​For more information, please download the TDS available in PDF format below.

SILCOLEASE RCA 391 may be stored at temperatures between -20°C / -4°F and 30°C / 86°F for up to 18 months from its date of manufacturing.Please consult the Safety Data Sheet of this product.


Silcolease® RCA 391 is a release modifier designed to give incremental levels of release when added to a release coating formulation.  Silcolease® RCA 391 may be used at addition levels from 1% to 100% of the polymer component in the formulation with release values increasing proportionally.  Unlike traditional tight release modifiers which are based on vinyl functional silicone resins, Silcolease® RCA 391 is based on hydride functional silicone resin technology.  As a result, Silcolease® RCA 391 may offer greater efficiency as a tight release modifier compared to vinyl functional products against certain adhesives.



• Incremental release response to incremental levels of Silcolease® RCA 391

• Most responsive with rubber based adhesives

• Good cures at high production speeds

• Lower temperature cures for thermally sensitive substrates

• Anchorage to both paper & film substrates

Excellent bath stability

North America




SiH content0.6Monocomp%