{"title":"Afsluitlaag tegen verkleuring van COLOURLOCK","description":"\u003ch2 id=\"speakable-headline\"\u003eOld discolorations return without the COLOURLOCK barrier layer\u003c\/h2\u003e\n\n\u003cblockquote id=\"speakable-summary\"\u003e\n\n  \u003cp\u003e\u003cem\u003eWhat is the COLOURLOCK barrier layer against discoloration? It is the isolation step in the dyeing process: COLOURLOCK \"Blocker\" applies a transparent barrier film between the substrate and the new color so that tire abrasion, ballpoint pen ink, adhesive residues, UV shadows, and mold traces do not migrate back through the fresh layer of color. Developed from leather repair practices, it is now under the umbrella of Koch-Chemie.\u003c\/em\u003e\u003c\/p\u003e\n\n\n\u003c\/blockquote\u003e\n\n\u003chr\u003e\n\n\u003cp id=\"speakable-definition\"\u003e\u003cstrong\u003eThe COLOURLOCK barrier layer against discoloration\u003c\/strong\u003e is the work step between cleaning and color application that DIY instructions almost always omit. COLOURLOCK \"Blocker\" dries into a thin, transparent insulating film that traps embedded dyes, fats, and plasticizers underneath it, rather than allowing them to be pulled back up by the fresh color. Two thin layers are sufficient, applied with a sponge or spray gun, with each dried individually.\u003c\/p\u003e\n\n\u003cul\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eBlocks exactly the legacy issues that pull new color back up.\u003c\/strong\u003e Tire abrasion, ballpoint pen and permanent marker lines, UV shadows, bleeding glue, and black mold are among the cases for which the Blocker was built. Without this intermediate layer, the stain will reappear on the surface after a few weeks, even if the dyeing was done cleanly.\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eTwo thin layers beat one thick one.\u003c\/strong\u003e Application is done in two passes with a sponge; each layer is dried individually with a hairdryer. While building up the color, the Blocker can be reapplied thinly if a problem area continues to show through. If applied too thickly, the surface becomes stiff rather than dense.\u003c\/li\u003e\n\n  \u003cli\u003e\n\n\u003cstrong\u003eTwo container sizes for two working methods.\u003c\/strong\u003e The 100 ml is enough for a single seat bolster, a steering wheel, or an armrest without an opened bottle aging on the shelf. The 1000 ml \/ 1 liter size is for complete sets and for application with a spray gun at high pressure.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cblockquote class=\"praxistipp\"\u003e\n\n  \u003cp\u003e\u003cstrong\u003ePractical tip from Detailing1:\u003c\/strong\u003e Perforated leather is the place where the barrier layer most often goes wrong. We regularly receive inquiries about ventilated seats where the rows of holes are clogged after dyeing: the Blocker runs into the perforation, dries there into small plugs, and the seat ventilation subsequently pulls noticeably weaker. The countermeasure takes five minutes and must happen before it dries — use a toothpick to poke through each row of holes while the film is still wet, and only then use the hairdryer. Anyone who drills through the dry surface instead will tear open the fresh barrier layer around each hole.\u003c\/p\u003e\n\n\n\u003c\/blockquote\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eDiscolorations migrate upward, not downward\u003c\/h3\u003e\n\u003cp\u003eFresh leather dye acts as a solvent for a few hours: it softens the old surface and reawakens the very discoloration it is actually intended to cover.\u003c\/p\u003e\n\n\u003cp\u003eThe leather industry calls this migration. Dissolved dyes, fats, and plasticizers follow the moisture gradient upwards, similar to how a drop of coffee on paper does not form its rim in the center, but on the outside where it dries. This means for you: after dyeing, the stain is no longer under the new layer, but inside it — and it becomes more distinct with every sunny day.\u003c\/p\u003e\n\n\u003cp\u003eThe time delay is the treacherous part. Immediately after dyeing, the surface looks uniform; the result seems complete. It takes weeks for the legacy residue to work its way through, and heat accelerates it: a seat in the summer sun will show in two days what takes half a year in winter. Those who skipped the barrier layer will notice this not on the day of the work, but in the next season.\u003c\/p\u003e\n\n\u003cp\u003eThe legacy issues this affects are well documented. Tire abrasion from the trunk, ballpoint pen and marker lines, UV discolorations on sun-exposed areas, bleeding adhesive from old repairs, and black mold on leather that has been damp for a long time are at the forefront. What they have in common is that cleaning only reaches them to a certain depth — the rest remains in the leather, waiting for the next solvent.