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How to Spec an EV Body, Trim or Exterior Part: What to Send H-O for a Quote
A fast, accurate quote on a die-cut body or trim part comes down to nine inputs: the job (BSR, bonding, or sealing), the BSR mechanism if it is a noise, the substrates and their surface energy, the bond load or closure force, the gap and its tolerance, the interior-or-exterior exposure, any oil or fluid contact, the geometry or drawing, and your adhesive configuration and volumes. This guide walks each input, explains why it matters, and ends with a spec builder that assembles your answers into a request you can paste straight into the contact form.
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The application problem: an incomplete spec stalls the quote
H-O Products is a precision die-cut converter, and every BSR pad, bonding part and weatherseal is made to order from sheet, roll or tape stock cut to your drawing. The concrete problem a buyer runs into is the stalled quote: a request that says "I need a foam strip for a door" without the job, the gap or the exposure cannot be turned into a grade and a price without a follow-up.
The inputs below are the same ones an applications engineer would ask for, so sending them up front turns a back-and-forth into a single response.
The first input does the most work. As covered in the companion guide on BSR, bonding and weatherseal materials, the part is doing one of three jobs: BSR (kill a squeak, rattle or buzz at a contact line), bonding (hold trim, badge or panel while spreading load and absorbing movement), or sealing (close a moving gap against water and wind). The rest of the spec branches from that answer, because the deciding property is different for each.
Why it is challenging: the deciding number changes with the job, and the joint owns the result
A BSR part is specified around the mechanism and the closure force, not a load rating. A bonding part is specified around peel and shear on the actual substrate, measured per ASTM D3330, and those values belong to the tested joint. A weatherseal is specified around compression-deflection and recovery per ASTM D1056, plus the weathering exposure. And the ratings buyers often ask for, an acoustic transmission-loss number under SAE J1400 or a peel value, are properties of the tested assembly rather than of a raw material.
The checklist below is organized around those realities.
What to send, input by input
1. The job, and the mechanism if it is a noise
- If it is BSR: name the mechanism. Squeak (stick-slip at a contact) points at SAE pressed felt; rattle (gap knock) points at a soft cushion such as PORON® microcellular polyurethane; buzz (panel resonance) points at a damping layer such as vinyl nitrile foam.
- If it is bonding: say what is being mounted (trim, badge, cladding, bracket) and whether the joint must also seal. The family is the acrylic foam tape family.
- If it is sealing: name the aperture (door, glazing, liftgate) and whether the seal is compressed once or cycles with use. The lead is EPDM foam.
2. Substrates and surface energy
For bonds, the surface energy of both sides decides the adhesive system before any load number: metals, glass and painted panels accept a standard acrylic system, while low-surface-energy plastics need an adhesive designed for them, often with a primer. Name the materials on both sides of the joint, including paint or coating.
3. Load or closure force
For a bond, send the static and dynamic shear the part sees, plus any peel loading. For a BSR cushion, send the closure force available, which is usually very low; the cushion must work without pushing the trim apart. For a seal, send the compression force the closure can apply.
4. Gap and tolerance
Send the gap the part fills and its tolerance range. The gap and the firmness together decide whether a single grade and thickness meets the target or whether a stack or a different family is needed; an over-thick anti-rattle pad creates its own problem by pre-loading the joint.
5. Interior or exterior, and the weathering exposure
State where the joint lives: protected interior, exposed exterior with sun and ozone, or under-body with spray. Exterior exposure moves seals to EPDM and rules out non-weathering foams; protected interiors open lower-duty options.
6. Oil and fluid contact
Name any oil, fuel or routine fluid contact. Fluid exposure moves cushions and seals to closed-cell, oil-resistant vinyl nitrile and influences the tape system choice.
7. Geometry, footprint, or drawing
A dimensioned drawing (DXF, STEP or PDF) is the cleanest input: footprint, thickness, holes and slots, tolerances and adhesive callouts in one artifact. A marked-up sketch with dimensions is enough to start a prototype.
8. Adhesive, liner and placement aids
Tell us whether the part needs a pressure-sensitive adhesive on one or both faces, a liner, a pull-tab, or kiss-cut presentation on a roll. BSR parts in particular live or die on placement, so the liner and tab detail is part of the function.
9. Prototype and annual volume
Share both the prototype quantity and the expected annual volume. All parts are custom manufactured to order, and minimum production run quantities apply, so the volume shapes the converting approach and the tooling decision. Prototype quantities through full production are welcome.
The spec at a glance
| Input | BSR | Bonding | Weatherseal |
|---|---|---|---|
| Performance target | Mechanism (squeak / rattle / buzz) + closure force | Static and dynamic shear + peel on the substrate | Compression-deflection + recovery per ASTM D1056 |
| Substrates | Contact materials | Both sides incl. paint; surface energy | Mating surfaces |
| Environment | Interior / exterior / under-body; sun, ozone, spray; oil or fluids named | ||
| Build | Adhesive, liner, pull-tab, kiss-cut presentation; thickness or range | ||
| Geometry | Footprint or dimensioned drawing (DXF / STEP / PDF); gap and tolerance | ||
| Commercial | Prototype quantity + annual volume | ||
Body / Trim / Exterior RFQ Spec Builder
Job: BSR (squeak / rattle / buzz) Mechanism / joint: [to be provided] Substrates: [to be provided] Load / closure force: [to be provided] Gap / tolerance: [to be provided] Exposure: [to be provided] Oil / fluids: [to be provided] Build: standard die-cut; thickness [to be provided] Geometry: [to be provided] Substrate notes: none stated Commercial: prototype quantity [to be provided]; annual volume [to be provided] Drawing: to follow
Illustrative only; confirm against current material data and a drawing review. This builder formats your inputs into a request; it does not select a grade, size a bond area, or assert a peel or acoustic value. Force-deflection, compression set, peel and weathering values are confirmed on the manufacturer's current technical data sheet and in an H-O drawing review, and tested ratings belong to your tested joint or assembly.
