{"title":"Repairing cracks \u0026 holes in leather — COLOURLOCK","description":"\u003ch2 id=\"speakable-headline\"\u003eRepairing cracks \u0026amp; holes in leather as a build that carries load\u003c\/h2\u003e\n\u003cp id=\"speakable-definition\"\u003e\u003cstrong\u003eRepairing cracks \u0026amp; holes in leather\u003c\/strong\u003e is really about spreading the forces around the damage sensibly again. Colour on its own bonds no torn edges, and a thick plug rarely stays discreet on leather that moves. This COLOURLOCK selection gives you \u003ca href=\"\/products\/koch-chemie-colourlock-binder-neutral-neutrale-fuellfarbe\"\u003eBinder Neutral\u003c\/a\u003e for suitable brittle patches of leather, plus \u003ca href=\"\/products\/koch-chemie-colourlock-filler-white-leder-fuellstoff\"\u003eFiller White\u003c\/a\u003e and \u003ca href=\"\/products\/koch-chemie-colourlock-filler-black-schleifbarer-fuellstoff-leder\"\u003eFiller Black\u003c\/a\u003e for a thin, flexible build-up of level. Which route the repair actually takes depends on depth, access from behind and how hard the part gets used.\u003c\/p\u003e\n\u003cblockquote id=\"speakable-summary\"\u003e\n  \u003cp\u003e\u003cem\u003eA crack is a split that keeps moving; a hole is that plus missing surface. Both want stability first, level second and colour last of all. Binder can firm up suitable brittle zones; Filler White and Filler Black belong to the flexible filling stage. No filler replaces a backing patch the job needs, or a larger piece of leather that has gone missing.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLine of force:\u003c\/strong\u003e a seat bolster, a seam and a flat decorative panel each move the same centimetre of damage differently.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBacking:\u003c\/strong\u003e support underneath the defect carries the pull; filler on its own does not take that job on.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e only after that do thin layers bring level, colour and grain back into line.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eA crack is a joint; a hole is missing surface\u003c\/h3\u003e\n\u003cp\u003eStart by mapping the damage. A crack that sits only in the finish still shows no open leather fibre. A split that goes right through leaves two edges working against each other. With a hole, material is gone as well, so the pull no longer travels across the original surface. Three separate findings — and they must not all get the same build just because everyone calls them “cracks”.\u003c\/p\u003e\n\u003cp\u003eLook at length, width and the ends with the part relaxed. Narrow, tapering ends concentrate movement; the rounded rim of a hole spreads it differently. Do not tug at the spot to show yourself how deep it goes. Every bit of forced opening can snap more fibres and turn a repairable edge into a bigger gap.\u003c\/p\u003e\n\u003cp\u003eCheck the area around it with a light fingertip. Firm leather next to a clean split is a very different starting point from a zone that feels brittle, papery or delaminated over a wide area. Filler can bridge a dip, but it cannot bring back a substrate that is falling apart. There, the call is stabilisation or replacement first.\u003c\/p\u003e\n\u003cp\u003eWrite down how the part gets used. A seat bolster bends and rubs every time somebody climbs in. A hole on a rarely touched piece of furniture is mostly an optical problem. Damage on a seam, in an airbag area or on a steering wheel is structural or safety-relevant. Those areas do not get signed off by a cosmetic guide.\u003c\/p\u003e\n\u003cp\u003eMaterial and finish stay part of the diagnosis. The products described here only go onto suitable, checkable leather builds. Artificial leather can lift at its top layer, open-pore leather can drink liquid unevenly, and old repairs may be hiding under the colour you can see. If the build is unclear, the DIY route stops there.\u003c\/p\u003e\n\u003cp\u003eWhat comes out of this stocktake is a construction job, not a shopping list: does the surrounding leather need firming up? Does the split need support from behind? How much level is missing? Only once those questions are answered does Binder or Filler get a defined role.\u003c\/p\u003e\n\u003ch3\u003eThe back side: is the edge carrying again?