\u003c\/p\u003e\n\n\u003ch3\u003eCOLOURLOCK \"Blocker\" serves as an insulating film between legacy residue and new color\u003c\/h3\u003e\n\u003cp\u003eThe barrier layer does not work chemically against the discoloration, but spatially: it cuts off its path upwards instead of dissolving it.\u003c\/p\u003e\n\n\u003cp\u003eCOLOURLOCK \"Blocker\" is applied to the dry surface after cleaning and dries to a thin, transparent film. This film is dense enough to keep embedded dyes and fats beneath it, and remains open enough so that filler, leather dye, and finish subsequently adhere cleanly to it. In practice, this means: you lose neither adhesion nor texture and gain a separation layer that was not there before.\u003c\/p\u003e\n\n\u003cp\u003eApplication is done in stages. For individual areas, work with the sponge in dabbing motions, two layers, each dried thoroughly with a hairdryer. For large-scale work — a complete seat set, a sofa landscape — a spray gun at high pressure is the method to achieve a thin and uniform film. And if a problem area continues to show through during the color buildup, the Blocker can be reapplied thinly in between, always with drying in between.\u003c\/p\u003e\n\n\u003cp\u003eEqually important is what the Blocker is not. It does not clean, it does not fill cracks, and it does not replace a top coat. It has a single, clearly defined task in the dyeing sequence: the separation between what was and what is to come. This limitation is exactly what makes it reliable — a product that also intended to condition or seal at this stage would dilute the barrier effect.\u003c\/p\u003e\n\n\u003ch3\u003eBarrier layer and adhesion promoter solve two different tasks\u003c\/h3\u003e\n\u003cp\u003eBoth are listed in the product range under leather primers; both are applied to the surface before the color. That is where the similarities end.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-faerben-haftvermittler\"\u003eadhesion promoter from COLOURLOCK\u003c\/a\u003e works in depth: COLOURLOCK \"Leather Primer\" penetrates the finishing — the lacquer-like color and protective layer on pigmented smooth leather — and creates an adhesion bridge there for the leather dye. It remains soft to the touch and reduces color consumption because the dye no longer runs into an absorbent substrate. Its job is bonding.\u003c\/p\u003e\n\n\u003cp\u003eThe Blocker does the opposite: it lays on top as a closed film because separation is its job. That is why the data sheet lists a sequence that surprises many — no primer comes before the Blocker. Anyone who applies the adhesion promoter first works against the purpose of the barrier layer and later wonders about a bleed-through they thought they had prevented at great expense. On plastic parts in the interior, the \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-faerben-kunststoff-grundierung\"\u003eplastic primer from COLOURLOCK\u003c\/a\u003e takes over, not a leather product.\u003c\/p\u003e\n\n\u003cp\u003eWhat we at Detailing1 observe again and again: customers order the adhesion promoter and fully expect it to handle the bleed-through as well. The follow-up question comes three weeks after the dyeing, when blue shadows reappear on a beige seat surface. Anyone who has both products on the shelf saves themselves this detour — they are two tasks, and they need two bottles.\u003c\/p\u003e\n\n\u003ch3\u003eFirst remove, then block, then dye\u003c\/h3\u003e\n\u003cp\u003eThe barrier layer is step three, not step one. What can be removed is removed beforehand — the Blocker is there for the rest, not for a shortcut.\u003c\/p\u003e\n\n\u003cp\u003eAt the beginning is degreasing: the \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-reinigung-entfetter\"\u003edegreaser from COLOURLOCK\u003c\/a\u003e removes skin oils, care product residues, and silicone films so that anything can adhere at all. If a visible discoloration is sitting in the color layer, it belongs to the \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-reinigung-verfaerbungsentferner\"\u003ediscoloration remover from COLOURLOCK\u003c\/a\u003e before being blocked: every gram of dye that goes into the cloth now cannot migrate upwards later. Afterward, the surface must dry completely — residual moisture under the barrier film is the second most common cause of rings.\u003c\/p\u003e\n\n\u003cp\u003eThen the Blocker comes in two thin layers with drying in between, and only then does the color buildup begin: filler for brittle areas, then the opaque \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-faerben-lederfarben\"\u003eleather dyes from COLOURLOCK\u003c\/a\u003e in several thin coats instead of one heavy one. The conclusion is the \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-faerben-top-coat\"\u003eTop Coat \u0026amp; Finish from COLOURLOCK\u003c\/a\u003e as a wear layer, via which the gloss level and feel are also set — matte, glossy, or high-gloss, if necessary adjusted with matting additive, feel additive, or crosslinker.