Saint-Gobain® Norseal® 520GF Silicone Foam Tape
Saint-Gobain® Norseal® 520GF Silicone Foam Tape is a high-performance, flame-retardant tape designed for critical sealing and insulation applications in harsh environments. Constructed from F-20 closed-cell silicone foam and combined with a film-supported acrylic adhesive, 520GF provides superior durability, dimensional stability, and resistance to weathering, temperature extremes, and chemical exposure. Its medium density and robust adhesive system make it ideal for sealing enclosures, dampening vibration, and providing thermal protection in aerospace, electronics, and industrial applications.
Applications include: Military, drones, GPS, walkie talkies, environmental gasketing.
- Excellent resistance to UV, ozone, moisture, and chemicals
- Ideal for medium force gasketing, sealing, and thermal insulation in rugged operating conditions
- Available from thickness ranging from 0.063 in to 0.25 in
- Flame retardant foam
| Property | Specification |
| Backing (Carrier) Material | F-20, medium firm closed-cell flame-retardant silicone foam |
| Adhesive Material | PET Reinforced Acrylic |
| Density (Metric) | 320 kg/m³ |
| Density (Imperial) | 20 lb/ft³ |
| Compression Force Deflection (kPa) | 55.2 kPa |
| Compression Force Deflection (PSI) | 8 psi |
| Compression Set (22 hrs. at 100°C/50%) | 5% |
| Water Absorption | <1% |
| Thermal Conductivity K Value (W/(m⋅K)) | 0.074 |
| Tensile Strength (kPa) | 172 kPa |
| Tensile Strength (PSI) | 25 psi |
| Elongation at Break | 75% |
| Shielding Effectiveness (Average 300kHz - 2.5GHz) | |
| Product Color | Dark Gray |
| Dielectric Strength | 80 V/mil |
| Volume Resistivity | 3.39 x 10^14 |
| Insulation Resistance | |
| Certifications | UL 94V-0 rated |
| Thickness (Imperial) | 0.0625-0.25" |
| Thickness (Metric) | 1.59-6.35 mm |
| Maximum Operating Temperature (Celsius) | 105°C |
| Maximum Operating Temperature (Fahrenheit) | 221°F |
| Minimum Operating Temperature (Celsius) | -30°C |
| Minimum Operating Temperature (Fahrenheit) | -22°F |
