BRB offers a comprehensive range of raw materials for formulating addition-cured elastomer systems. This includes basic vinyl polymers, such as BRB Vinyl Dimethicone, which fully comply with SVHC regulations. Additionally, the silicone hydrides are available both as in-chain and end-capped variants.

Our range of BRB Vinyl Dimethicone includes the following:

Product name Viscosity (cSt) Vinyl content (mmol/g)
BRB Vinyl Dimethicone 20 cSt 20 1.0
BRB Vinyl Dimethicone 100 cSt 100 0.38
BRB Vinyl Dimethicone 200 cSt 200 0.25
BRB Vinyl Dimethicone 500 cSt 500 0.15
BRB Vinyl Dimethicone 1000 cSt 1000 0.11
BRB Vinyl Dimethicone 2000 cSt 2000 0.08
BRB Vinyl Dimethicone 5000 cSt 5000 0.06
BRB Vinyl Dimethicone 10,000 cSt 10000 0.05
BRB Vinyl Dimethicone 20,000 cSt 20000 0.04
BRB Vinyl Dimethicone 65,000 cSt 65000 0.03

*BRB Vinyl Dimethicones

The silicone hydrides, available as both in-chain and end-capped variants, as well as inhibitors and, of course, the catalyst.

The in-chain silicone hydrides are classified as BRB Crosslinkers, while the end-capped variants fall under our BRB Modifiers.

Additionally, our product portfolio includes hybrid forms containing both in-chain and end-capped SiH groups. These hybrids provide dual functionality, serving as both crosslinking agents and chain extenders.

Product name Type of SiH Viscosity (cSt) SiH content (mmol/g)
BRB Crosslinker 434H4 Pendant 50 4.0
BRB Crosslinker 1595 H7 Pendant 30 7.0
BRB Crosslinker 1738 H1.9 Pendant 53 1.9
BRB Crosslinker 959 H2.5 Pendant & End capped 30 2.5

*BRB Crosslinkers SiH functional (in-chain)

...and, of course, our BRB Modifiers, which are essential for formulating lower-viscosity RTV-2 systems.

Product name Type of SiH Viscosity (cSt) SiH content (mmol/g)
BRB Modifier 1439 End-capped 5 2.5
BRB Modifier 1449 End-capped 13 1.3

To control the reaction speed, we also offer BRB Inhibitors, which are available in liquid form for easy handling and precise dosing.

Product name Viscosity (cSt) Density (g/cm3)
BRB Vinyl M2 1 0.81
BRB Vinyl D4 4 0.98

*BRB Inhibitors

To complete the package, we also offer Karstedt Platinum catalyst, available in a standard concentration of 10,000 ppm, with options for different active platinum concentrations.


To complete our toolkit, we offer a variety of Vinyl MQ resin blends as well as solid vinyl-functional resins.

Product name Appearance Viscosity (cSt) Vinyl content (mmol/g)
BRB MQ 322 Clear transparent liquid 5500 0.20
BRB MQ 325 Clear transparent liquid 6500 0.26
BRB MQ 330 Clear transparent liquid 6500 0.30
BRB MQ 339 Clear transparent liquid 6500 0.22
BRB MQ 393 Clear transparent liquid 50000 0.20
BRB VMQ 100 White powder - 0.9

For more information, please contact your local representative, whose details can be found on our website.