\u003c\/h3\u003e\n\u003cp\u003eWith an opening that goes right through and keeps moving, a properly bonded backing patch can take the pull before you close up the visible side.\u003c\/p\u003e\n\u003cp\u003eFiller dropped between two edges that are free to move would have to carry every everyday movement on its own. That is not what it is there for. A backing patch that fits spreads the forces over a wider zone. Whether you can fit one, and how, comes down to access from behind, the state of the leather and the way the part is built.\u003c\/p\u003e\n\u003cp\u003eDo not push any old scrap of fabric through the hole. Thickness, flex and how well it takes adhesive all decide whether you end up with a hard rim or a visible bump later on. A patch that is too small concentrates the pull right next to the damage; one that is too thick telegraphs through the surface. That decision belongs inside a complete repair system.\u003c\/p\u003e\n\u003cp\u003eDo not force the crack edges together butt to butt. Aged leather can have shrunk, and missing volume is not something tension replaces. Pull the edges together while the part is relaxed and they may well open up again the moment it takes load. You want them sitting naturally, with no built-in pre-tension.\u003c\/p\u003e\n\u003cp\u003eOn a small hole the backing has to support the missing surface without stiffening the grain. On a shallow nick in the surface, backing may be unnecessary altogether. Depth of damage sets the effort, not a wish to get as much product as possible onto the job.\u003c\/p\u003e\n\u003cp\u003eSeams get their own verdict. If the thread has snapped or a stitch hole has torn out, the construction gets repaired before the surface is closed up visually. Filler over an open seam hides the problem but carries none of the original seam load. Perforations get the same care — their function must not end up filled in.\u003c\/p\u003e\n\u003cp\u003eIf you cannot get to the back safely, or the damage sits in a heavily loaded zone, having a leather repair specialist look at it is the smaller intervention. A backing patch that has gone wrong is harder to correct later than an opening nobody has touched yet. The structure underneath stays invisible, but it decides everything that goes on top of it.\u003c\/p\u003e\n\u003cblockquote class=\"praxistipp\"\u003e\n  \u003cp\u003e\u003cstrong\u003eMeasure the movement before you reach for filler.\u003c\/strong\u003e Stick two small paper markers next to the ends of the crack and load the part only as far as normal use would. If the edges drift noticeably apart, the spot needs more backing than a rigid decorative panel does. That one observation calls the shots before any filler, colour or sanding.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003ch3\u003eBinder firms up a zone without filling the hole\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/products\/koch-chemie-colourlock-binder-neutral-neutrale-fuellfarbe\"\u003eCOLOURLOCK “Binder Neutral”\u003c\/a\u003e is listed as a neutral filling colour for suitable brittle, cracked leather; it replaces neither a bonded patch nor missing surface material.\u003c\/p\u003e\n\u003cp\u003eBefore it goes on, the zone has to be clean, dry and prepped to suit. Old care product, grease and loose particles get in the way of later layers keying in. At the same time, cleaning must not take more brittle fibre off. So you prep the base gently, on the mildest route that fits.\u003c\/p\u003e\n\u003cp\u003eA test on a hidden patch tells you whether Binder shifts colour, feel or gloss, and whether the existing build stays stable. “Neutral” does not mean invisible, and it does not mean universal. With no pigment in it, the product is not a finished colour repair. Its job is preparatory firming inside a system that has been matched up.\u003c\/p\u003e\n\u003cp\u003eWork in thin layers, to the current product instructions. A thick coat can look closed on top while the base underneath is still moving or uneven. Thin coats let you keep the product on the brittle zone and check between stages. Every layer has to reach the state it should be in before the next one goes down.\u003c\/p\u003e\n\u003cp\u003eWatch the edges. If loose fibres are being bound without a hard step forming against the sound leather next door, you can carry on building the transition. If the zone lifts, goes tacky or darkens unevenly, this step ends here. Base, prep or application do not fit together yet.