ArmaGel® HT
ArmaGel® HT is a flexible aerogel insulation blanket suitable for elevated temperature applications with a maximum service temperature of 1200°F, available in thicknesses of 0.2″, 0.4″, 0.6″, and 0.8″ with a density of 11 lb/ft³ per ASTM C303. It delivers a thermal conductivity of 0.021 W/m·K at 75°F rising to 0.043 W/m·K at 700°F per ASTM C177, and complies with ASTM C1728 Type III, Grade 1A. The material achieves a Flame Spread Index of ≤5 and Smoke Development of ≤10 per ASTM E84, and a Reaction to Fire classification of B-s1, d0 per EN 13501-1.
Key Properties
- Thermal Conductivity @ 75°F: 0.021 W/m·K (ASTM C177)
- Service Temperature Maximum: 1200°F (ASTM C411, ASTM C447)
- Compressive Strength @ 10% Compression: ≥ 3 psi (ASTM C165)
- Density: 11 lbs/ft³ (ASTM C303)
- Linear Shrinkage Under Soaking Heat: <2% in width and length (ASTM C356)
- Flame Spread Index / Smoke Development: ≤ 5 / ≤ 10 (ASTM E84)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thickness | 0.2″, 0.4″, 0.6″, 0.8″ | — |
| Color | Grey | — |
| Material Type | Aerogel blanket | — |
| Density | 11 lbs/ft³ | ASTM C303 |
| Hydrophobic | Yes | — |
| Flexibility of Insulation Blankets | Flexible | ASTM C1101 |
Mechanical Properties
| Property | Value | Test Method |
| Compressive Strength @ 10% Compression | ≥ 3 psi | ASTM C165 |
| Linear Shrinkage Under Soaking Heat | <2% in width and length | ASTM C356 |
Thermal Properties
| Property | Value | Test Method |
| Service Temperature Maximum | 1200°F | ASTM C411, ASTM C447 |
| Hot Surface Performance | Pass | ASTM C411 |
| Thermal Conductivity @ 75°F | 0.021 W/m·K | ASTM C177 |
| Thermal Conductivity @ 100°F | 0.022 W/m·K | ASTM C177 |
| Thermal Conductivity @ 200°F | 0.023 W/m·K | ASTM C177 |
| Thermal Conductivity @ 300°F | 0.025 W/m·K | ASTM C177 |
| Thermal Conductivity @ 400°F | 0.029 W/m·K | ASTM C177 |
| Thermal Conductivity @ 500°F | 0.032 W/m·K | ASTM C177 |
| Thermal Conductivity @ 600°F | 0.036 W/m·K | ASTM C177 |
| Thermal Conductivity @ 700°F | 0.043 W/m·K | ASTM C177 |
Flame & Fire Performance
| Property | Value | Test Method |
| Flame Spread Index | ≤ 5 | ASTM E84 |
| Smoke Development | ≤ 10 | ASTM E84 |
| Reaction to Fire | B-s1, d0 | EN 13501-1² |
Environmental Performance
| Property | Value | Test Method |
| Water Absorption | Pass | ASTM C1763 |
| Water Vapour Sorption | ≤ 5 by weight | ASTM C1104 |
| Fungal Growth | No growth | ASTM C1338 |
| Stress Corrosion Cracking | Pass | ASTM C692, ASTM C795 |
Compliance
- ASTM C1728, Type III, Grade 1A — Compliant (Standard Specification for Flexible Aerogel Insulation)
- ASTM C165 — Compliant (Compressive Strength @ 10% Compression: ≥ 3 psi)
- ASTM C356 — Compliant (Linear Shrinkage Under Soaking Heat: <2% in width and length)
- ASTM C411 — Compliant (Hot Surface Performance: Pass; Service Temperature Maximum: 1200°F)
- ASTM C447 — Compliant (Service Temperature Maximum: 1200°F)
- ASTM C692 / ASTM C795 — Compliant (Stress Corrosion Cracking: Pass)
- ASTM C1101 — Compliant (Flexibility of Insulation Blankets: Flexible)
- ASTM C1104 — Compliant (Water Vapour Sorption: ≤ 5 by weight)
- ASTM C1338 — Compliant (Fungal Growth: No growth)
- ASTM C1763 — Compliant (Water Absorption: Pass)
- ASTM E84 — Compliant (Flame Spread Index ≤ 5; Smoke Development ≤ 10)
- EN 13501-1 — Reaction to Fire: B-s1, d0
- High-temperature pipe, vessel, and duct insulation in industrial, offshore, and process facilities operating to 1200°F
- Aerospace, electronic, and automotive insulation requiring lightweight, flexible, high-temperature aerogel blanket material
- Multi-layer insulation systems as a component of ArmaSound® Industrial Systems for combined thermal and acoustic performance
- Industrial pipe insulation where tight Flame Spread Index (≤5) and Smoke Development (≤10) ratings are required alongside high temperature resistance
- Insulation over austenitic stainless steel piping and equipment in chemical processing and power generation (ASTM C795 compliant)
Common industries: Oil and gas, petrochemical, power generation, aerospace, automotive, electronics, industrial manufacturing.
