When added on a 2-roll mill, 0.5 to 1% of BLUESIL ADD 904 has a very noticeable effect on the green strength of HCR mixtures. Whilst higher doses can be used (up to 2 %) without having a detrimental effect on the cured compounds’ mechanical properties, this may cause « mill shrinkage » to occur.
Comments: BLUESIL ADD 904 tends to increase the swell, especially on slightly charged mixtures. Furthermore, its use is not recommended in transparent mixtures.

BLUESIL ADD 904 may be stored at a temperature below 40°C / 104°F for up to 12 months from its date of manufacturing.Please consult the Safety Data Sheet of this product.


BLUESIL ADD 904 is an agent designed to increase the green strength and the viscosity of HCR mixtures to improve their processability. It has a permanent effect.

White powder.


HCR Additives

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