\u003c\/p\u003e\n\u003cp\u003eBinder is also no way to model a big missing piece of leather. Where there is no carrier left, the repair needs surface support or replacement material first. The neutral colour must not paper over the fact that mechanical stability and an optical match are two separate tests.\u003c\/p\u003e\n\u003ch3\u003eFiller builds level in a lot of thin layers\u003c\/h3\u003e\n\u003cp\u003eCOLOURLOCK \u003ca href=\"\/products\/koch-chemie-colourlock-filler-white-leder-fuellstoff\"\u003e“Filler White”\u003c\/a\u003e and \u003ca href=\"\/products\/koch-chemie-colourlock-filler-black-schleifbarer-fuellstoff-leder\"\u003e“Filler Black”\u003c\/a\u003e, which is listed as sandable, are there to cover suitable surface cracks and holes flexibly.\u003c\/p\u003e\n\u003cp\u003eFilling only starts once the edges and any backing underneath are stable. The first thin layer does not bond by sheer mass; it creates an even base. Further layers top up the missing level step by step. That way, after every drying point you can check whether the surface still flexes and whether the transition runs out flat.\u003c\/p\u003e\n\u003cp\u003eA thick coat looks quicker, but it brings two problems: it can be drier on the outside than in the middle, and it forms a rigid lump that shows up clearly in raking light. It also tempts you into heavy sanding, which usually takes sound colour off around the damage as well.\u003c\/p\u003e\n\u003cp\u003eChoosing between White and Black follows the system you are working in and the colour work that comes later, not the assumption that the filler is already the final shade. Both are building blocks. With Filler Black, sandability is explicitly part of the job description; even so, you only work the transition you have built up, rather than sanding healthy leather down to the level of the damage.\u003c\/p\u003e\n\u003cp\u003eCheck every layer with raking light and a fingertip. A slight dip can be topped up precisely on the next pass. A raised edge has to be smoothed off cleanly before colour makes even more of it. Grain can be adapted later depending on the repair technique; a solid plug never takes on convincing structure.\u003c\/p\u003e\n\u003cp\u003eTest the movement gently and no more. If the joint opens, fine break lines appear or an edge lifts, you do not simply keep filling. The fault sits deeper, in the way load is carried. More material on the visible side adds volume, not strength.\u003c\/p\u003e\n\u003cp\u003eQuantities and drying times come from the current instructions. Different layer thicknesses, room conditions and substrates make any universal number of minutes worthless. The safe constant: build thin, wait for each layer to get where it needs to be, and only then start the next stage.\u003c\/p\u003e\n\u003ch3\u003eColour and grain must not hide an unstable core\u003c\/h3\u003e\n\u003cp\u003eOnly a repair area that is dry, smooth and stable through the movement it is meant to see gets colour-matched to the aged leather around it.\u003c\/p\u003e\n\u003cp\u003eColour is the visible finish, not the load test. An opaque shade can calm fine edges and pores optically while a joint carries on moving underneath. So before you tint, check that the build stays closed through gentle everyday movement. Anything odd gets corrected now, not hidden after the finish.\u003c\/p\u003e\n\u003cp\u003eThe target shade takes its cue from the leather right next to it. Aged leather is rarely the same across a whole object. A colour that matches on paper can read too dark on a faded seat bolster. Thin, feathered coats of colour keep more depth than a small opaque disc with a sharp edge.\u003c\/p\u003e\n\u003cp\u003eGloss level is part of the match too. A technically smooth repair stands out as a shiny patch on a matt surround, and the other way round. Compare it in front light and in raking light. Care oil is no tool for a quick gloss correction, because it can affect how the base takes colour and protection.\u003c\/p\u003e\n\u003cp\u003eGrain calls for restraint. Artificial structure that is too deep often looks busier than a slightly simplified, neatly feathered zone. Looking right from normal viewing distance matters more than any individually traced pore. On valuable or large-area pieces, let a leather repair specialist reproduce structure and finish.