Secure® 99A50R007
Secure 99A50R007 is a fire-resistant single-sided thermal interface adhesive pad featuring 0.1524 mm of uncured silicone between a 0.025 mm FEP top interleave and a 0.076 mm PTFE-coated fiberglass bottom carrier, with a thermal conductivity of 1.5 W/°C·m at 100°C and a dielectric strength of 25.5 kV/mm. The 0.178 mm overall construction delivers thermal impedance of 0.29 °C·in²/W at 380 psi across an operating range of -101°C to +204°C. UL listed (E54153) with a UL 94 V-0 flame rating and RTI 150°C/150°C for both mechanical and electrical applications.
Key Properties
- Thermal Conductivity: 1.5 W/°C·m @ 100°C (ASTM E1530)
- Thermal Impedance @ 380 psi: 0.29 °C·in²/W (ASTM E1530)
- Dielectric Strength: 25.5 kV/mm (ASTM D149)
- Durometer: 85 Shore A (ASTM D2240)
- Operating Temperature: -101°C to +204°C
- Overall Product Thickness: 0.178 mm
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Overall Product Thickness | 0.178 mm | — |
| Color | Mauve | — |
| Construction Designation | Construction 0 | Code Definitions |
| Specific Gravity | 2.50 | Arlon SQA-TMS-024 |
| Total Product Weight | 0.444 kg/m² | — |
Product Design & Construction
| Property | Value | Test Method |
| Top Interleave / Carrier | 0.025 mm FEP | — |
| Side 1 — Adhesive | 0.1524 mm Uncured Silicone | — |
| Bottom Interleave / Carrier | 0.076 mm PTFE-coated Fiberglass | — |
Mechanical Properties
| Property | Value | Test Method |
| Durometer | 85 Shore A Points | ASTM D2240 |
Thermal Properties
| Property | Value | Test Method |
| Thermal Conductivity | 1.5 W/°C·m @ 100°C | ASTM E1530 |
| Thermal Impedance @ 380 psi | 0.29 °C·in²/W | ASTM E1530 |
| Min. Operating Temperature | -101°C | — |
| Max. Operating Temperature | 204°C | — |
| Glass Transition Temperature (Tc) | -118°C | ASTM 3418 |
Electrical Properties
| Property | Value | Test Method |
| Dielectric Strength | 25.5 kV/mm | ASTM D149 |
Flame & Fire Performance
| Property | Value | Test Method |
| Flammability Rating | UL94 V-0 | UL 94 |
| UL Rating | E54153 (RTI 150°C/150°C) | UL |
| Fire-Resistant Formulation | Fire-resistant uncured silicone | — |
Processing & Packaging
| Property | Value | Test Method |
| Recommended Cure Cycle | 15 minutes @ 250°F and 50 psi | — |
| Shelf Life | 3 Months | — |
| Shelf Life Storage Temperature | 7.2°C ± 3°C | — |
| Shipment | Refrigerated shipment recommended | — |
Compliance
- UL 94 — Compliant (V-0)
- UL Listed — E54153 (RTI 150°C/150°C, Mechanical and Electrical)
- Fire-resistant thermal interface bonding
- Power electronics requiring flame retardancy
- LED module bonding in critical safety applications
- Heat sink attachment with electrical isolation
- Aerospace and defense thermal management
Common industries: power electronics, LED lighting, aerospace, defense, and safety-critical thermal management.
Secure 99A50R007 is a fire-resistant thermal interface adhesive pad in the Secure family, engineered for thermal bonding applications that combine reliable thermal transfer with documented flame retardancy.
Unlike the standard double-sided Secure adhesives, the 99A50R series uses a single-sided construction: a 0.1524 mm fire-resistant uncured silicone layer sandwiched between a 0.025 mm FEP top interleave (for clean release) and a 0.076 mm PTFE-coated fiberglass bottom carrier. This format is positioned for power electronics, LED, aerospace, and defense thermal management work where flame retardancy is a primary requirement.
Mechanical and physical performance includes 85 Shore A durometer, 2.50 specific gravity, 0.444 kg/m² total product weight, and a glass transition temperature of -118°C. Thermally, the material delivers 1.5 W/°C·m thermal conductivity at 100°C and 0.29 °C·in²/W thermal impedance at 380 psi, across an operating range of -101°C to +204°C. Electrically, the dielectric strength is 25.5 kV/mm.
The product is UL listed under E54153 with a UL 94 V-0 flammability rating and RTI 150°C/150°C for both mechanical and electrical applications. Recommended cure cycle is 15 minutes at 250°F and 50 psi. Shelf life is 3 months at a storage temperature of 7.2°C ± 3°C, and the manufacturer recommends refrigerated shipment.
Compliant with UL 94 V-0 and UL listing E54153 (RTI 150°C/150°C).
What differentiates Secure 99A50R007 from the standard double-sided Secure adhesives and from the other 99A50R grades?
The 99A50R series is a fire-resistant uncured silicone formulation with a single-sided construction — uncured silicone between an FEP top interleave and a PTFE-coated fiberglass bottom carrier — rather than the double-sided Style 1080 Fiberglass or Kapton MT–substrate constructions of the standard Secure line. Within the 99A50R series, 99A50R007 is the thinnest grade at 0.178 mm overall with 0.1524 mm of uncured silicone, sized for thermal bonding where flame retardancy is required and a thinner profile is preferred. Compared with 99A50R008 (0.203 mm silicone, 30.8 kV/mm) and 99A50R009 (0.203 mm silicone, 32.7 kV/mm), this grade has the lowest dielectric strength of the family at 25.5 kV/mm.
Why is dielectric strength important for this application?
The Secure adhesive's primary function is to bond a heat-generating component to a heat sink while keeping the two electrically isolated. The PTFE-coated fiberglass carrier and the uncured silicone provide that isolation, and the dielectric strength of 25.5 kV/mm per ASTM D149 — paired with UL RTI 150°C/150°C, V-0 flame rating, and the fire-resistant silicone formulation — establishes the voltage withstand and flame behavior required for safety-critical power electronics, LED, aerospace, and defense bondlines.
What is the operating temperature range for Secure 99A50R007?
The operating temperature range is -101°C to +204°C, with a glass transition temperature of -118°C. The UL relative thermal index (RTI) is 150°C for both mechanical and electrical applications.
Is Secure 99A50R007 suitable for UL-rated, fire-resistant electronics assemblies?
Yes. The material is UL listed under E54153 with a UL 94 V-0 flammability rating, RTI 150°C/150°C for both mechanical and electrical applications, and a fire-resistant uncured silicone formulation, making it suitable for UL-compliant power electronics, LED, aerospace, and defense thermal interface bonding.
How should Secure 99A50R007 be specified?
Specify grade (Secure 99A50R007), part geometry (die-cut, kiss-cut, slit roll, or sheet), single-sided fire-resistant uncured silicone construction (0.1524 mm) with FEP top interleave and PTFE-coated fiberglass bottom carrier, overall thickness (0.178 mm), dielectric performance requirements, UL compliance (UL 94 V-0, E54153 RTI 150°C/150°C), cure cycle, and finished format.
