Additivi tattili Soft e Wax Slip di COLOURLOCK

COLOURLOCK feel additives adjust the haptics of the finish

What are COLOURLOCK feel additives? Additives that are stirred into the top coat to determine how the finished surface feels: COLOURLOCK "Soft Slip" reduces friction and makes the finish velvety, while COLOURLOCK "Wax Slip" increases it to create the waxy, tactile feel of modern production leathers.

COLOURLOCK feel additives are haptic additives for the top coat layer of leather dyeing. They do not contain color and do not control gloss—they exclusively change how the surface feels to the touch. COLOURLOCK "Soft Slip" lowers the coefficient of friction of the top coat, allowing the surface to glide softly and smoothly. COLOURLOCK "Wax Slip" works in the opposite direction: rich, dry, and slightly grippy—just how matte automotive leather feels from the factory.

• The feel is mixed in, not applied. The feel additives come in 250 ml containers and are added to the ready-to-use top coat before the first cross-coat is sprayed. Applying a feel additive alone to a finished surface is ineffective: without the film in which it can embed itself, it lacks the environment in which it could take effect.
• Soft Slip reduces friction, Wax Slip increases it. It is the same control knob, turned in two directions. The result can only be assessed once the film has chemically cross-linked—it is thermally dry after one to two hours, but finished only after 24 to 48 hours. Anyone who touches it beforehand is measuring the wrong state.
• Adjustments are made on a test surface, not on the seat. Dosage determines intensity, and the data sheets provide a range for this, not a single value. Therefore, first paint a scrap piece or a hidden area—using the same substrate, the same number of layers, and the usual spray pattern from 15 to 20 centimeters at around two bar.

Practical tip from Detailing1: A feel additive does not repair a failed finish. We regularly receive inquiries about re-dyed seats that feel sticky and attract lint from every pair of jeans—and the reflex is then to stir in something to counter the stickiness. That is the wrong lever. Freshly painted leather becomes sticky if the film is applied too thick, dried too cold, or prepared without a cross-linker; for this, a cross-linker and patience help, not COLOURLOCK "Soft Slip". The additive is intended for cases where the buildup is technically sound and only the tactile feel is not yet right. Mixing both masks a processing error instead of fixing it.

The feel reveals the repair faster than the color shade

The tone is right, the gloss is appropriate, and the edge has faded cleanly. And yet, anyone who sits down notices that this seat bolster has been worked on.

This is because the hand tests differently than the eye. A half-shade deviation is noticeable under grazing light and rarely otherwise; a different coefficient of friction is immediately apparent because the skin detects differences in friction where the eye can no longer see anything. Friction means: how strongly a surface brakes what brushes over it. You notice this when the hand pulls differently over the repaired area than over the surrounding surface—sometimes it feels smoother, sometimes it suddenly grips.

This is exactly where this category comes in. Color brings the tone, the top coat brings resistance and gloss level, and the feel additives bring the touch. Only when all three controls are adjusted to the environment does the repair disappear—not only in the light but also under the hand.

Our experience from the inquiries we receive after dyeing work goes in the same direction: the color shade is rarely disputed. The complaint is that the seat "feels like paint," that the steering wheel has become smoother than before, or that the surface makes a noise when sliding that wasn't there before. These are all haptic issues, and all three originate in the last step of the process.

And it is the step that is most easily skipped. The surface looks finished after the top coat, the vehicle is meant to be returned, the feel is "okay for now." The feedback then comes not on the day of delivery, but two weeks later—when someone has gotten in and out a hundred times and the hand has assessed the surface.

Soft Slip makes it velvety, Wax Slip makes it waxy and grippy

Both additives work on the same spot: in the uppermost micrometers of the dried top coat. What they do there is opposite.

COLOURLOCK "Soft Slip" lowers the surface energy of the top layer. You can imagine it as a wafer-thin sliding layer that settles on the film surface during drying and offers the contact partner—palm, trousers, sleeve—fewer grip points. Practically: the surface feels soft and velvety instead of like paint, without creating a greasy shine. This is the choice for anything that is constantly touched and should feel pleasant: steering wheel rim, armrest, seat surface, furniture leather, bags.

COLOURLOCK "Wax Slip" works with fine wax particles that remain embedded in the drying film and microscopically roughen the surface. The smooth paint layer becomes slightly structured, and it feels dry and rich instead of smooth. In everyday life: this is exactly the grippy, waxy-looking feel that modern matte production leathers have—if you hit that, your repair will blend in visually and haptically with the original part.

The name is deliberately misleading here, so to be clear: "Slip" does not mean that COLOURLOCK "Wax Slip" makes the surface slippery. It creates grip. If you are looking for a seat surface where you don't slide around when cornering, this is the right choice—if you want a steering wheel that runs silky through your hand, go for the other.

Combining them works, and that is more than a compromise. Prepared together, the two result in a mixed haptic: the velvety softness of one, the dry grip of the other. Anyone with original leather in front of them that feels neither smooth nor rough, but both simultaneously, will reach the goal faster with a mixture than with one of the additives alone.

Why a leather seat creaks and a steering wheel looks greasy

The two most common haptic complaints about automotive leather are noise and gloss. Both have the same physical root—friction—and both can be influenced in the finish.

Creaking is caused by stick-slip: two surfaces stick briefly, tension builds up, then they release jerkily, stick again, and release again. This sequence in millisecond intervals is what you hear as creaking or squeaking. In a car, this happens where leather works against leather or leather against plastic: at the seam between the seat cushion and backrest, on the side bolster, at the seat belt buckle. In other words: a finish with a lower coefficient of friction lets the surfaces glide instead of grip, and the seat remains silent.

