remains water-soluble so that the subsequent color does not land on a separating film. Available in 250 ml for individual repairs and 1000 ml / 1 liter for entire seat sets.

It gets one step tougher with the leather softener. COLOURLOCK "Old Leather Softener" is made for leather that cracks when bent: classic car seats, motorcycle saddles, furniture unused for decades. It loosens the bonded, solidified fibers, thereby reducing the risk of breakage before anyone even pulls on them. Also available in 250 ml and 1000 ml / 1 liter.

The third case is the only one where nothing else follows. The leather scratch remover COLOURLOCK "Scratch Away" is built for the light scuffs on aniline, grease, oil, and nubuck leather, such as those that occur on sofa edges, bags, and open-pored seats. It does not apply color; it polishes. The 100 ml bottle is intended for individual spots, the 1000 ml / 1 liter container for ongoing maintenance.

The order on the shelf follows the order of work. Softener and softening agent stand before the actual repair, the scratch remover stands alongside as its own short path. Anyone who knows which of the three cases they are facing has already made half the decision.

Water-soluble or pure oil determines what will hold afterward

The difference between leather softener and softening agent is not on the label. It is in the question of what comes after them.

COLOURLOCK "Licker Oil" is water-soluble and is therefore mixed: one part oil to four parts warm water until a milky solution is created. Water is the transport medium here — it seeps into the spaces between the fibers, takes the fat molecules with it, and subsequently evaporates. What remains is fat where it allows the fibers to slide against each other again. Practically speaking, this means the surface remains wettable, and the water-based leather color will hold later on.

COLOURLOCK "Old Leather Softener" takes the other path. It is pure oil, therefore greases significantly more effectively and reaches fibers that the diluted softener can no longer access. This is exactly why there are two products and not one: repair material adheres poorly to an oiled surface, so the softening agent strictly requires the degreaser afterward, whereas the softener can hand off directly to the color application phase.

COLOURLOCK "Scratch Away" follows neither logic. It adds nothing to the leather that is meant to stay there, and it removes nothing either. On open-pored leathers, when a scuff occurs, the leather's own fats and waxes move to the side, causing the area to lighten — the same principle that gives these leathers their pull-up effect. The polish redistributes them until the area reflects light evenly again.

From these operating principles follows an honest classification: none of the products is a substitute for another. The softener does not make rock-hard leather pliable, the softening agent does not prepare a surface for color, and the polish replaces neither the one nor the other. They solve three separate tasks that can occur side-by-side on the same seat.

Old leather becomes soft over days, not minutes

Both oils work slowly. Anyone checking after ten minutes will consider a product ineffective that has only just begun to work.

With the leather softener, it works like this: mix, apply the milky solution evenly to the cleaned area, let it absorb. Two applications are usually sufficient. Afterward comes the part that almost everyone wants to shorten — several days at room temperature before dyeing or repairing. During this time, the oil first distributes itself into the fiber structure, and exactly this determines whether the leather will hold up under the sanding pad.

The softening agent is applied with a sponge or soft cloth, ideally from the back of the leather because there is no topcoat to hinder it. Afterward, at least 24 hours of rest at room temperature, then carefully move and knead the area. Up to three such rounds are intended. For a completely dried-out vehicle interior, you need no more than one liter for this.

The polish is the fastest part of the group: a small amount of product on a soft cloth, rub it into the leather surface, carefully polish out the scratch in a circular motion. As with all products in this group, a test on an inconspicuous area, such as the underside of the seat, applies beforehand — not just for color, but also for the feel, because you cannot see a change in haptics in a photo.

When doing it for the first time, count on more calendar time than actual work time. A hardened seat from a vehicle that has been standing for a long time might occupy you for two hours spread over a week — the rest is waiting. Based on the inquiries we receive, this waiting time is exactly the point where most people lose patience and proceed too soon. This is not a question of skill; it is part of the process.

With us, repair fails more often due to the leather type than the product

The most frequent question about this group is not how to apply them. It is why they did nothing for the user's specific leather.

In most of these cases, the leather type does not match. COLOURLOCK "Scratch Away" is made, according to the manufacturer, for aniline, grease, oil, and nubuck leathers and expressly not for pigmented leathers. The reason lies in the mechanism: with pigmented smooth leather, the scratch is in the top layer, not in migrating fat — there is simply nothing there to be redistributed. For such areas, the path leads through fillers and leather color.

The second limitation concerns very old leather. Replenishing fat makes the fibers more supple. It does not restore lost fiber stability. A parchment-like seat that cracks when bent will become softer after three applications but will still remain thin. We have seen this on furniture leather from the seventies: supple enough for dyeing, too weak for the seat surface. If the carrier fabric is also gone or the foam has broken, the segment belongs to a saddler.

The third limitation is self-imposed by many. Udder fat, cooking oil, and fabric softener appear in every forum thread about hard leather, and we see the results regularly: fats that are not tailored for leather absorb uncontrollably, turn rancid over time, and leave behind a greasy film. Before a color repair, this film is the worst conceivable starting point because it can only be removed again with multiple degreasing rounds.

And one limitation lies in the sequence itself. Gaping cracks are closed before the softening agent is applied, not afterward — otherwise, you are working oil into an open fracture edge where the adhesive needs to hold later. Open-pored aniline leather, in turn, requires a suitable cleaner before polishing; the Aniline & Nubuck Cleaner is ready for that.

Your leather type and damage determine the entry point

Two moves are enough to decide: a drop of water on an inconspicuous area and a fingernail over the damaged surface.

If the drop soaks in and darkens the spot, you are dealing with open-pored leather. If the damage there is only a light scuff without the fingernail getting caught, COLOURLOCK "Scratch Away" is all the effort required — clean, polish out, done. If the drop beads up, the leather is coated, and for a scratch, the work instead starts with filler and color.

If the leather feels dry and dull and is to be dyed or repaired afterward, COLOURLOCK "Licker Oil" is the entry point. If it cracks when bending or feels like parchment, start one step earlier and work it soft over several days with COLOURLOCK "Old Leather Softener". Brittle leather that you fill without this step will tear again next to the repair site.

Afterward, the next station takes over. Degrease, prime, dye, seal — everything for this is available under Dyeing & Finish, which makes the pre-treated surface ready for color in the first place. The remaining steps of the line, from adhesive to putty, can be found one level higher: Back to COLOURLOCK repair.

The idea that holds this group together is uncomfortable: you never see what you gain during pre-treatment. No photo shows it, no customer praises it. Visible is only what would have happened without it — a freshly dyed bolster that rubs off after two weeks, or a crack that opens a second time ten millimeters next to the repair. The days you lose here are the months the repair will last later.