\u003c\/p\u003e\n\n\u003cp\u003eFrom the daily Detailing1 routine: The most common reason for a disappointing result is not the wrong product, but a schedule that is too tight. The complete process from degreasing to top coat is half a day for two front seats, with drying breaks that cannot be shortened. The first time, it feels long, and that is normal — by the second seat, every move is instinctive, and the effort is cut in half.\u003c\/p\u003e\n\n\u003ch3\u003eThe barrier layer does not save every case\u003c\/h3\u003e\n\u003cp\u003eThe Blocker is a specialist, and specialists have sharp boundaries. You should know three of them before you order.\u003c\/p\u003e\n\n\u003cp\u003eThe first limit is the substrate. The barrier layer belongs on pigmented smooth leather with intact finishing — i.e., on leather that already carries a top layer. Open-pored aniline leather, nubuck, and suede absorb any film-forming application and lose exactly what defines them: the soft, matte, breathable surface. There, the Blocker is not a lifeline, but the fastest way to a stain that looks worse than the original.\u003c\/p\u003e\n\n\u003cp\u003eThe second limit is safety-relevant and non-negotiable. Seat flanks of modern cars house the tear seam of the side airbag, and this seam must open upon deployment. Dye and barrier layers must neither stiffen nor glue them together. If your damage is on or directly at this seam, this is not a case for chemistry from a bottle, but for an upholsterer or a leather restorer who opens and resets the seam professionally.\u003c\/p\u003e\n\n\u003cp\u003eThe third limit is what we see most often, and it is a real negative: non-degreased surfaces. We often see seats where the Blocker was applied cleanly, but the surface was only wiped off instead of degreased beforehand. After four to six weeks, matte halos appear around the contact zones — the film never bonded properly because it was lying on skin fat. The same applies to application that is too thick: two wafer-thin layers keep it sealed, one heavy one makes the surface stiff and clogs the perforation.\u003c\/p\u003e\n\n\u003cp\u003eAnd an honest assessment of the result: The Blocker prevents bleed-through; it does not match a color tone. For a surface in the direct field of vision — seat center, armrest, door panel — color matching is the most demanding part of the whole work, not the chemistry underneath. Anyone who dyes an entire seat surface in one go has it easier than someone who wants to fit a palm-sized spot invisibly into an aged environment.\u003c\/p\u003e\n\n\u003ch3\u003eWhen the barrier layer belongs in your shopping cart\u003c\/h3\u003e\n\u003cp\u003eThe decision does not depend on the leather, but on its history. If you know what the area has seen before, you also know whether it needs to be blocked.\u003c\/p\u003e\n\n\u003cp\u003eIf light-colored seats show jeans blue that cleaning only partially removes, the Blocker belongs between cleaning and color. If ballpoint pen, permanent marker, or adhesive residues from an old repair are involved, likewise. If a vehicle has been smoked in for years or has been damp for a long time, even more so. And if a surface has been dyed before and the old stain returned, the missing barrier layer is the most likely cause. If, on the other hand, clean, merely faded leather receives a pure color refreshment, you do not need it — then the Blocker is a work step you can skip.\u003c\/p\u003e\n\n\u003cp\u003eWhen choosing the container size, the area decides, not the requirement. The 100 ml covers the classic individual cases: a seat bolster, a steering wheel, an armrest, a door panel. The 1000 ml \/ 1 liter is intended for complete sets and for everyone who works with a spray gun — consumption per area is higher there, but the film is more uniform. You can find all preparation products one level higher under \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-faerben-leder-grundierung\"\u003eLeather Primer from COLOURLOCK\u003c\/a\u003e, the complete sequence under \u003ca href=\"\/nl\/collections\/koch-chemie-colourlock-faerben\"\u003eDyeing \u0026amp; Finish from COLOURLOCK\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe test step that is in no instruction manual costs one day and, in case of doubt, saves you the entire job: Apply your dyeing process first on a hidden area — seat underside, backrest, bottom side bolster —, then park the vehicle in the heat for one sunny day and check in the evening. Migration is temperature-driven, and what does not come through in 24 hours under heat will not come through in the summer either. This one test area is the difference between a dye job that holds and one that you do a second time next season.