Skogar® HT — silica aerogel composite with preox fiber
Flexible, FAR 25.853 certified, rated up to 1300 °C — the versatile Skogar® grade for aerospace and defense fire protection or complex geometries.
0.012–0.018 W/(m·K)
Thermal conductivity at 20 °C
2.0 → 6.0 mm
Thickness range
Up to 1300 °C
Short-time flame exposure
FAR 25.853
+ UL94 V-0 certified
Product overview
Flexible, fire-certified, built for complex geometries.
Skogar® HT combines silica aerogel with a preox fiber substrate to create a flexible, drapeable sheet that conforms to curved surfaces and complex shapes. Where ST excels in flat or rigid integration, HT addresses geometries that rigid grades cannot easily accommodate — engine nacelles, fuselage frames, vehicle interiors, complex housings.
FAR 25.853 (Appendix F) certified makes HT particularly suited for aerospace fire protection, where compliance is a hard prerequisite for any cabin or fire zone application. UL94 V-0 covers non-aero use. Up to 1300 °C short-time flame exposure — higher than ST, suitable for engine bays and other high-temperature environments.
Easy to cut and laminate. Low dust. Hydrophobic surface chemistry resists moisture and limits exposure to common industrial fluids.
Typical applications
- Aircraft — engine nacelle insulation, APU thermal protection, cargo compartment fire liners
- Defense — crew compartment, engine bay protection, vehicle IR signature management
- Batteries — pack-level fire barriers, especially for aerospace battery systems requiring FAR 25.853
- Space — conformable thermal blankets, propulsion bay insulation for launch systems and upper stages
- Cryogenic systems — insulation of liquid hydrogen tanks, feed lines, and surrounding structures for aerospace and advanced mobility applications
Technical specifications
| Substrate | PAN preox fiber |
|---|---|
| Short-time flame exposure | Up to 1300 °C |
| Thermal conductivity (20 °C) | 0.012–0.018 W/(m·K) |
| Heat capacity (Cp) | ≈ 1100 J/kg/K |
| Available thicknesses | 2.0 / 2.5 / 3.0 / 3.5 / 6.0 mm |
| Thickness tolerance | ± 0.3 mm |
| Density | 140–180 kg/m³ |
| Stiffness | Flexible |
| Compression set @ 50% | ≤ 35% |
| Surface chemistry | Hydrophobic |
| Flammability | UL94 V-0 |
| Aerospace fire compliance | FAR 25.853 Appendix F |
Not sure HT is the right grade?
HT is the right choice when you need flexibility, FAR 25.853 compliance, or temperatures above ST’s range. For ultra-thin or rigid applications, choose ST. For temperatures beyond 1300 °C, see VHT & UHT.
Skogar® ST
Rigid, glass fiber substrate, from 0.5 mm. Choose ST when you need ultra-thin profile and rigidity — battery inter-cell barriers, electronics housings, thermal and IR management layers.
Skogar® VHT & UHT
Silica or ceramic fiber substrate. Up to 1400/1700 °C. FAR 25.853 certified. Choose VHT or UHT for re-entry shields, exhaust zones, and environments above 1300 °C.
Full comparison
Side-by-side specs for all four Skogar® grades — thermal conductivity, thickness, temperature range, certifications.
Ready to evaluate Skogar® HT?
Our engineering team supports grade selection, certification documentation, and integration design for aerospace, defense, and high-temperature applications.