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Films, Felt, Foam, or Cork: Selecting Aerospace GSE and MRO Consumables
Ground-support and manufacturing consumables are easy to treat as commodities and expensive to get wrong: a protective film that leaves residue ruins a finish, a release material that bonds to a layup scraps a part, and dunnage that sheds creates foreign object debris. These materials serve three jobs, protecting surfaces, releasing parts on process benches, and cushioning parts for handling.
This guide walks the families on the GSE and MRO consumables page, from protective films and PTFE release surfaces to felt, dunnage foams, and cork, matched to the job each does best.
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Protect, release, or cushion: which consumable job is it?
Ground-support and manufacturing consumables are easy to treat as commodities and expensive to get wrong. A protective film that leaves residue ruins a finish; a release material that bonds to a layup scraps a part; dunnage that sheds creates foreign object debris. The families here serve three jobs: protecting finished surfaces during build and transit, providing release and process surfaces on layup and bonding benches, and cushioning and locating parts for handling and shipping.
H-O Products converts these consumables to your pattern; none are flight hardware. The families below are sorted by the job they do.
Surface protection: films that guard a finish and release clean
Protecting a painted or polished surface through assembly and transit is the job of the protective films. Polymask PE films and the broader protective films family guard skins and panels, glass protective film covers windows and transparencies, and the fabrication protection stock covers benches and work surfaces, all chosen so the adhesive holds during the work and releases without residue, with peel behavior characterized per ASTM D3330 on the TDS.
Release and process surfaces: composite layup and bonding
On layup and bonding benches, the surface must release the part, not bond to it. PTFE-coated fiberglass and PTFE film and coated fiberglass give a slick, high-temperature release face for caul plates and bench tops, virgin skived PTFE film provides the lowest-friction release surface, and the transfer-class process tapes hold materials through process steps.
Tooling and polishing: felt
SAE pressed felt in the appropriate SAE grades serves tooling, wiping, and polishing duty, carrying lubricant or polish and cushioning a tool against a finished surface, selected by density for the task.
Dunnage and cushioning: FOD-disciplined foams
Cushioning and locating parts for handling and shipping calls for clean, non-shedding foams. EPE expanded polyethylene and clipfoam by density are economical dunnage that hold their shape, crosslinked polyethylene foam gives a finer, cleaner cell for cut kit trays, Ensolite and rebonded neoprene add resilient cushioning, with PE-foam data per ASTM D3575.
Leveling and vibration: cork and bearing-grade
Under ground-support equipment and crates, rubberized cork and cork wonder pads level and damp vibration, cork supplies gasketing and shimming, and Atlas bearing-grade provides low-friction slide and wear faces on fixtures.
GSE and MRO Families by the Job They Do Best
| Family | Best job | Why it is chosen | Data on TDS |
|---|---|---|---|
| Protective films | Surface protection | Guards a finish; releases without residue | ASTM D3330 peel; residue per TDS |
| PTFE-coated glass / skived PTFE | Release surface | Slick, high-temperature; releases the layup | Friction and temperature per TDS |
| SAE felt | Tooling / polishing | Carries polish; cushions a tool | SAE grades by density |
| EPE / crosslinked PE | Dunnage / kit trays | Clean, non-shedding; holds shape | ASTM D3575 PE foam |
| Rubberized cork | Leveling / vibration | Levels and damps under GSE and crates | Compression and load per TDS |
Illustrative and relative only; confirm each grade on its current technical data sheet. These are process and handling consumables, not flight hardware.
How do residue, FOD, and reuse reshape the shortlist?
Three practical concerns dominate consumable selection. First, residue: a protective film or process tape must release without leaving adhesive on a painted or polished surface, so low-tack, clean-release grades are chosen and peel is checked per ASTM D3330. Second, foreign object debris: dunnage and kit foams must not shed particles or crumble into a clean assembly, so closed-cell and non-shedding grades are preferred and friable foams avoided.