ArmaGel® HT is a flexible aerogel blanket engineered for elevated temperature insulation of pipes, vessels, and ducts in industrial, offshore, and process equipment facilities where service temperatures reach up to 1200°F. It complies with ASTM C1728 Type III, Grade 1A and is also suited for aerospace, electronic, and automotive applications due to its lightweight construction, flexibility, and high performance at extreme temperatures.
The material can be used in multi-layer applications with ArmaSound® Industrial Systems. Unlike ArmaGel® DT and XGC, ArmaGel® HT does not incorporate an integrated vapour barrier, making it the appropriate grade for above-ambient high-temperature insulation where condensation control is not required.
The material is hydrophobic and passes ASTM C1763 for water absorption and ASTM C1104 with water vapour sorption ≤5 by weight. Compressive strength at 10% compression is ≥3 psi per ASTM C165, linear shrinkage under soaking heat is <2% in width and length per ASTM C356, and fungal growth shows no growth per ASTM C1338. Hot surface performance passes ASTM C411, and stress corrosion cracking passes ASTM C692 and ASTM C795. Reaction to Fire is B-s1, d0 per EN 13501-1.
Compliant with ASTM C1728 Type III, Grade 1A; ASTM C165; ASTM C356; ASTM C411; ASTM C447; ASTM C692; ASTM C795; ASTM C1101; ASTM C1104; ASTM C1338; ASTM C1763; ASTM E84; EN 13501-1.
What differentiates ArmaGel® HT from ArmaGel® DT, HTL, Rail, and XGC?
ArmaGel® HT is a high-temperature grade (ASTM C1728 Type III, Grade 1A) with a 1200°F service maximum and an 8-point thermal conductivity curve from 75°F to 700°F. Unlike DT and XGC, it has no integrated vapour barrier and is not rated for cryogenic service. Compared to HTL, HT has a higher density (11 versus 9.5 lb/ft³), a higher compressive strength minimum (≥3 psi versus not listed for HTL), and a broader set of ASTM compliance tests. ArmaGel® Rail has a 230°F service maximum and is a rail-specific laminated construction.
Why does thermal conductivity matter when selecting aerogel insulation?
Thermal conductivity determines the insulation thickness required to achieve a target heat loss at the system operating temperature. ArmaGel® HT's conductivity of 0.021 W/m·K at 75°F rising to 0.043 W/m·K at 700°F allows engineers to achieve the required thermal resistance in a thinner blanket profile compared to conventional insulation materials — a significant advantage in congested industrial environments and for complex pipe geometries.
What is the service temperature range for ArmaGel® HT?
The service temperature maximum for ArmaGel® HT is 1200°F per ASTM C411 and ASTM C447 as listed on the TDS. No minimum service temperature is listed on the TDS for this grade.
Is ArmaGel® HT suitable for regulated environments?
Yes. ArmaGel® HT complies with ASTM C1728 Type III Grade 1A, achieves Flame Spread Index ≤5 and Smoke Development ≤10 per ASTM E84, and carries a Reaction to Fire classification of B-s1, d0 per EN 13501-1. It also passes ASTM C692 and ASTM C795 for use over austenitic stainless steel.
How should ArmaGel® HT be specified?
Specify grade (ArmaGel® HT), thickness, compliance requirements (ASTM C1728 Type III Grade 1A, ASTM E84, EN 13501-1, and others as applicable), dimensional tolerances, and finished format.
