Rack Gap Seals: Brush, Magnetic & Foam Strips
Seals for the gaps between cabinets, under cabinets and around containment: brush strips, thin magnetic strip rolls, expanding foam tape and under-rack skirts — cut to length for mixed-brand rows.
- Minimum order
- From trial cartons; row kits per quotation.
- Lead time
- Confirmed per quotation.
Once blanking panels and floor grommets are in place, the remaining leaks are the gaps: between neighbouring cabinets of different brands, under cabinets on uneven floors, and around containment panels. Gap seals close these paths so contained air stays contained.
Four product types cover most situations: brush strips (bristles conform to irregular gaps and allow cable pass-through), magnetic strip rolls (very thin, scored for tearing to length, attach to steel cabinet frames), expanding foam tape (fills gaps above or below containment panels and along rack rails), and flexible under-rack skirts that attach magnetically or with hook-and-loop to seal cabinet bottoms.
We supply all four as standard lengths or rolls, cut-to-length kits per row, and combined sealing packages with grommets and blanking panels. Sealing products are specified by gap width and mounting surface — not by claimed energy savings.
Key specifications
| Types | Brush strips · magnetic strip rolls · expanding foam tape · flexible under-rack skirtsSource: sealeze.com |
|---|---|
| Magnetic strip example | Ultra-thin scored strip rolls (≈ 0.72 mm published for one range)Source: cool-shield.com |
| Gap range example (flexible seals) | ≈ 1 in to 6 in (25–150 mm) gapsSource: airseal.net |
| Foam tape uses | Above/below containment panels, next to rack rails, under cabinets, floor gapsSource: datacenterresources.com |
| Under-rack skirts | Magnetic or hook-and-loop attachment to cabinet baseSource: datacenterresources.com |
Typical, configurable ranges compiled from published manufacturer data. Final values are confirmed per order in the quotation and supporting test documents.
Materials
Aluminium or steel-backed brush strips with synthetic bristles; flexible magnetic sheet; closed-cell foam tapes; coated fabric or PVC skirts.
Dimensions & formats
Supplied in standard lengths/rolls or cut to measured gap lengths.
Options & customisation
- Cut-to-length kits per row
- Colour (black standard)
- Distributor packaging
Applications
- Gaps between mixed-brand cabinets
- Under-cabinet gaps on uneven floors
- Containment panel edges
- Rack rail gaps beside equipment
- Retrofits during airflow audits
Ordering information
Minimum order
From trial cartons; row kits per quotation.
Lead time
Confirmed per quotation.
Packaging
Rolls and strips in cartons; kits labelled per row.
Loading & shipping
Light and compact.
Material flammability data supplied where available; no energy-saving figures claimed for individual seals.
Technical documentation
- Material data (bristle, magnet, foam, fabric)Available on request with your RFQ
- Installation guideAvailable on request with your RFQ
Frequently asked questions
Which seal for which gap?
Brush strips where cables pass or gaps are irregular; magnetic strips on steel frames for thin, straight gaps; foam for fixed gaps along rails and panels; skirts for the space under cabinets.
Will magnetic strips stick to our racks?
Only to ferromagnetic steel surfaces — not to aluminium or painted plastic trims.
Can you supply by row?
Yes — send row lengths and gap widths and we pack kits per row.
Research references
Related products
Request a Quotation: Rack Gap Seals: Brush, Magnetic & Foam Strips
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