K41-E
K41-E is a closed-cell EPDM foam built for insulation and gasketing applications that face sustained heat, weathering, or moisture — offering a wider service temperature range and better outdoor durability than standard PVC/NBR foams.
FEATURES
• EPDM closed-cell foam engineered for a wide -65°F to 300°F service temperature range
• UL 94 50E flammability rating for demanding thermal and electrical insulation applications
• Consistent 4-6 lb/ft³ density with 2-4 psi compression resistance for reliable long-term sealing
• Low water absorption (10% max.) resists moisture in outdoor and high-humidity environments
• Available in continuous rolls up to 54" wide and 1.25" thick for efficient die-cutting and fabrication
DETAILS
K41-E is a closed-cell EPDM foam classified under ASTM D1056 2A1, built for applications where sustained heat exposure, weathering, and moisture resistance matter. Its closed-cell structure limits water absorption while its EPDM base resists ozone, UV, and general weathering better than PVC/NBR blends, making it well suited to outdoor gasketing, HVAC, and automotive sealing applications. Insul-Fab converts K41-E into die-cut parts, sheets, and roll stock to match specific design and thickness requirements.
| Property | Value |
| ASTM D1056 Class | 2A1 |
| Density | 4-6 lb/ft3 |
| 25% Compression Resistance | 2-4 psi |
| 50% Compression Set | 35% max. |
| Tensile Strength | 20 psi min. |
| Elongation | 100% min. |
| Tear Strength | 6.0 lb/in min. |
| Water Absorption | 10% max. |
| Flammability | UL 94 50E |
| Service Temperature | -65oF to 300oF |
| Maximum Thickness | 1.25" |
| Standard Width | 54" |
APPLICATIONS
- Gaskets & Seals
- Thermal Insulation
- HVAC & Appliance Insulation
- Outdoor & Weather-Exposed Sealing
- Automotive & Industrial Insulation
RESOURCES
Data Sheet
- Technical Data Sheet