ENSOLITE® IG2
ENSOLITE® IG2 is a medium/soft firmness, closed cell vinyl nitrile foam with a density of 5.5–7.5 lb/ft³ and a compression deflection at 25% of 5–9 psi per ASTM D1056. The material is flame retardant, passes FMVSS-302 at 0.094 in or thicker, and carries a service temperature range of -40°F to 200°F. It meets ASTM D1056 designation 2B2 with suffixes B2, C1, and M, and ASTM D6576 Type II A, B, Soft/Medium.
Key Properties
- Compression Deflection @ 25%: 5 – 9 psi | ASTM D1056
- Tensile Strength: 75 psi min | ASTM D412
- Elongation: 75% min | ASTM D412
- Compression Set 50%: 25% max | ASTM D1056
- Density: 5.5 – 7.5 lb/ft³ | ASTM D1056
Service Temperature: -40°F to 200°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Color | Black | — |
| Polymer | Polyvinyl Chloride (PVC) / Nitrile Butadiene Rubber (NBR) / Chloroprene Rubber (CR) | — |
| Density | 5.5 – 7.5 lb/ft³ | ASTM D1056 |
Mechanical Properties
| Property | Value | Test Method |
| Compression Deflection @ 25% | 5 – 9 psi | ASTM D1056 |
| Compression Set 50% | 25% max | ASTM D1056 |
| Compression Deflection Change After Oven Aging | 30% max | ASTM D1056 |
| Tensile Strength | 75 psi min | ASTM D412 |
| Elongation | 75% min | ASTM D412 |
| Tear Strength | 12 lb/in | ASTM D624 |
| Water Absorption | 10% max | ASTM D1056 |
| Fluid Immersion | 100% max | ASTM D1056 |
Thermal Properties
| Property | Value | Test Method |
| Service Temperature | -40°F to 200°F | — |
Flame & Fire Performance
| Property | Value | Test Method |
| Flame Retardant | Yes | — |
| FMVSS-302 | Pass @ .094″ or thicker | — |
| UL 94 HBF | Listed¹ | — |
| HF-1 | Listed¹ | — |
| V-0 | Listed¹ | — |
| 5VA | Listed¹ | — |
¹ Contact customer service for specification inquiries and UL information.
Regulatory / Compliance Data
| Property | Value | Test Method |
| ASTM D1056 | 2B2 | — |
| ASTM D1056 Suffix’s | B2, C1, M | — |
| ASTM D6576 | Type II A, B, Soft/Medium | — |
Compliance
- ASTM D1056 2B2 (Suffixes B2, C1, M) — Compliant
- ASTM D6576 Type II A, B, Soft/Medium — Compliant
- FMVSS-302 — Compliant (Pass @ .094″ or thicker)
- UL 94 HBF — Listed¹
- UL 94 HF-1 — Listed¹
- UL 94 V-0 — Listed¹
- UL 94 5VA — Listed¹
¹ Contact customer service for specification inquiries and UL information.
- Tonneau cover and truck tool box sealing tape requiring medium density foam with weather resistance
- Curtainwall mullion end dams for commercial glazing systems where greater compression resistance than IG1 is required
- Acoustic panel tape in assemblies requiring a firmer, higher-tensile vinyl nitrile foam
- Gasketing and sealing components in automotive and construction applications requiring FMVSS-302 compliance
- Fluid-resistant seals and closures in outdoor enclosures and storage systems
Common industries: Automotive, Construction, Architecture, Acoustics, Transportation
ENSOLITE® IG2 is a medium density, closed cell vinyl nitrile foam based on a PVC/NBR/CR polymer blend. It occupies the middle position in the IG series between the softer IG1 and the firmer IG3, providing increased firmness and higher tensile strength (75 psi min) for sealing and gasketing applications that require greater structural resistance under compression. Typical end uses include tonneau cover sealing tape, truck tool box sealing tape, curtainwall mullion end dams, and acoustic panel tape.
The closed cell construction provides moisture and fluid resistance, with water absorption limited to 10% max and fluid immersion to 100% max per ASTM D1056. ENSOLITE® IG2 is flame retardant and passes FMVSS-302 at 0.094 in or thicker. It carries UL 94 HBF, HF-1, V-0, and 5VA listings (contact customer service for specification inquiries and UL information). Compression deflection change after oven aging is held to 30% max, indicating stable performance under elevated-temperature conditions.
Compliant with ASTM D1056 2B2 (Suffixes B2, C1, M); ASTM D6576 Type II A, B, Soft/Medium; FMVSS-302 (Pass @ .094″ or thicker); UL 94 HBF Listed; UL 94 HF-1 Listed; UL 94 V-0 Listed; UL 94 5VA Listed.
What differentiates ENSOLITE® IG2 from the IG1 and IG3 grades?
ENSOLITE® IG2 is the medium density grade of the IG series, with a compression deflection at 25% of 5–9 psi and a density of 5.5–7.5 lb/ft³ — firmer than IG1 (2–5 psi, 4–6 lb/ft³) and softer than IG3 (9–13 psi, 7–9 lb/ft³). Its tensile strength of 75 psi min also positions it between the two adjacent grades and adds suffix C1 compliance not available on IG1.
Why is compression set critical for a closed cell foam used in sealing and gasketing applications?
Compression set measures the permanent deformation a foam retains after sustained compression. For gaskets and sealing tapes installed under long-term load, excessive compression set means the material will not recover its original thickness, reducing seal integrity and allowing infiltration of moisture, air, and contaminants. ENSOLITE® IG2 is rated at 25% max at 50% compression per ASTM D1056.
What is the service temperature range for ENSOLITE® IG2?
The service temperature range is -40°F to 200°F as stated on the TDS.
Is ENSOLITE® IG2 suitable for flame-rated environments?
Yes. ENSOLITE® IG2 carries UL 94 HBF, HF-1, V-0, and 5VA listings, and passes FMVSS-302 at 0.094 in or thicker. Contact customer service for specification inquiries and UL information.
How should ENSOLITE® IG2 be specified?
Specify grade (ENSOLITE® IG2), thickness, color (Black), compliance requirements (ASTM D1056 designation, UL listing, and/or FMVSS-302), dimensional tolerances, and finished format.
