Waterborne 2K anti-graffiti lacquers for vinyl and synthetic leather

Waterborne two-component anti-graffiti lacquers run at a pot life of over eight hours, applied by anilox roller or doctor blade and dried at 140 C for one minute.

Those three numbers decide whether the system fits a synthetic leather line. Everything else about an anti-graffiti finish is performance, and performance is the easier half.

What the system is

A transparent two-component acrylic topcoat for PVC and PU synthetic leather, supplied in three sheens: matt, more matt, and gloss. Each is catalyzed with a matching crosslinker, and the crosslinked film is what carries the resistance.

The published grades are ROWAKRYL M-35200W matt, M-35252W more matt, and G-35294W gloss, each with ROWASET 63762 as the catalyst. The W in the grade code marks the waterborne version.

The catalyst is part of the specification

A two-component system reaches its stated scratch, solvent, and chemical resistance only when it is crosslinked, which means the matching crosslinker at the stated addition level. The base can be coated on its own. It will run through the line, dry, and look right on the roll, and it will not pass a cleaning test.

Treat the crosslinker as a line item in the specification and on the purchase order rather than as a consumable ordered separately. It is the same reason a 2K finish is quoted as a system: the two parts are one product.

Pot life sets how you batch

Over eight hours of pot life is the figure that makes 2K workable on a production line. It covers a shift, so a coater mixes against the run rather than against a short window, and a stoppage does not automatically cost the batch.

The window is still a window. Mixed material has to be used inside it, so the practical planning question is how much gets catalyzed at the start of a run and what happens to the remainder if the line goes down. That is worth answering before the first line trial rather than during it.

The application window

Anilox roller or doctor blade, then 140 C for one minute. Both application methods are standard on synthetic leather lines, and the choice usually follows what the line already runs rather than what the lacquer prefers.

The drying condition is the constraint worth checking first. One minute at 140 C sets the relationship between oven length and line speed, and the substrate underneath sees that same heat. On a printed or embossed material, confirm the base tolerates the dwell before the finish is specified, because the alternative is discovering it on coated stock.

What it resists, and what it removes

These are two different properties and they are worth separating, because a specification usually cares about one of them more than the other.

Resistance. High scratch resistance, good resistance to solvents and chemicals, and low soiling. This is the durability half: the surface holds up to wear and to whatever cleaning regime the operator runs.

Removability. Dried permanent marker or ballpoint comes off a coated artificial leather surface with a dry cloth, residue free. Spray paint is removed without residue in many cases, which is a qualified claim and stays qualified here.

The qualification is not a hedge, it is the specification. Spray paints vary widely in binder and pigment, so the honest answer is that the finish handles many of them and the way to know about yours is to test the actual products. For transit and public-space work, that means getting hold of what shows up on the vehicles rather than what is convenient to buy.

Where waterborne changes the picture

Anti-graffiti finishes have historically been solventborne, and the waterborne versions are the newer part of the range. Two things follow.

For a plant already running water, a waterborne 2K system removes the reason to keep a solvent line alive for one finish. For a plant running solvent, it is a candidate in a conversion rather than a drop-in: drying, wetting, achievable line speed, blocking, and adhesion all shift with the carrier, so the change is planned as a line trial. Running the solventborne and waterborne versions of the same finish together answers the process question and the performance question in one pass.

Where these finishes go

Anti-graffiti and easy-clean topcoats are specified where the surface is public and the marking is not accidental: transit seating and interior panels, seating in public buildings, and the vinyl and synthetic leather used across hospitality and healthcare surfaces where cleaning is frequent and aggressive.

The same chemistry family covers general easy-clean work on PVC and PU surfaces, where the requirement is soil release and cleanability rather than graffiti. Sheen selection tends to matter more in those applications, since the surface is being specified on appearance as much as on performance.

What to settle before specifying

Five facts get to a short list.

The substrate. PVC or PU synthetic leather, the base color, and whether the surface is printed, grained, or embossed.

The sheen. Matt, more matt, or gloss, judged over your own base color and grain rather than on a card.

The marking media. What the end use actually sees, which is what the cleaning claim gets validated against.

The line. Anilox roller or doctor blade, oven length and temperature, line speed, and whether the plant runs water, solvent, or both.

The regulatory position. What the finished article has to declare, including whether SVHC-free is a requirement of the customer or of the market.

What to send us

Send a piece of the synthetic leather you run, tell us the sheen you are after and what gets drawn on it. We will have the candidate grades applied to it and returned with the catalyst specified, so cleanability and appearance are judged on your own material before a line trial.

P.A.T. Products supplies the ROWA Lack range across the United States, Canada, and Mexico, stocked in North America in working lot sizes. The full range sits on the coated textile lacquers page, and the manufacturer background is on the ROWA Lack partner page. The wider selection logic across acrylic, polyurethane, and PVDF is in choosing a topcoat lacquer for PVC-coated fabric.

Frequently asked

What is the pot life of a waterborne 2K anti-graffiti lacquer?

More than eight hours once the catalyst is mixed in. That figure is what makes the system practical on a production line, because it covers a full shift rather than forcing small batches through a short window. The mixed material still has to be used inside that window, so mixing is planned against the run rather than against the day.

Can the lacquer be run without the catalyst?

It can be coated, and it will not perform. The published scratch, solvent, and chemical resistance figures apply to the crosslinked film, which means the matching crosslinker at the stated addition level. Running the base without it produces a coated roll that looks correct and fails the cleaning test, so the catalyst belongs in the specification and in the purchase order alongside the lacquer.

What does an anti-graffiti finish actually remove?

Dried permanent marker and ballpoint come off a coated artificial leather surface with a dry cloth, residue free. Spray paint is removed without residue in many cases, which is a qualified claim rather than an absolute one. The variable is the marking medium, so the finish is validated against the pens, markers, and paints the end use actually sees, on your own coated substrate, rather than against a generic panel.

How is the lacquer applied and dried?

By anilox roller or doctor blade, then dried at 140 C for one minute. Both are standard coating-line methods for synthetic leather, and the one-minute dwell at 140 C sets the oven length the line speed has to fit. Confirm the substrate tolerates that dwell, since the base material and any print or emboss underneath see the same heat.

Which sheen levels are available?

Three: matt, more matt, and gloss, all transparent and all catalyzed with the same crosslinker. Sheen is judged over the base color and the grain of your own material rather than on a drawdown card, because the same lacquer reads differently over a dark embossed hide pattern than over a flat light color. Send a piece of the substrate and we will have the candidates coated on it.

Specifying an anti-graffiti finish?

Send the substrate, the sheen, and what gets drawn on it. We will recommend a grade and catalyst, coat a panel on your own material, and quote lead time and minimum quantity with the sample.