Third, reuse: a kit tray cut for repeated use is specified in a more durable, cleaner foam than one-trip dunnage. Name whether the consumable touches a finished surface, enters a clean area, or must survive many cycles, and the grade follows.
How H-O Products helps
H-O Products die-cuts, waterjet-cuts, slits, and kits the consumable families above to your pattern in Winsted, Connecticut; we do not manufacture the films, foams, or felt in-house. We cut protective films and release surfaces to size, route foam kit trays and dunnage to nest specific parts, slit felt and process tapes, and kit consumable sets to work orders, all under our ISO 9001:2015 certified quality management system with lot-coded traceability and the maker's TDS on the order.
Frequently asked questions
What protective film keeps finished aircraft surfaces unmarked during build?
A low-tack protective film such as a Polymask PE film for skins and panels, or a glass protective film for windows and transparencies, chosen so the adhesive holds through the work and releases without residue, with peel characterized per ASTM D3330. The right tack level depends on the surface and how long the film stays on; tell us the surface and the dwell and we will steer toward a clean-release grade.
What release materials run on composite layup and bonding benches?
PTFE-coated fiberglass and skived PTFE film are the usual release surfaces: slick, high-temperature faces for caul plates, bench tops, and tooling that let the part release rather than bond. Transfer-class process tapes hold materials through steps where needed. We cut these to your bench or tool size; the process itself is governed by your own procedures.
What is FOD-disciplined dunnage, and which foams qualify?
FOD-disciplined dunnage cushions and locates parts without shedding particles or crumbling into a clean assembly, since foreign object debris is a real hazard in aerospace work. Closed-cell, non-shedding foams such as expanded polyethylene, clipfoam, and crosslinked polyethylene qualify; friable or open, dusty foams are avoided in clean areas. We route kit trays in these grades to nest specific parts cleanly.
Felt vs UHMW vs cork: which pad goes where?
Felt carries polish and cushions tools for tooling and finishing duty; UHMW and bearing-grade materials give low-friction slide and wear faces on fixtures; cork and rubberized cork level and damp vibration under ground-support equipment and crates. The job, friction, polishing, or leveling, picks the family. Tell us the duty and we will steer toward the right grade and density.
Are these GSE and MRO materials flight-certified?
No. These are process, protection, and handling consumables for production, maintenance, and ground operations; they are not flight hardware and are not presented as flight-certified. H-O converts them to your pattern and supplies the maker's published data; how they are used in your process is governed by your own procedures and approvals.
Get a GSE or MRO consumable recommendation
Tell us the job (surface protection, process release, tooling, dunnage, or leveling), the surface or parts involved, and any residue or FOD concern, and we will recommend a family and quote converted consumables to your pattern.
Samples typically ship in 3 to 5 business days for common die-cut configurations on materials we keep on hand; standard production runs about two weeks after drawing approval; expedited service is available. MOQ varies by material and part.
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Related reading
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Last updated · Reviewed by H-O Products engineering (ISO 9001:2015 certified converter, Winsted, CT).
References
- ASTM D3330 (peel adhesion of pressure-sensitive tape and film); ASTM D1894 (coefficient of friction); ASTM D3575 (flexible cellular polyethylene); ASTM D1056 (flexible cellular rubber). Cited by designation.
- These are process and handling consumables; H-O makes no flight-certification claim.
- Manufacturer technical data sheets: Polymask and protective PE films, glass protective film, fabrication protection stock, PTFE-coated fiberglass and skived PTFE film, transfer-class process tapes, SAE pressed felt, EPE and clipfoam, crosslinked polyethylene foam, Ensolite and rebonded neoprene, rubberized cork and cork wonder pads, Atlas bearing-grade.
This article summarizes ground-support-equipment, MRO, and manufacturing-consumable selection principles using the families and method designations cited on the parent application page. These are process, protection, and handling consumables for production, maintenance, and ground use; they are not flight hardware and are not presented as flight-certified.
Comparisons are qualitative; values are per each grade's current technical data sheet, and no test results are quoted. All parts are custom converted to order; minimum run quantities vary by material and part. H-O is a converter, not a raw-material producer.