Common failure modes in the spec itself
| Spec gap | Why it stalls the quote | The fix |
|---|---|---|
| "A foam strip," no job named | BSR, bonding and sealing point at different families and tests | Name the job; the family follows |
| "A noise pad," no mechanism | Squeak, rattle and buzz have three different fixes | Name squeak, rattle or buzz; felt, cushion or damping follows |
| Tape request, one substrate named | Surface energy of both sides decides the adhesive system | Name both substrates incl. paint or coating |
| "Weatherproof foam" | Not a grade property; exposure and compression window are undefined | State the exposure and the compression-deflection target per ASTM D1056 |
| Asking for a rated acoustic number on the material | Transmission loss under SAE J1400 belongs to the tested assembly | Send the panel build; validate the rating on the assembly |
| No volumes | The converting and tooling approach depends on prototype versus production scale | Send both prototype quantity and annual volume |
How H-O Products helps
H-O Products is a precision die-cut converter working across EV and battery programs. Once your spec is complete, we recommend a family and grade direction across PORON® microcellular polyurethane, HyPUR-cel® polyurethane foam, SAE pressed felt, acrylic foam bonding tape, EPDM foam and vinyl nitrile foam, then convert the stock to your drawing: die-cut, kiss-cut, laser or waterjet cut, laminated, slit to width and kitted.
Documentation available on request includes the material technical data sheet, a certificate of conformance, lot traceability, and first-article inspection, all under our ISO 9001:2015 certified quality management system. We do not produce the raw stock and we do not certify the finished assembly; peel and acoustic ratings belong to your tested joint.
Send the spec, get a quote
Use the builder above to assemble your request, then send it through the contact page with your drawing attached. We will recommend a grade direction and convert samples on your footprint.
Samples typically ship in 3 to 5 business days for common die-cut configurations; standard production runs about two weeks; special orders are quoted to the job.
Family-owned in Winsted, Connecticut since 1971 · ISO 9001:2015 certified · OEMs worldwide send us a drawing — and get back their part.
Related reading
ApplicationEV Body, Trim & Exterior NVH, Bonding and WeathersealingRead →
GuideBSR Pads, Bonding Tapes and Weatherseals: Picking Materials for EV Body and TrimRead →
GuideSun, Ozone and a Decade Outdoors: Weathering Failure Modes in EV Exterior Trim and SealsRead →
IndustryEV & Battery materials overviewRead →
Frequently asked questions
What should I send to get a quote on a body, trim or exterior part?
Nine inputs: the job (BSR, bonding, or sealing), the BSR mechanism if it is a noise, the substrates on both sides including paint or coating, the load or closure force, the gap and tolerance, the interior-or-exterior exposure, any oil or fluid contact, the geometry or a drawing, and the adhesive configuration plus prototype and annual volumes. With those, a converter can recommend a family and grade direction in one pass.
How do I choose a bonding tape for exterior trim or a badge?
Start with the substrate, then the load and the environment. The surface energy of what you are bonding to decides the adhesive system: metals, glass and painted panels accept a standard acrylic foam tape, while low-surface-energy plastics need a tape adhesive designed for them, often with a primer. Then size the tape for static and dynamic shear and for thermal movement between dissimilar materials, and confirm it survives the exterior weathering. Peel is measured per ASTM D3330 on the actual substrate.
Does H-O make the raw foam and tape, and is there a minimum order?
H-O is a precision die-cut converter, not a raw-material producer. We buy sheet, roll and tape stock from the material manufacturers and convert it to your drawing by die-cutting, kiss-cutting, laser and waterjet cutting, lamination, slitting and kitting. Every part is made to order; minimum quantities vary by material and part, and prototype quantities through full production runs are equally welcome.
Request a quote for your EV body, trim & exterior part
Send H-O your drawing or describe the part—engineering reviews every RFQ and converts samples on your geometry.
Last updated · Reviewed by H-O Products engineering (ISO 9001:2015 certified converter, Winsted, CT).
References
- ASTM D1056, Standard Specification for Flexible Cellular Materials: Sponge or Expanded Rubber. ASTM International.
- ASTM D3330, Standard Test Method for Peel Adhesion of Pressure-Sensitive Tape. ASTM International.
- ASTM D3574, Standard Test Methods for Flexible Cellular Materials: Slab, Bonded, and Molded Urethane Foams. ASTM International.
- SAE J1400, Laboratory Measurement of the Airborne Sound Barrier Performance of Automotive Materials and Assemblies. SAE International.
This article cites general engineering principles and published standards (ASTM D1056 for sponge and expanded rubber, ASTM D3574 for flexible cellular urethane, ASTM D3330 for peel adhesion, ASTM D395 for compression set, and SAE J1400 for airborne sound-barrier performance of assemblies). Material names refer to material families H-O Products converts.
Force-deflection, compression set, peel and weathering values are grade- and substrate-specific; confirm all values against the manufacturer's current technical data sheet and an engineering drawing review.
All parts are custom manufactured to order and minimum production run quantities apply. H-O is a die-cut converter, not a raw-material producer, and does not certify the finished assembly.