The greasy shine on the steering wheel has the opposite mechanism. Here, palms rub over the same spot for years, flattening the structure of the top layer and effectively polishing it. The smoothed surface reflects more light directly—it shines. In our experience, this is the most common motivation for re-doing a steering wheel at all: not a crack, but the shiny zones at ten and two o'clock, which make the mileage look older than it is.

When exactly this steering wheel is repainted, the choice of feel is not a luxury. A smooth top coat without an additive often feels harder and more slippery on the rim than the original leather once did—and the hand notices this at every traffic light. Adjusted to be waxy and grippy, it is closer to the factory condition; adjusted to be velvety, it runs more softly through the hand. Both are justifiable; the wrong thing is not to decide at all.

A side effect that almost no one considers: lint collection. A surface with high adhesion holds onto textile fibers, and beige seats look like they haven't been cleaned after every drive in dark jeans. A low-friction top layer releases the fibers again when you get out. This is not a cleaning issue, but a property that was decided in the mixing cup.

Stirred into the top coat, decided on the test surface

The feel additive is the last decision before the final work step. Everything before that—degreasing, priming, filling, dyeing—must be correct, otherwise the haptics become a secondary matter.

Preparation is done in this order: select the top coat in the desired base, adjust the gloss level via a mixture or the matting additive COLOURLOCK "Duller", stir in the feel additive, and lastly add the cross-linker fresh. The cross-linker is deliberately added last because the clock starts ticking from that moment: prepared material continues to react in the cup and should never go back into the bottle.

Mixing thoroughly is not a minor detail here. An additive that has only been swirled will distribute unevenly over the surface, and then the upper half of the seat will feel different than the lower half. Stir, don't shake—shaking draws in air bubbles that end up as tiny craters in the film. The modified top coat is then applied completely normally: spray gun, airbrush, or sponge, in thin cross-coats with intermediate drying.

The test surface is the actual work step, not the optional extra. From our own experience, a leather scrap or a hidden zone is worth it—seat underside, trunk side panel, back of a headrest—using the same substrate and the same number of layers as the visible area later. Do not touch it until it is fully cured. A fresh film always feels softer and grittier than the finished one, and anyone who judges after two hours will inevitably dose it incorrectly.

Two frameworks distort the result further, and neither is in any instruction manual: temperature and skin condition. Leather feels different when warm than when cold, and a hand that has just been exposed to solvents or gloves is useless as a measuring instrument. Therefore, compare the test surface and the original surface in the same room, at the same time, with the same hand. If the hand reports no transition, no one else has a chance to find your work.

What feel additives cannot do, and where the upholsterer takes over

The category is narrowly defined, and that is its strength. Anyone who uses it for more than it can do only shifts a problem to a later point.

A feel additive does not control gloss. COLOURLOCK "Wax Slip" lowers it minimally through the microstructure, while COLOURLOCK "Soft Slip" practically doesn't at all—anyone who wants a shiny surface to be matte should work with COLOURLOCK "Duller" or directly with the matte top coats. Likewise, a feel additive does not extend durability: abrasion resistance and water resistance come from the cross-linker, not the feel additive. And neither provides opacity; that lies in the color layer.

Nor are they independent products. Without a top coat, there is nothing for the additive to embed itself in—painted onto un-dyed, un-coated leather, it remains ineffective or sits on top as residue. If you want to make an intact, untreated leather surface more supple, you are looking for a leather sealant, which is made exactly for that purpose.

The substrate limit is the tougher one: open-pored aniline leather, nubuck, suede, and Alcantara cannot tolerate a closed paint film, so they cannot tolerate an additive in it either. They live from an absorbent, velvety surface, and any film-forming layer destroys that. For these substrates, the path is via the film-free color refreshers, not through the painting line.

Honestly classified, and this is experience from workshop practice: two cases do not belong in DIY. One is the predetermined breaking seams of side airbags—such a tear seam must not be painted over or stiffened, because even slightly increased tear resistance can delay deployment. That belongs in a specialist upholstery workshop with a certificate of expertise. The other is the color shade match itself: a production color can be mixed, but aged leather next to it is never the factory tone again. Anyone dyeing a single surface in the middle of a set is working against this difference—the feel additive makes the result more authentic, but it does not resolve the color transition.

Which feel additive matches your surface

The decision comes down to a single question: How does the surface right next to it feel? Everything else is dosage.

If the original leather feels dry, rich, and slightly resistant—the normal case for modern, matte automotive leathers—COLOURLOCK "Wax Slip" is the direct path. Seat cushions, side bolsters, armrests, and door panels typically run on this. If, on the other hand, the surface should run soft and silky through the hand, as is expected on steering wheels, furniture leather, bags, and high-quality interior zones, COLOURLOCK "Soft Slip" is the go-to. For surfaces that feel like both, both are prepared together and balanced via the test surface.

You do not need a feel additive if no top coat is sprayed at all. A single tired seat bolster on your own vehicle, refreshed without a spray gun, remains with the color refresher, which already includes color and finish. You can find the remaining adjusting screws for the final layer—gloss, cross-linking, viscosity, seam coverage—one level up under additives & auxiliaries, and the complete procedure before that under dyeing & finish.

And the trick that brings the most during comparison costs nothing: check the feel with the back of your hand, not with your fingertips. The fingertips are worn and calloused; the back of the hand perceives differences in friction much more finely. Stroke it over the original surface, then over your test piece—at the same moment, in the same room. If the hand reports no transition, no one else has a chance to find your work.