Silicone Foam
Silicone rubber foam, closed-cell structure, excellent high-low temperature resistance (−40~200°C) and flame retardancy (UL94 V-0). Soft, rebound, waterproof sealing. Suited for EV battery pack sealing, outdoor equipment protection and automotive electronics under harsh environments.
Key Features
- Temperature range −40~200°C for harsh environments
- Flame retardant UL94 V-0 — safe and reliable
- Closed-cell structure — waterproof sealing
- Soft rebound with shock absorption
Applications
EV battery pack sealing · Outdoor equipment protection · Automotive electronics sealing · Power equipment shock absorption
Material Tags
Technical Parameters
| Material | Silicone rubber |
|---|---|
| Density | 160–450 kg/m³ |
| Thickness | 0.5–20 mm |
| Temperature | −60 ~ 200 °C |
| Flame Retardant | UL94 V-0 |
| Structure | Closed-cell |
| Compression Set | ≤ 25% |
Frequently Asked Questions about Silicone Foam
Common questions about die-cutting and material selection for this product
PORON Foam vs EVA Foam Die-Cutting Differences?
PORON is microcellular polyurethane foam with excellent resilience and low compression set — ideal for cushioning, sealing, and repeated compression. EVA is ethylene-vinyl acetate copolymer foam — harder, lower cost, suitable for gap filling and one-time cushioning. Die-cutting processes differ: PORON requires sharp dies to prevent tearing; EVA needs controlled pressure to avoid overcuts.
How to fix burrs on foam edges after die-cutting?
Burrs are usually caused by a dull die or excessive die-cutting pressure. Solutions: use etching or laser dies (30-45 degree blade angle), adjust pressure to just cut through the material, lower the die-cutting speed appropriately, and ensure uniform material thickness. For ultra-soft foam, freeze-and-shape before die-cutting.
How to control dimensional rebound of foam after die-cutting?
Foam materials rebound 0.1-0.3 mm after die-cutting due to compression recovery. Control methods: make die clearance 5-10% smaller than material thickness, let parts rest over 30 minutes before measuring, and reserve rebound allowance in the tolerance. For high-precision parts, use a secondary finishing cut.
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