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The PRO-SOURCE MB703636 is a back strip brush designed for cleaning, sealing, and finishing applications where a flexible, long-reach bristle tool is required. The brush features a stainless steel back strip that holds nylon bristles measuring 6 inches in length, providing a wide sweeping surface. At 36 inches overall length (OAL) and a back strip width of 5/16 inches, this brush fits into channels, door frames, conveyor guides, and similar linear applications. It is commonly installed or used by maintenance technicians, HVAC installers, and contractors who need to sweep, seal, or protect edges and openings against air, dust, or debris infiltration.
This back strip brush suits both residential and commercial settings. It is well-suited for door and window perimeter sealing, conveyor side guides, industrial equipment brush seals, and duct or panel edge finishing. The 36-inch OAL allows it to span standard door heights or extended channel runs without splicing. The nylon bristle material offers flexibility and resistance to moisture, making it appropriate for both interior and exterior installations in moderate-exposure environments.
Designed as an OEM-style replacement or direct-install back strip brush for standard 5/16-inch brush-seal channel applications in doors, windows, conveyors, and industrial equipment frames.
Back strip brushes are typically installed by maintenance technicians or contractors using basic hand tools. Before installation, ensure the mounting channel is clean and free of debris to allow the back strip to seat fully. The stainless steel back strip can be cut to length with metal shears if a shorter run is needed. Follow applicable building or mechanical codes for sealing requirements in the specific application.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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