Strip Brush

A strip brush is a long, narrow brush made from a continuous channel that holds parallel rows of filament along its full length. The brush is mounted along a door edge, enclosure frame, conveyor side, rail, or opening; the free filament tips contact the adjacent surface or the material moving past.

In sealing service, the mounted gap is smaller than the filament projection, so the fill bends under a controlled preload. The compressed filaments fill the remaining space and restrict airborne dust, chips, mist, light, noise, and insects. In wiping or guiding service, the brush contacts a moving surface lightly and removes loose debris, oil film, or product residue, or keeps the material aligned over the length of contact.

A strip brush is a passive linear contact tool, not a powered brush or an absolute seal. It reduces, redirects, and controls passage through a gap; it does not create a watertight or gas-tight closure. That distinction matters when the brush is compared with a gasket, rubber seal, or solid barrier.

Values below represent the standard range. Exact dimensions, fill density, and holder profile are matched to each installation.

Compression is calculated from the free trim height, not the overall brush height. A brush with 50 mm trim tightened to 45 mm is at 10% compression.

• Door and panel gap sealing — access doors, sliding guards, machine enclosures, electrical cabinets, and inspection panels; closes gaps while the door remains operable.
• Conveyor, oven, and spray booth openings — pass-through slots where product or trays travel; filaments open locally and reseal, reducing heat loss, draft, spray mist, and dust transfer.
• Cable and wire routing openings — floor slots, control cabinets, server racks, and machine bases; cables pass continuously and the surrounding opening stays blocked.
• Edge wiping and material guiding — conveyor side rails, belt edges, printing and laminating lines, and transfer stations where light contact removes loose residue or aligns product.
• Exterior door and threshold edges — garage, loading dock, and exterior access door edges where insect, dust, light, and draft reduction are needed.

Start with the gap, not the brush

Measure the smallest and largest installed gap along the full length, plus the retaining slot dimensions or mounting surface. The trim height must exceed the largest gap at the planned compression setting. A gap that varies along the edge needs a longer trim and a lower preload, or a continuous flexible holder that follows the profile.

Set the compression for the intended job

Dust wiping and light product contact run better at 5–15% trim compression. Sealing and air or dust restriction need 10–25% compression. If the filament folds over flat and does not recover after the product passes, the preload is too high or the filament is too soft for the contact.

Choose the filament for the operating environment

Adjust filament diameter and fill density after the material choice. Fine filaments with high density block fine dust and light; thicker filaments tolerate rougher edges and heavier mechanical contact.

Match the channel to the mounting system

Existing equipment may already have a standard retaining slot; in that case channel width and profile must match. New installations can use a straight channel, an aluminum carrier with bolt holes, or an angled holder to position the contact face correctly. Confirm the holder allows the brush to be slid out and replaced from one end or an accessible point.

Know when a strip brush is not the right closure

If the opening must be watertight or gas-tight, use a rubber gasket, foam, compression seal, or solid barrier instead. If the brush will be dragged across highly abrasive edges at heavy pressure, evaluate the wear rate and consider a heavier stainless steel wire fill or a separate metal wear strip. If the environment requires absolute contamination control and zero particle passage, a brush alone may need to be paired with another barrier.

Industrial strip brushes are usually built to the opening rather than selected from fixed stock. For a project request, provide the gap dimensions, panel edge profile, mounting slot or hole pattern, ambient and process temperatures, chemicals or washdown fluids, required compression, and anything that passes through the opening. A drawing or photo helps us match the profile quickly.

• Length — cut sections from about 100 mm to 3,000 mm; longer openings can use aligned sections or continuous custom lengths.
• Trim height and profile — any projection within or beyond the standard 12.7–152.4 mm range, straight or angled trim, and multi-height fill for irregular edges.
• Fill — nylon PA, PBT, horsehair, 316 stainless steel wire; filament diameter from fine to coarse; fill density and stiffness adjusted.
• Channel or holder — straight steel channel, stainless channel, aluminum carrier, angle holder, custom extrusion, drilled or slotted mounting.
• End details — cut ends, formed corners, closed ends, connectors, or overlapped joints.
• Color, marking, packaging — filament and channel color, printed or laser identification, bulk coil, cut-to-length, bagged per length, or project-specific packing.

If the project requires material declarations, inspection, or third-party testing, we can assist with the specific documentation during customization.