\u003c\/p\u003e\n","products":[{"product_id":"koch-chemie-colourlock-blocker-sperrschicht-verfaerbungen","title":"COLOURLOCK \"Blocker\" sperlaag tegen doorslaande verkleuringen","description":"\u003ch2\u003eCOLOURLOCK Blocker — sperlaag tegen verkleuringen op leer\u003c\/h2\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cem\u003eWaar gebruik je COLOURLOCK Blocker voor? — De Blocker legt een isolerende sperlaag op leer die voorkomt dat verkleuringen, doorslag of kleurmigratie uit de ondergrond naar de oppervlakte komen.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eCOLOURLOCK Blocker\u003c\/strong\u003e is een speciale sperlaag die je vóór het verven of sealen aanbrengt om verkleuringen en doorslag van kleur betrouwbaar tegen te houden. Juist bij lastig leer – na het weghalen van jeansafgifte, bij oude reparaties, nicotineverkleuring of sterk vervuilde oppervlakken – houdt de Blocker restpigment of opgeloste kleurstoffen tegen zodat ze later niet opnieuw doorkomen. Zo krijg je een schone, stabiele basis voor een kleurresultaat dat blijvend gelijkmatig blijft.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffectieve sperlaag\u003c\/strong\u003e – Blokkeert verkleuringen, doorslag en kleurmigratie.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeale reparatiebasis\u003c\/strong\u003e – Stabiliseert lastige ondergronden vóór het verven.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOnmisbaar bij probleemleer\u003c\/strong\u003e – Ideaal na GLD Solvent, grondige reiniging of ontvetting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eSpertechnologie \u0026amp; werking\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBlocker\u003c\/strong\u003e legt na het aanbrengen een dunne, transparante isolatiefilm die voorkomt dat achtergebleven kleurstoffen, olieresten of vervuiling uit diepere lagen naar boven migreren. Die barrière is doorslaggevend als het leer eerder grondig gereinigd, ontkleurd of chemisch behandeld is. De Blocker stabiliseert het oppervlak zonder het te sealen zoals een Top Coat, en blijft open genoeg zodat de kleur- of finishproducten erna goed hechten.\u003c\/p\u003e\n\u003ch3\u003eToepassing, aanbrengen \u0026amp; best practices\u003c\/h3\u003e\n\u003cp\u003eNa grondig reinigen of na producten als Degreaser of GLD Solvent zet je \u003cstrong\u003eCOLOURLOCK Blocker\u003c\/strong\u003e dun en gelijkmatig aan met een spons of via sprayen. Laat de laag volledig drogen voordat je kleur, Leather Fresh of lederverf aanbrengt. Bij extra kritische klussen kan een tweede dunne laag zinvol zijn. Belangrijk is een gelijkmatige laag, zodat de sperwerking over het hele vlak constant blijft. Daarna kun je de normale kleur- en finishopbouw doen.\u003c\/p\u003e\n\u003ch3\u003eResultaat, toepassingen \u0026amp; afbakening\u003c\/h3\u003e\n\u003cp\u003eNa het aanbrengen blijft het leeroppervlak kleurstabiel en vrij van terugkerende verkleuringen. \u003cstrong\u003eCOLOURLOCK Blocker\u003c\/strong\u003e is ideaal voor automotive leer, meubels, tassen en interieurdelen met een bekend doorslagprobleem. Het is geen reiniger, geen filler en geen Top Coat, maar een voorbereidend product dat tussen reiniging en kleur in gaat. Juist bij licht leer is de Blocker doorslaggevend voor een blijvend schoon resultaat.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eVeelgestelde vragen over COLOURLOCK Blocker\u003c\/h2\u003e\n\u003ch4\u003eWanneer heb ik een blocker nodig?\u003c\/h4\u003e\n\u003cp\u003eAltijd als je verkleuringen of doorslag van kleur verwacht na het verven.\u003c\/p\u003e\n\u003ch4\u003eIs blocker zinvol bij licht leer?\u003c\/h4\u003e\n\u003cp\u003eJa, juist bij licht leer voorkomt hij dat donkere schaduwen later terugkomen.\u003c\/p\u003e\n\u003ch4\u003eKan ik daarna meteen verven?\u003c\/h4\u003e\n\u003cp\u003eJa, zodra de Blocker volledig droog is.\u003c\/p\u003e\n\u003ch4\u003eVervangt blocker de Top Coat?\u003c\/h4\u003e\n\u003cp\u003eNee. Blocker is een sperlaag, Top Coat is de finale bescherming.\u003c\/p\u003e\n\u003ch4\u003eKan blocker op alle leer?\u003c\/h4\u003e\n\u003cp\u003eOp gepigmenteerd glad leer wel. Niet voor nubuck, suède of anilineleer.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eLaatst bijgewerkt: 11.12.2025 — Auteur: Daniel (Detailing1)\u003c\/small\u003e\u003c\/p\u003e","brand":"Koch-Chemie × COLOURLOCK","offers":[{"title":"1000 ml \/ 1 liter","offer_id":56616626389327,"sku":"D1-KCX-603-1L-01","price":79.99,"currency_code":"EUR","in_stock":true},{"title":"100ml","offer_id":56616626422095,"sku":"D1-KCX-603-100ML-01","price":31.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/603-1L-01_1.png?v=1765658063"}],"url":"https:\/\/detailing1depot.com\/nl\/collections\/koch-chemie-colourlock-faerben-sperrschicht.oembed","provider":"Detailing1","version":"1.0","type":"link"}