\u003c\/p\u003e\n\u003cp\u003eAfter the colour comes protection that fits the system. It only goes on once the layers before it are completely ready. Care product that is incompatible or applied too early can shift the new surface. The \u003ca href=\"\/collections\/koch-chemie-colourlock-ratgeber-leder-aufbereiten\"\u003eleather restoration guide\u003c\/a\u003e puts these later stages in order.\u003c\/p\u003e\n\u003ch3\u003eThe load test starts smaller than everyday use\u003c\/h3\u003e\n\u003cp\u003eA finished repair gets brought back into movement in stages, with an eye on the edge, the surface and the leather around it.\u003c\/p\u003e\n\u003cp\u003eOnce everything is done, do not go straight to full seat load or a sharp fold. Move the part inside a small range first, below what normal use asks of it. Watch the old crack ends especially closely: that is usually where it starts to open again.\u003c\/p\u003e\n\u003cp\u003eChange the light and look for fine lines, raised edges and shifts in gloss. A stable repair stays closed and feels calm across the transition. Cracking noises, tacky spots or a shadow that keeps growing are no cosmetic trifles; they call for a break from use and a fresh look at the build.\u003c\/p\u003e\n\u003cp\u003eTake the original load off where you can. A seat bolster benefits from a different way of climbing in; hard objects should not be dragged over the same spot. On bags and cases, a fold that keeps sharpening can be relieved by design. The product repairs the damage, not the reason it moves.\u003c\/p\u003e\n\u003cp\u003eBig missing areas, badly disintegrating leather, load-bearing parts and safety-relevant zones stay outside any general DIY route. The same goes for an older repair with unknown adhesives or coatings in it. Here a professional diagnosis protects both the object and how repairable it stays later on.\u003c\/p\u003e\n\u003cp\u003eRecord the final state and look at it again after the first few uses. That shows you whether only the gloss is changing or whether a joint is genuinely working. Edge movement caught early is far easier to correct than damage that has opened up all over again.\u003c\/p\u003e\n\u003cp\u003eA result that holds is not an invisible patch at any price. It is a build where backing, fill level, colour and protection each do their own job. If you are serious about \u003cstrong\u003erepairing cracks \u0026amp; holes in leather\u003c\/strong\u003e, treat them as what they are: small structural repairs that happen to have a visible surface.\u003c\/p\u003e","products":[{"product_id":"koch-chemie-colourlock-binder-neutral-neutrale-fuellfarbe","title":"COLOURLOCK \"Binder\" (Neutral) — neutral filler for brittle, cracked leather","description":"\u003ch2\u003eCOLOURLOCK Binder (Neutral) — neutral filler for structural leather repairs\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eWhat does COLOURLOCK Binder Neutral do? — The neutral binder stabilises damaged leather surfaces, fills fine cracks and worn spots, strengthens the structure and forms the load-bearing base before colour-specific products like Leather Fresh or Fluid Leather go on.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eCOLOURLOCK Binder (Neutral)\u003c\/strong\u003e is the professional base coat for structural leather repairs. The binder firms up the top pigment layer, fills micro-cracks, masks light fibre damage and preps the leather so coloured products grip better afterwards and cover evenly. As the neutral version it carries no pigment and works purely for stabilisation, not colour correction. Ideal for cars, furniture, fashion and all pigmented smooth leather showing wear, scratches or early cracking.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStabilises weakened leather surfaces\u003c\/strong\u003e – Firms up the pigment layer and stops small cracks from opening up further.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvens out micro-structures\u003c\/strong\u003e – Fills fine worn spots and gives you a smoother surface as a repair base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeutral base for colour\u003c\/strong\u003e – No pigment, no tint – pure structural reinforcement before Leather Fresh or Fluid Leather.