SBE42VN
SBE42VN is a soft/medium firmness, closed-cell vinyl nitrile foam composed of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), with a compression deflection of 5–9 psi at 25% per ASTM D1056 and a density of 5–9 lb/ft³, available in ten thicknesses from 1/16″ to 1″. The material has a service temperature range of -20°F to 160°F, passes FMVSS-302, is Listed under UL 94 HF-1, and is classified ASTM D1056-07 2B2.
Key Properties
- Compression Deflection @ 25%: 5–9 psi (ASTM D1056)
- Tensile Strength: 80 psi (ASTM D412)
- Elongation: 120% (ASTM D412)
- Compression Set (Max): 25% (ASTM D1056)
- Density: 5–9 lb/ft³ (ASTM D1056)
- Service Temperature: -20°F to 160°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 1/16″, 1/8″, 3/16″, 1/4″, 5/16″, 3/8″, 1/2″, 5/8″, 3/4″, 1″ | — |
| Color | Black | — |
| Polymer | Nitrile Butadiene Rubber (NBR) / Polyvinyl Chloride (PVC) | — |
| Density | 5–9 lb/ft³ | ASTM D1056 |
| Thermal Conductivity | .27 btu/(h·ft²·°F) | — |
Mechanical Properties
| Property | Value | Test Method |
| Compression Deflection @ 25% | 5–9 psi | ASTM D1056 |
| Compression Set (Max) | 25% | ASTM D1056 |
| Compression Deflection Change After Oven Aging | ±30% | ASTM D1056 |
| Water Absorption (Max) | 10% | ASTM D1056 |
| Tensile Strength | 80 psi | ASTM D412 |
| Elongation | 120% | ASTM D412 |
| Tear Strength | 18 lb/in | ASTM D624 |
| Resilience | 10% | ASTM D2632 |
Thermal Properties
| Property | Value | Test Method |
| Service Temperature | -20°F to 160°F | — |
| High Intermittent Temperature | 220°F | — |
Flame & Fire Performance
| Property | Value | Test Method |
| Flame Retardant | Yes | — |
| FMVSS-302 | Pass | — |
| UL 94 HF-1 | Listed¹ | — |
Environmental Performance
| Property | Value | Test Method |
| Weather Resistance | Good | — |
Regulatory / Compliance Data
| Property | Value | Test Method |
| ASTM D1056-07 | 2B2 | — |
| ASTM D1056-67 | SBE42 | — |
| ASTM D1056 Suffix’s | A1, B2, C1, M | — |
Compliance
- FMVSS-302 — Compliant (Pass)
- UL 94 HF-1 — Listed¹
- Tonneau cover sealing tape requiring slightly greater deflection resistance than the soft SBE41VN grade for more positive sealing pressure under variable closure loads
- Truck tool box sealing tape where UL 94 HF-1 Listed flame compliance is required in addition to FMVSS-302
- Curtain wall mullion end dam components in architectural glazing assemblies requiring a soft/medium vinyl nitrile foam with UL fire rating
- Acoustic panel tape applications requiring a soft/medium NBR/PVC foam with documented thermal conductivity and UL 94 HF-1 Listed status
- General flame-retardant sealing and gasketing requiring ASTM D1056-07 2B2 classification, FMVSS-302 compliance, and UL 94 HF-1 listing
Common industries: Automotive, construction, architectural glazing, acoustics, general manufacturing, electrical.
SBE42VN is a soft/medium firmness closed-cell vinyl nitrile foam classified ASTM D1056-07 2B2, constructed from a blend of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC).
Available in ten thicknesses from 1/16″ to 1″, it is designed for tonneau cover sealing tape, truck tool box sealing tape, curtain wall mullion end dams, and acoustic panel tape applications requiring a medium/soft, conformable flame-retardant foam with good weather resistance. SBE42VN is the only grade in the SBE series that carries a UL 94 HF-1 Listed designation, making it the selection when UL flame compliance is required in addition to FMVSS-302.
Compression set (max) is 25% per ASTM D1056 — the same as SBE41VN. Tensile strength is 80 psi and elongation is 120% per ASTM D412. Tear strength is 18 lb/in per ASTM D624. Resilience is 10% per ASTM D2632 — lower than SBE41VN’s 15%. Thermal conductivity is .27 btu/(h·ft²·°F) — listed on this TDS but not on SBE41VN. Compression deflection change after oven aging is ±30%. Water absorption (max) is 10%. High intermittent temperature is 220°F.
Weather resistance is rated Good. ASTM D1056-67 designation is SBE42. ASTM D1056 Suffix’s: A1, B2, C1, M.
Compliant with FMVSS-302 (Pass) and UL 94 HF-1 (Listed¹).
What differentiates SBE42VN from SBE41VN in the SBE vinyl nitrile foam series?
SBE42VN is the soft/medium grade at 5–9 psi compression deflection at 25% and 5–9 lb/ft³ density — firmer and denser than SBE41VN (2–5 psi, 4–8 lb/ft³). SBE42VN is the only grade in the SBE series with UL 94 HF-1 Listed status and a thermal conductivity value (.27 btu/(h·ft²·°F)). Resilience is lower at 10% versus SBE41VN's 15%, and elongation is lower at 120% versus 150%. SBE42VN's suffix set adds A1 to the B2, C1, M shared with SBE41VN. Both grades share the same compression set (max) of 25%, tensile strength (80 psi), service temperature (-20°F to 160°F), and high intermittent temperature (220°F).
Why is compression set critical for a soft/medium closed-cell vinyl nitrile foam used in tonneau cover and curtain wall sealing?
In tonneau cover, tool box, and curtain wall mullion dam applications, the foam is installed under sustained compression and may be subjected to thermal cycling and repeated loading. A soft/medium foam with high compression set gradually loses its sealing contact force as it permanently flattens under load — allowing moisture, dust, air, or light to bypass the seal. SBE42VN's compression set (max) of 25% per ASTM D1056 confirms the foam retains sufficient geometry to maintain sealing contact force through its rated service conditions, supporting long-term performance in both static and cyclic sealing applications.
What is the service temperature range for SBE42VN?
The service temperature range is -20°F to 160°F as listed on the TDS. High intermittent temperature is 220°F.
Is SBE42VN suitable for regulated automotive and UL-listed environments?
Yes. SBE42VN passes FMVSS-302 and is Listed under UL 94 HF-1 as listed on the TDS.
How should SBE42VN be specified?
Specify grade (SBE42VN), ASTM D1056 designation (2B2), applicable suffix designations (A1, B2, C1, M), thickness (from the ten available gauges), color (Black), applicable compliance requirements (FMVSS-302, UL 94 HF-1), dimensional tolerances, and finished format (sheet, slit roll, or die-cut component).
