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WB INTERIOR TOPCOAT 20 WHITE is a 2K waterborne white waterborne topcoat designed as an acrylic-polyurethane system, so it delivers a professional interior finish using a familiar catalyzed workflow. The acrylic-polyurethane waterborne topcoat can be applied over waterborne clear or pigmented basecoats in coating systems, letting shops stay inside a single waterborne system from base to finish for consistent film build. This waterborne topcoat is part of ML Campbell clear topcoats, so it fits naturally into shop finishing programs that already rely on this brand. The 20 gloss level targets a low-sheen result, which helps finished work read as smooth and uniform under typical interior lighting. Because it is a 2K product, it uses a catalyst-driven cure, giving finishers predictable performance inside a defined pot-life window.
The 2K waterborne white waterborne topcoat format supports a catalyzed mixing step, so finishers can stage only what they need for a given run. High performance with shorter pot-life at 3 hours suits quick-moving lines, where material is sprayed and used promptly. The extended pot life option at 8 hours suits shops that spread work across the day, so the same mix can cover multiple setups. Because the product can be applied over waterborne clear or pigmented basecoats, a finisher can keep primer and finish in the same technology family, which streamlines setups and expectations for sanding and recoat timing on interior jobs.
This acrylic-polyurethane waterborne topcoat is intended for interior coating systems that already use waterborne clear or pigmented basecoats, so it drops in as the finishing layer without changing basecoat products. In a clear system, the waterborne clear basecoat builds the foundation while this topcoat locks in the surface properties and gloss at 20. In a pigmented system, the waterborne pigmented basecoat establishes color while the 2K waterborne white waterborne topcoat provides the final sheen and surface hardness. Because it is part of ML Campbell clear topcoats, finishers who specify that brand can align their basecoats and this topcoat inside a single supplier family, which helps standardize performance expectations across multiple jobs.
The two catalyst options described for this topcoat shape how work flows through the shop, with a high performance, shorter pot-life option at 3 hours and an extended pot life option at 8 hours. Choosing between those options allows a finisher to balance throughput against how long mixed material needs to stay usable during staging, masking, and spraying. The 20 gloss level sits in a lower-sheen range, which helps hide minor surface irregularities that can remain after sanding, especially on large flat interior panels. Tinting up to 4% by volume with XA2006/XX Waterborne Pastes lets a shop fine-tune tone inside the system, such as slightly adjusting a white or off-white target while remaining inside the specified tint limit. The note that AT48 is not a convertor base clarifies that this topcoat is meant for limited tinting rather than broad-base color mixing, so the product stays in its intended role as a topcoat within the system.
WB INTERIOR TOPCOAT 20 WHITE is a 2K acrylic-polyurethane waterborne topcoat, so it uses a catalyst-driven system that delivers a catalyzed interior film in a waterborne format.
This topcoat is applied over waterborne clear or pigmented basecoats in coating systems, so it functions as the final finish layer on interior projects using those basecoats.
The 20 gloss level provides a low-sheen surface, which helps finished interior work look smooth and controlled under normal lighting while softening specular reflections.
The two catalyst options allow a choice between high performance with 3-hour pot-life and extended 8-hour pot life, aligning material working time with shop scheduling.
This waterborne topcoat can be tinted up to 4% by volume with XA2006/XX Waterborne Pastes, allowing controlled color adjustment while remaining within the specified tint limit.
AT48 is not a convertor base, so it is intended to be used as a topcoat with limited tinting rather than as a universal base for broad color mixing.
WB INTERIOR TOPCOAT 20 WHITE as a 2K acrylic-polyurethane waterborne topcoat gives finishers a defined role in interior coating systems: it caps waterborne clear or pigmented basecoats with a 20 gloss, catalyst-driven film. The options for a 3-hour high performance pot-life or 8-hour extended pot life let shops match material behavior to their production style. With excellent surface hardness, good vertical hang, leveling, and limited tinting up to 4% with XA2006/XX Waterborne Pastes, this ML Campbell clear topcoat fits interior projects that rely on controlled sheen and consistent film build within a waterborne system.
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