ARK-F40
Foil/Scrim/Kraft – Durable Insulation Facing for Thermal & Moisture Control
ARK-F40 Foil/Scrim/Kraft is a durable insulation facing designed to support thermal performance and moisture control in residential and commercial building assemblies. Its multi-layer construction combines a reflective foil surface, reinforced scrim, and kraft backing to provide a balanced combination of durability, tear resistance, and vapor-control performance.
Lightweight and easy to handle, ARK-F40 is well suited for a variety of insulation applications, including walls, ceilings, and HVAC duct systems. The reflective foil surface can help manage radiant heat transfer when properly installed as part of an appropriate assembly, while the kraft backing helps provide vapor-control performance where required.

Key Advantages:
- Multi-Layer Construction – Combines reflective foil, reinforcing scrim, and kraft backing for balanced performance.
- Reflective Thermal Performance – Foil surface helps manage radiant heat transfer when installed with the required conditions.
- Reinforced for Durability – Scrim reinforcement provides added strength and tear resistance during handling and installation.
- Vapor Control – Kraft-backed construction helps provide vapor-control performance in suitable insulation assemblies.
- Lightweight & Easy to Handle – Designed for efficient handling, cutting, and installation.
- Versatile Applications – Suitable for walls, ceilings, and HVAC duct insulation systems.
- Built for Long-Term Performance – Durable construction helps maintain facing integrity throughout installation and service.
Three Layers. One Reliable Facing.
The foil, scrim, and kraft construction combines thermal, moisture-control, and durability features in one practical insulation facing.
Built to Handle the Jobsite.
Reinforced scrim adds strength and tear resistance, helping the facing withstand handling and installation.
Reflect Radiant Heat.
The reflective foil surface helps manage radiant heat transfer when properly incorporated into an assembly with the required air space.
Help Control Vapor.
The kraft backing provides vapor-control performance for insulation applications where a suitable vapor retarder is required.
Easy to Handle.
Lightweight construction makes ARK-F40 easier to transport, cut, position, and install.
One Facing. Multiple Applications.
Designed for use across walls, ceilings, and HVAC duct insulation applications, giving contractors a versatile insulation-facing solution.
Built for Better Building Performance.
By combining reflective, reinforcing, and vapor-control features, ARK-F40 helps support the overall performance and durability of insulation systems.
| Property | Value | Testing Method |
|---|---|---|
| Basis Weight | 18 lbs/1000 ft2 (87 g/m2) | Scale |
| Permeance (WVTR) | 0.02 perm (1.15 ng/Ns) | ASTME96/ProcedureA |
| Tensile Strength | MD: 45 lbs/inch (7.9 kN/m) XD: 39 lbs/inch (6.9 kN/m) | ASTM C1136 |
| Bursting Strength | 45 psi (3.1 kg/cm2) | ASTM D774 |
| Thickness | 0.008 inch (200 micron) | Micrometer Caliper |
| Fire Rating | Class B | ASTM E84 |
| Accelerated Aging | No Corrosion No Delamination | ASTM C1258 30 Days at 95% RH 120°F (49°C) |
| Low Temperature Resistance | Remains Flexible No Delamination | ASTM D1790 -40°F (-40°C) |
| High Temperature Resistance | Remains Flexible No Delamination | 4 Hours at 240°F (116°C) |
| Water Immersion | No Delamination | 24 Hours at 73°F (23°C) |
| Dimensional Stability | 0.5% | ASTM D1204 |
| Emissivity | 0.03 | ASTM E408 |
Available Dimension:
Width:
4-6.5 ft (1.2-2 m)
Length:
Customizable
