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The WOOSTER BRUSH RR381-4 1/2 is a double pin stripe roller cover designed for precise stripe and detail work on surfaces ranging from flat to high-gloss finishes. Part of the Jumbo-Koter Pro and Doo-Z FTP Closed End line, this 2-pack cover features a 3/8-inch nap depth and a no-shed fabric construction with Hydro Flow Technology. That fabric engineering controls paint release throughout the roll, reducing drips and delivering consistent coverage pass after pass. The closed-end design allows the fabric to wrap the ends of the roller, making it possible to cut into corners without a separate brush. Compatible with enamels, primers, urethanes, and epoxies.
This roller cover is built for trim painting, pin striping, and tight-access surface work where a full-size roller is impractical. The compact Jumbo-Koter frame size makes it well suited for door frames, window casings, cabinet faces, baseboards, and similar detail applications. It handles solvent-based and water-based coatings, covering the full sheen range from flat to gloss. The 2-pack format supports back-to-back use on larger jobs or coating systems that require a dedicated cover per coat.
Designed for use with Jumbo-Koter roller frames as an OEM-style replacement or standard replenishment cover for compact detail roller systems.
Painting contractors and finish carpenters typically install Jumbo-Koter covers onto compatible mini-roller frames. Before loading the cover, inspect the frame cage for damage or dried coating buildup that could affect fit or rotation. Condition the cover with the intended coating before beginning the application pass to prime the fabric and improve initial paint pickup. Follow coating manufacturer guidelines for surface prep, dry times, and recoat intervals.
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