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eBinder technology \u0026amp; how it works in worn leather\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBinder Neutral\u003c\/strong\u003e uses flexible, high-grip binders that work into the damaged areas of the top coat and build a new, elastic structure right there. As leather turns microscopically brittle over time through friction and UV, the binder acts like a repairing „primer-filler“: it links loose pigment particles, closes small breaks and stops further fraying. Koch-Chemie says the layer stays elastic so the leather keeps its natural give. The neutral binder changes neither colour nor sheen — it just delivers the structural stability that makes the next colour coats grip far better.\u003c\/p\u003e\n\u003ch3\u003ePrep, application \u0026amp; the right repair sequence\u003c\/h3\u003e\n\u003cp\u003eBefore you use the \u003cstrong\u003eBinder\u003c\/strong\u003e, the leather should be cleaned and degreased thoroughly so the filler can work in evenly. You lay the binder down thin with a sponge, dauber or brush and build it up in several fine coats until the surface feels structurally sound again. Let it flash off briefly between coats so you don’t get uneven patches. On slightly deeper damage you can lightly sand in between to smooth things out. After the binder phase comes the colour build-up: Leather Fresh for light colour touch-ups or Fluid Leather for heavier repairs. Only on a stabilised surface will these products cover evenly and hold for the long run.\u003c\/p\u003e\n\u003ch3\u003eResults, typical uses \u0026amp; how it differs from coloured products\u003c\/h3\u003e\n\u003cp\u003eAfter application the area feels smoother, sturdier and far better prepped for a colour refresh. \u003cstrong\u003eBinder Neutral\u003c\/strong\u003e earns its place wherever there’s structural damage: seat bolsters, steering wheels, furniture edges, the high-wear zones of bags and jackets. It doesn’t replace a full colour repair — the coloured versions of the Binder range or Leather Fresh are ideal for that. Neutral is deliberately the „invisible“ base that dials in structure, firmness and grip. In the car interior especially it lays the groundwork so later repairs don’t flake or look blotchy.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon questions about COLOURLOCK Binder (Neutral)\u003c\/h2\u003e\n\u003ch4\u003eDoes the binder colour the leather?\u003c\/h4\u003e\n\u003cp\u003eNo. The neutral version carries no pigment at all and works only for structural stabilisation.\u003c\/p\u003e\n\u003ch4\u003eIs binder the same as leather paint?\u003c\/h4\u003e\n\u003cp\u003eNo. Binder is a filler and firming product. For colour touch-ups you use Leather Fresh or Fluid Leather.\u003c\/p\u003e\n\u003ch4\u003eHow many coats do you need?\u003c\/h4\u003e\n\u003cp\u003eOne to several thin coats depending on the damage. The key: always work sparingly and let it dry well.\u003c\/p\u003e\n\u003ch4\u003eCan I use binder without primer?\u003c\/h4\u003e\n\u003cp\u003eWith good grip conditions, yes. On tricky or silicone-heavy surfaces, Leather Primer beforehand is the way to go.\u003c\/p\u003e\n\u003ch4\u003eDoes binder make the repair last longer?\u003c\/h4\u003e\n\u003cp\u003eYes. Stabilised areas hold colour better and are less prone to cracking open again.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eLast updated: 02.12.2025 — Author: Daniel (Detailing1)\u003c\/small\u003e\u003c\/p\u003e","brand":"Koch-Chemie × COLOURLOCK","offers":[{"title":"Neutral \/ 1000 ml \/ 1 liter","offer_id":56320202899791,"sku":"D1-KCX-481-1L-01","price":49.99,"currency_code":"EUR","in_stock":true},{"title":"Neutral \/ 250ml","offer_id":56320202932559,"sku":"D1-KCX-481-250ML-01","price":18.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/481-1L-01_1.png?v=1762116834"},{"product_id":"koch-chemie-colourlock-filler-white-leder-fuellstoff","title":"COLOURLOCK \"Filler\" (White) Air-Drying Filler for Elastic Covering of Surface Cracks and Holes","description":"\u003ch2\u003eCOLOURLOCK Filler (White) — white leather filler for precise repairs\u003c\/h2\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cem\u003eWhat is COLOURLOCK Filler White used for? — The white filler evens out scratches, dents and cracks in light leather and builds a smooth, stable base for colour, structure and sealing.