Sindanyo H91 & L21 have been developed to provide outstanding service in demanding thermal and electrical applications, where a quality high strength machinable engineering board is required.

They are Portland Cement based products reinforced with selected fibres. The products display good insulation properties, are non asbestos and non-combustible.

Sindanyo H91 & L21 exhibit low thermal conductivity characteristics which result in excellent insulative qualities. The products are strong, rigid and show high strength at elevated temperatures. They offer good impact resistance and all round toughness. They are easily machined and cut and therefore lend themselves to being ideal materials for machined components. Finished components offer high definition.


Typical Applications:

  • Arc chute materials
  • End/coil/muffle plates
  • Brazing/soldering plates
  • Muffle/core plates
  • Support plates/rods and guides
  • Machined components
  • Grippers/stops/pads


  • Asbestos free
  • Operates up to 700°C
  • Machined part definition
  • Can be threaded/tapped
  • Hard wearing
  • Resistant to most acids/alkalis
Data sheets for this product are available from our Product Data Sheet section of the website. For technical questions, lead times, prices etc please contact our team at the Southport Depot on 01704 226878