Reinforced microporous matrix
An opacified blend of pyrogenic silica with dispersed filament reinforcement forms one rigid insulation core matrix.
Rigid microporous insulation
SilthermBoard
A rigid board format built for flat, shaped and machined thermal boundaries.
Siltherm Board is a rigid microporous insulation format for flat linings and converted components. Grade and thickness are selected for the operating duty.
Material and surface state
Core, covering and geometry define the supplied board.
The reinforced microporous core provides the insulation. Optional coverings and machining prepare the board for the way it will be handled and installed.
Without encapsulation
Available without encapsulation for applications where handling, environment and installation controls are defined.
Glass-fleece or polyethylene covering
Glass-fleece and polyethylene coverings support different handling and interface requirements.
Aluminium-foil covering
An aluminium-foil covering is available for constructions that benefit from a metallic surface layer.
Geometry development
Shape the board for the equipment boundary.
Siltherm Board can be cut, shaped, drilled or punched with conventional tools or automated machinery. The conversion route is chosen around the required component geometry.
Cut and shape
Flat blanks, edge profiles and defined outlines
Saw and drill
Machined dimensions, holes and penetrations
Punch
Repeatable openings within a reviewed process
Fix
Install with suitable adhesive, retaining pins or anchors
Thermal performance
Thermal conductivity across the temperature range.
ASTM C177 data describes the Grade 1000 microporous core at the stated mean temperatures. Installed performance is then checked against the final board layout.
Thermal conductivityW/m·K
Standard board1000 x 600 mm
Maximum board1200 x 600 mm
Standard thickness5-50 mm
Size tolerance+/-3 mm
Thickness tolerance+/-1 mm
Standard boards are 1000 x 600 mm, with sizes up to 1200 x 600 mm listed in the July 2025 product data.
Typical applications
Rigid insulation for flat and shaped equipment areas.
Siltherm Board supports backup insulation across industrial furnaces, metal processing, glass production and other high-temperature equipment.
Technical data sheet
Request the current Siltherm Board data sheet.
Request the current data sheet and a Siltherm specialist will help confirm the grade, thickness and covering for your application.
DocumentSiltherm Board Product Data Sheet
Current revisionJuly 2025
IncludesDimensions, material properties and test methods
Technical follow-upGrade, thickness, covering and current availability
Engineering discussion
Describe the board position, shape and surrounding construction.
Tell us the equipment type, temperature profile and available build-up. Keep confidential drawings out of the first enquiry.
Discuss a Board applicationUse the first enquiry for non-confidential application information only.