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eCOLOURLOCK Filler (White)\u003c\/strong\u003e is a high-grade \u003cstrong\u003ewhite leather filler\u003c\/strong\u003e for repairs on light pigmented smooth leathers. It handles scratches, cracks, worn spots, edge chipping or deep scuffs, and once it dries it leaves a stable surface you can sand down fine. The white colour means repairs on white or very light leather build up cleanly and colour-neutral — perfect for automotive interiors, furniture, bags, sneakers and accessories.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade for light leather\u003c\/strong\u003e – A \u003cstrong\u003ewhite leather filler\u003c\/strong\u003e lets you build colour-neutral, invisible repairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSands fine \u0026amp; stays stable\u003c\/strong\u003e – For smooth, load-bearing, even surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrabs on well\u003c\/strong\u003e – Perfect as a base for colour, binder and top coat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFiller technology \u0026amp; how it works\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFiller (White)\u003c\/strong\u003e is built on an elastic, firm filler formula that bonds deep into the leather and forms a tough repair layer. Once it goes on, the material cures to a solid but flexible structure that sands and works beautifully. That lets you even out dents precisely and model damaged spots cleanly. The white pigment stops dark backgrounds from showing through and makes an even colour coat easy on light materials.\u003c\/p\u003e\n\u003ch3\u003eHow to apply it \u0026amp; best practices\u003c\/h3\u003e\n\u003cp\u003eBefore you fill, clean and degrease the leather thoroughly. You lay \u003cstrong\u003eFiller (White)\u003c\/strong\u003e down thin with a spatula, scalpel, brush or fine applicator tip. On deep damage, build it up in layers, each with a drying and sanding step in between. Once the surface is smooth and level, you match the colour with leather dye or Leather Fresh and finish by sealing with Top Coat. You can also thicken the filler with Thickener if you want more body.\u003c\/p\u003e\n\u003ch3\u003eResults, uses \u0026amp; benefits\u003c\/h3\u003e\n\u003cp\u003eAfter the work, the repaired area looks smooth, even and colour-neutral — an ideal base for a perfect finish. \u003cstrong\u003eFiller (White)\u003c\/strong\u003e works on white car seats, steering wheels, furniture, sneaker leather, boots, bags and light interior parts. It doesn't replace a backing patch on deep cracks, but it's the best base for every visible surface fix on light leather.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon questions about COLOURLOCK Filler (White)\u003c\/h2\u003e\n\u003ch4\u003eWhy a white filler?\u003c\/h4\u003e\n\u003cp\u003eIt stops dark spots from showing through and lets you make colour-neutral repairs on light leather.\u003c\/p\u003e\n\u003ch4\u003eCan the filler be sanded?\u003c\/h4\u003e\n\u003cp\u003eYes, once it's dry it sands and smooths really well.\u003c\/p\u003e\n\u003ch4\u003eIs Filler (White) flexible?\u003c\/h4\u003e\n\u003cp\u003eYes, it stays elastic enough for the way leather naturally moves.\u003c\/p\u003e\n\u003ch4\u003eDo I need colour afterwards?\u003c\/h4\u003e\n\u003cp\u003eYes, the filler is the base — then comes leather dye or Leather Fresh.\u003c\/p\u003e\n\u003ch4\u003eIs the filler suitable for faux leather?\u003c\/h4\u003e\n\u003cp\u003eYes, it works very well on many types of faux leather.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eLast updated: 10.12.2025 — Author: Daniel (Detailing1)\u003c\/small\u003e\u003c\/p\u003e","brand":"Koch-Chemie × COLOURLOCK","offers":[{"title":"1000ml \/ 1 liter \/ White","offer_id":56584511881551,"sku":"D1-KCX-608-1L-01","price":176.99,"currency_code":"EUR","in_stock":true},{"title":"20 ml \/ White","offer_id":56584504213839,"sku":"D1-KCX-608-20ML-01","price":42.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/608-20ML-01_1.png?v=1765306083"},{"product_id":"koch-chemie-colourlock-filler-black-schleifbarer-fuellstoff-leder","title":"COLOURLOCK \"Filler\" (Black) Sandable Leather Filler for Flexible Repair of Surface Cracks and Holes","description":"\u003ch2\u003eCOLOURLOCK Filler (Black) — black leather filler for precise repairs\u003c\/h2\u003e\n\u003cblockquote\u003e\n\u003cp\u003e\u003cem\u003eWhat is COLOURLOCK Filler Black used for? — The black leather filler levels out scratches, cracks and dents in dark leather and builds a solid, colour-matched base for paint and top coat.