More usable volume
Reduce the space occupied by insulation in refrigerators, storage equipment, transport packaging and other constrained designs.
Rigid microporous vacuum insulation
SilthermVacuPanel
VacuPanel delivers high thermal resistance in a slim, self-supporting panel for cold-chain, appliances and other space-constrained systems.
Product formRigid vacuum panel
Core technologyMicroporous silica
Thickness range5-50 mm
ConfigurationsStandard / Plus
Space-efficient performance
Keep more usable space inside the thermal envelope.
The 5-50 mm panel range reduces insulation build-up and leaves more space inside the thermal envelope. Its self-supporting construction suits flat assemblies.
External environment
Heat gain
Slim VacuPanel layerUsable internal volumePreserved within a fixed design envelope
Longer temperature hold
Lower heat gain supports extended storage cycles and more stable conditions for temperature-sensitive contents.
Application-matched formats
Select Standard or Plus, silver or white barrier finishes, customised sizes and 5-50 mm thicknesses around the panel layout.
Panel architecture
A microporous core sealed within a high-barrier envelope.
A high-barrier film encloses the reinforced microporous core and maintains the vacuum that gives the panel its low conductivity.
Barrier envelope
Composite microporous coreSilica matrix + opacifier + dispersed filament reinforcement
VacuumInternal operating condition
Barrier envelope
High-barrier film encloses and protects the vacuum system.
Vacuum condition
Reduced internal pressure limits gas-phase heat transfer through the panel.
Composite microporous core
Pyrogenic silica, an opacifier and dispersed filament reinforcement form one self-supporting core matrix.
Technical data
Select Standard or Plus for the required panel performance.
At less than 1 mbar, 170 kg/m3 density and 10°C mean temperature, the listed conductivity is 0.0042 W/mK for Standard and 0.0038 W/mK for Plus within their stated thickness ranges.
| Characteristic | Condition | Standard | Plus |
|---|---|---|---|
| Thermal conductivity | <1 mbar; 170 kg/m3; mean 10°C | 0.0042 W/mK (5-50 mm) | 0.0038 W/mK (20-50 mm) |
| Thermal conductivity | Ambient pressure | 0.02 W/mK | 0.02 W/mK |
| Nominal density | Nominal range | 160-210 kg/m3 | 140-170 kg/m3 |
| Cold compressive strength | Nominal value | 145 kPa | 145 kPa |
| Humidity stability | Relative humidity | 0-60% | 0-60% |
| Colour options | Barrier finish | Silver or white | Silver or white |
Measured at 170 kg/m3 according to ASTM C518 and ISO 8301 at a mean temperature of 10°C. Thermal conductivity may increase below 10 mm thickness.
Where it creates value
Maintain temperature while protecting usable space.
VacuPanel limits heat gain without consuming excessive space. Panel grade and dimensions are matched to the application.
Building and construction
Increase thermal resistance in flat roofs, terraces, walls and attic hatches without consuming excessive build-up.
Review industry contextTemperature-controlled packaging
Extend temperature holding time in transport boxes and packages for medicines, vaccines and other sensitive contents.
Review industry contextAppliances and heating systems
Preserve storage capacity in refrigerators, freezers, tanks, boilers and temperature-controlled equipment.
Oil and gas
Limit heat gain in project-specific LNG insulation systems where maintaining liquefied conditions is critical.
Transportation
Support cabin comfort and cold-storage areas across marine, rail, automotive and aerospace applications.
Related vacuum panels
Extend the VacuPanel platform to specialist constructions.
Use VacuPanel as the general silica-core route. XF is developed for protected roof and floor build-ups; FG uses a fibreglass core.
VacuPanel XF
VacuPanel XF is designed for flat-roof and floor projects where the available insulation build-up is restricted.
Open product recordVacuPanel FG
VacuPanel FG offers four conductivity grades for refrigeration and temperature-controlled applications.
Open product recordTechnical documentation
Request current data for your panel selection.
A Siltherm specialist can provide the latest controlled TDS and help match grade, thickness, dimensions and barrier finish to the intended duty.
DocumentSiltherm VacuPanel Product Data Sheet
Current revisionJuly 2025
Test methodsASTM C518 / ISO 8301
AvailabilityProvided by a Siltherm specialist
Engineering discussion
Define the space, temperature target and panel layout.
Tell us the available thickness, internal temperature target and panel geometry. Keep proprietary design information out of the first enquiry.
Discuss a VacuPanel applicationUse the first enquiry for non-confidential application information only.