No special storage precautions noted. Material is stable under normal conditions. Avoid contact with oxidizing agents. Use container made of: Plastic film (outer packaging - cardboard box) For further information, refer to Section 10: "Stability and Reactivity".Please consult the Safety Data Sheet of this product.ELV;GADSL;RoHS


BLUESIL MF 620 U is a silicone master-batch vulcanizing on heating after addition of a vulcanization agent (chosen according to the transformation process).

Chemical Protection;Heat Protection;High Temperature Protection;Protection;Sealing

HCR Masterbatch



· Easy processing.
· No post cure or with slight post cure.
· Good heat stability up to 200°C.
· Wide possibility of blending with master batches from the "Mix and Fix" range.
· Bright colours easily obtained with Bluestar Silicones HCR colour bases.


  • Producing articles with low compression set and high rebound resilience.
  • ?Use in blends with MASTER BATCHES of greater hardness.


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

For information about Storage and Shelf Life for this product, please download the Technical Data Sheet.




Density1.06MonocompISO 2781g/cm3
Elongation895MonocompNF ISO 37%
Hardness19MonocompASTM D 2240sh.A
Tensile strength4.8MonocompNF ISO 37MPa
Compression set28MonocompNF T 76102%
Compression set23Monocomp%


































Rubber General Guide General Guide










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