Glass-cloth envelope
E-Glass cloth provides the standard envelope for clean handling and installation across larger areas.
Rigid microporous insulation
SilthermPanel
A large-format microporous panel enclosed in glass cloth.
Siltherm Panel encloses a reinforced microporous core in durable glass cloth. Its large format gives high-temperature equipment broad, clean-handling coverage.
Classification temperature1000 °C
Standard thickness5-50 mm
Standard panel1000 x 600 mm
Maximum size3000 x 700 mm
Material architecture
A protected core designed for large-area thermal boundaries.
The glass-cloth envelope keeps the panel clean to handle. The reinforced microporous core provides the thermal resistance.
Standard thickness5-50 mm
01Glass-cloth envelope
02Composite microporous coreSilica matrix + opacifier + dispersed filament reinforcement
Composite microporous core
Pyrogenic silica, opacifying constituents and dispersed filament reinforcement form one core matrix. The reinforcement supports integrity and handleability without constituting a separate continuous layer.
Thermal response
Conductivity changes with mean temperature.
ASTM C177 data shows the core conductivity at each mean temperature. The installed panel field is sized around that duty.
ASTM C177 / microporous core specimenMean-temperature values for the microporous core specimen. Complete assembly performance depends on product configuration and installation.
Panel-field design
Coverage, joints and fixing shape the installed result.
Panel size and edge treatment can be coordinated for continuous coverage across the equipment surface.
Map the coverage
Define hot-face geometry, usable area, panel orientation, penetrations and the heat paths that bypass the insulation field.
Resolve joints and edges
Review panel interfaces, dimensional tolerance, cut edges and the sealing method before finalising the layout.
Plan fixing and access
Pins, clips, anchors, adhesives and installation access must suit the complete construction and operating duty.
Product properties
Product properties with their test conditions.
- Nominal density
- 280 kg/m3 +/-10%
- Cold compressive strength
- 0.30 MPa at 10% deformation ASTM C165
- Linear shrinkage
- <=2.5% after 24 h at 1000 °C ASTM C356 / pure core
- Length and width tolerance
- +/-6 mm Standard dimensions
- Thickness tolerance
- +/-1 mm For the 5-50 mm thickness range
Typical applications
A panel format built around industrial heat containment.
Siltherm Panel provides large-area backup insulation for furnaces, kilns, process units and temperature-protection enclosures.
Aluminium processing
Forging and reheating furnaces, tundish duties, aluminium holding and melting furnaces, launders and transfer systems.
Review routeKilns and process units
Candidate backup insulation for ceramic kilns, glass production equipment and defined oil and gas process units.
Review routeProtected equipment
Suitable for night-storage heaters and temperature-protection enclosures for measurement equipment.
Review routeTechnical documentation
Request the current Siltherm Panel product data sheet.
Request the current Siltherm Panel data sheet for dimensions, thermal properties and available constructions.
DocumentSiltherm Panel Product Data Sheet
Current revisionJuly 2025
Test methodsASTM C177, C165 and C356
AvailabilityProvided by a Siltherm specialist
Engineering discussion
Describe the panel field, temperature duty and fixing boundary.
Tell us the equipment type, operating profile and available build-up. Keep proprietary details out of the first enquiry.
Discuss a Panel applicationUse the first enquiry for non-confidential application information only.