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eCOLOURLOCK Filler (Black)\u003c\/strong\u003e is a high-grade black leather filler for repairs on dark and black pigmented smooth leather. It's ideal for levelling out scratches, cracks, scuffs, worn spots and minor edge damage. Thanks to its black pigment, the filler blends straight into dark leather and makes the colour build-up that follows a lot easier — perfect for automotive leather, furniture, bags, shoes and trim parts.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade for dark leather\u003c\/strong\u003e – Black pigment keeps repair spots from showing up light.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinely sandable \u0026amp; dimensionally stable\u003c\/strong\u003e – For smooth, clean repair areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal base for colour \u0026amp; sealing\u003c\/strong\u003e – Lifts the finish noticeably.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eFiller technology \u0026amp; how it works\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFiller (Black)\u003c\/strong\u003e is built on a flexible, non-slumping filler formula that bonds firmly to the leather and, once dry, forms a tough repair layer. The black tint means repairs on dark leather stand out less and colour-match far better. The filler stays flexible enough to move with the leather, and once it's cured you can sand, smooth and texture it with no trouble.\u003c\/p\u003e\n\u003ch3\u003eApplication, build-up \u0026amp; best practices\u003c\/h3\u003e\n\u003cp\u003eBefore you start, clean and degrease the leather properly. You lay \u003cstrong\u003eCOLOURLOCK Filler (Black)\u003c\/strong\u003e down thin with a spatula, brush or a fine applicator tip. For deeper damage, build it up in layers, letting each one dry and giving it a light sand in between. Once the surface is level, you can match the colour with leather paint or Leather Fresh and seal it with Top Coat. Want more body? You can thicken the filler with Thickener.\u003c\/p\u003e\n\u003ch3\u003eResults, where to use it \u0026amp; the payoff\u003c\/h3\u003e\n\u003cp\u003eAfter the repair you're left with a smooth, even surface that blends right into dark leather. \u003cstrong\u003eFiller (Black)\u003c\/strong\u003e is ideal for black car seats, steering wheels, door cards, furniture, bags and shoes. It's no substitute for a backing patch on deep cracks, but it's the perfect base for high-quality surface repairs on dark leather.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon questions about COLOURLOCK Filler (Black)\u003c\/h2\u003e\n\u003ch4\u003eWhy a black filler?\u003c\/h4\u003e\n\u003cp\u003eIt stops light spots showing through and makes repairs on dark leather easier.\u003c\/p\u003e\n\u003ch4\u003eCan the filler be sanded?\u003c\/h4\u003e\n\u003cp\u003eYes — once dry it sands and smooths out beautifully.\u003c\/p\u003e\n\u003ch4\u003eIs Filler (Black) flexible?\u003c\/h4\u003e\n\u003cp\u003eYes, it stays flexible and moves with the leather.\u003c\/p\u003e\n\u003ch4\u003eDo I have to colour it afterwards?\u003c\/h4\u003e\n\u003cp\u003eYes, the filler is the base – you colour-match the surface after.\u003c\/p\u003e\n\u003ch4\u003eDoes the filler work on faux leather?\u003c\/h4\u003e\n\u003cp\u003eYes, it works well on many types of faux leather.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eLast updated: 12\/12\/2025 — Author: Daniel (Detailing1)\u003c\/small\u003e\u003c\/p\u003e","brand":"Koch-Chemie × COLOURLOCK","offers":[{"title":"1000ml \/ 1 Litre \/ Black \/ Black","offer_id":56616818278735,"sku":"D1-KCX-539-1L-01","price":176.99,"currency_code":"EUR","in_stock":true},{"title":"20 ml \/ Black \/ Black","offer_id":56616818245967,"sku":"D1-KCX-539-20ML-01","price":42.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/3272\/7375\/files\/539-20ML-01_1.png?v=1765664040"}],"url":"https:\/\/detiiling1.com\/collections\/koch-chemie-colourlock-ratgeber-risse-loecher.oembed","provider":"Detailing1","version":"1.0","type":"link"}