SBE41VN
SBE41VN is a soft, conformable closed-cell vinyl nitrile foam composed of Nitrile Butadiene Rubber (NBR) and Polyvinyl Chloride (PVC), with a compression deflection of 2–5 psi at 25% per ASTM D1056 and a density of 4–8 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 for flame compliance, and is classified ASTM D1056-07 2B1.
Key Properties
- Compression Deflection @ 25%: 2–5 psi (ASTM D1056)
- Tensile Strength: 80 psi (ASTM D412)
- Elongation: 150% (ASTM D412)
- Compression Set (Max): 25% (ASTM D1056)
- Density: 4–8 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 | 4–8 lb/ft³ | ASTM D1056 |
Mechanical Properties
| Property | Value | Test Method |
| Compression Deflection @ 25% | 2–5 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 | 150% | ASTM D412 |
| Tear Strength | 17 lb/in | ASTM D624 |
| Resilience | 15% | 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 | — |
Environmental Performance
| Property | Value | Test Method |
| Weather Resistance | Good | — |
Regulatory / Compliance Data
| Property | Value | Test Method |
| ASTM D1056-07 | 2B1 | — |
| ASTM D1056-67 | SBE41 | — |
| ASTM D1056 Suffix’s | B2, C1, M | — |
Compliance
- FMVSS-302 — Compliant (Pass)
- Tonneau cover sealing tape requiring a soft, highly conformable closed-cell vinyl nitrile foam that compresses fully under light closure forces
- Truck tool box sealing tape in outdoor environments requiring good weather resistance in a flame-retardant NBR/PVC foam
- Curtain wall mullion end dam components in architectural glazing assemblies requiring a soft, conformable foam in thicknesses from 1/16″ to 1″
- Acoustic panel tape applications requiring a soft vinyl nitrile foam with 150% elongation and 15% resilience for sound damping in panel assemblies
- General flame-retardant sealing and gasketing across automotive and construction markets requiring ASTM D1056-07 2B1 classification and FMVSS-302 compliance
Common industries: Automotive, construction, architectural glazing, acoustics, general manufacturing.
SBE41VN is a soft, conformable closed-cell vinyl nitrile foam classified ASTM D1056-07 2B1, 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 soft, easily conformable flame-retardant foam with good weather resistance.
The NBR/PVC polymer blend distinguishes vinyl nitrile foam from EPDM/Neoprene blends, providing a different combination of chemical resistance, temperature performance, and physical properties. Compression set (max) is 25% per ASTM D1056 — lower than the EPDM soft grades. Tensile strength is 80 psi and elongation is 150% per ASTM D412. Tear strength is 17 lb/in per ASTM D624. Resilience is 15% per ASTM D2632.
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 SBE41. ASTM D1056 Suffix’s: B2, C1, M. No UL listings and no thermal conductivity value are listed on this TDS.
Compliant with FMVSS-302 (Pass).
What differentiates SBE41VN from SBE42VN in the SBE vinyl nitrile foam series?
SBE41VN is the softer grade at 2–5 psi compression deflection at 25% and 4–8 lb/ft³ density, classified ASTM D1056-07 2B1. SBE42VN is softer/medium at 5–9 psi CFD and 5–9 lb/ft³ density, classified ASTM D1056-07 2B2. SBE41VN has higher elongation (150% vs. 120%) and higher resilience (15% vs. 10%), while SBE42VN adds UL 94 HF-1 Listed status and a thermal conductivity value (.27 btu/(h·ft²·°F)) not listed on the SBE41VN TDS. SBE41VN Suffix's are B2, C1, M; SBE42VN adds A1 to its suffix set.
Why is compression set critical for a soft closed-cell vinyl nitrile foam used in tonneau cover and tool box sealing?
Tonneau covers and truck tool boxes are opened and closed repeatedly, subjecting the sealing tape to cyclic compression and release. A foam with high compression set permanently deforms under this cyclic loading, losing the contact force needed to maintain an effective weather seal — allowing moisture, dust, and air to bypass the tape. SBE41VN's compression set (max) of 25% per ASTM D1056 is the rated maximum, indicating adequate dimensional recovery to maintain sealing performance through repeated cycling over the product's service life.
What is the service temperature range for SBE41VN?
The service temperature range is -20°F to 160°F as listed on the TDS. High intermittent temperature is 220°F.
Is SBE41VN suitable for regulated automotive environments?
Yes. SBE41VN passes FMVSS-302 and is flame retardant (Yes) as listed on the TDS. No UL listings are present on this TDS.
How should SBE41VN be specified?
Specify grade (SBE41VN), ASTM D1056 designation (2B1), applicable suffix designations (B2, C1, M), thickness (from the ten available gauges), color (Black), applicable compliance requirements (FMVSS-302), dimensional tolerances, and finished format (sheet, slit roll, or die-cut component).
