The BLUESIL PRIM PM 820 & PRIM PM 820 UVT are particularly easy to process because they are delivered ready to use. In all cases, they must be applied on clean and dry surfaces.
The BLUESIL PRIM PM 820 & PRIM PM 820 UVT are applied with a fibre pad or a dry clothe in a thin and uniform coat.
The working temperatures of the BLUESIL PRIM PM 820 & PRIM PM 820 UVT must be respected: +5°C to + 30°C. The use of the primers at higher temperatures will cause a very fast evaporation and thus lead to irregular layers of primers.

In order to avoid hydrolysis phenomenon, it is recommended not to leave the tin of primer in contact with atmospheric humidity but to fill only small amounts of primer into a small beaker and re-seal the bottle immediately.
After applying the BLUESIL PRIM PM 820 & PRIM PM 820 UVT it is recommended to wait a few minutes at room temperature to allow it to dry, before applying the silicone elastomer on the primer-prepared surface. A maximum opened time of 6 hours should be respected.
In all cases, if a hydrolysis phenomenon appears, it is recommended to remove the primer and to re-apply it again.
With BLUESIL PRIM PM 820 UVT type, areas where primer is applied are detectable with U.V. light and layers appear in blue colour.

BLUESIL PRIM PM 820 may be stored at temperatures between 5°C / 41°F and 30°C / 86°F for up to 12 months from its date of manufacturing.Please consult the Safety Data Sheet of this product.


BLUESIL PRIM PM 820 & PRIM PM 820 UVT are adhesion promoters for silicones elastomers: CAF one-component and RTV-2 two-components curing at room temperature, for LSR (Liquid Silicone Rubber), as well as heat curing rubbers (HCR), on a large number of substrates.
The BLUESIL PRIM PM 820 UVT contains an UV marker to visualize areas where primer has been applied using Ultra Violet light.



BLUESIL PRIM PM 820 & PRIM PM 820 UVT are ready-to-use.
BLUESIL PRIM PM 820 & PRIM PM 820 UVT allow quick and optimal adhesion development at room temperature on various types of materials subject or not to thermal stresses.

BLUESIL PRIM PM 820 & PRIM PM 820 UVT are used to improve silicone elastomer adhesion on various type of substrates such as:

  • Steels,
  • aluminium,
  • stainless steel,
  • coated steels (epoxy, PES, PU paints),
  • plastic,
  • composite materials with glass fibre, epoxy resin

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Specific Gravity0.75Monocomp
Flash point<0MonocompAFNOR T 60°C




































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