BLUESIL MF 345 U may be stored at temperatures between -5°C / 23°F and 40°C / 104°F for up to 18 months from its date of manufacturing.Please consult the Safety Data Sheet of this product.


BLUESIL MF 345 U is a very transparent silicone heat-curing elastomer which vulcanizes after the addition of an organic peroxide selected in accordance with the transformation process.

Fire Protection;Heat Protection;High Temperature Protection;Sealing

HCR Masterbatch

  • Only slight freshening required,
  • Short post-cure,
  • High transparency,
  • High mechanical properties. Offers a good compromise between tear strength and compression set.

Molding and extrusion of transparent parts with high mechanical properties.

Europe Middle East Africa;Central and South America;North America




Elongation460MonocompNF ISO 37%
Hardness45MonocompASTM D 2240sh.A
Density1.115MonocompISO 2781g/cm3
Tensile strength7.2MonocompNF ISO 37MPa
Tear strength31MonocompASTM D 624AKN/m




































Rubber General Guide General Guide