SILBIONE PRIM 70073 needs to be applied in a thin film to be efficient as adhesion promotor (1 - 3 microns recommended).

In order to limit the thickness of the primer film we recommend dilution of SILBIONE PRIM 70073 50:50 by volume with Isopropanol prior to application.

Once diluted it can be applied by air spray on metal surfaces which have to be clean, dry, grease and dust free, for optimum adhesion.

The SILBIONE PRIM 70073 coating has to be left to dry at ambient temperature (typically 15-40°C) for at least 30 to 60 minutes (while being protected from dust) before applying the SILBIONE CAF or SILBIONE CAF DISPERSION over coats.

This is the minimum drying time, required to allow the solvent to evaporate completely before overcoating.

The complete evaporation of the solvent is required for both, a perfect adhesion promotion and the elimination of any risk of migration of residual solvent through the overcoated SILBIONE CAF or SILBIONE DISPERSION CAF layer into processed food.

Attention, if the SILBIONE CAF or SILBIONE CAF DISPERSION is applied before complete evaporation of the primer's solvent we do not guarantee adhesion and food contact compatibility.

The overcoating can only be carried out after complete solvent evaporation. Then, once the primer layer completely dried, the overcoating can take place typically by spray application of the elastomer dispersion. Air spray, air-assisted and air-less systems are convenient.

The coating can be applied up to 3 days after the primer as long as the primer surface is protected from dust and other pollutant deposit.

Settled dust will cause adhesion problems and must be avoided.

SILBIONE PRIM 70073 may be stored at temperatures between -5°C / 23°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.


SILBIONE PRIMER 70073 is an adhesion promoter for SILBIONE CAF and SILBIONE CAF DISPERSIONS (one component room temperature curing silicone elastomers).



SILBIONE PRIM 70073 is not intended for direct food contact. It is only meant to be used in food contact applications when overcoated by food contact compatible release formulations like SILBIONE elastomer type products.

SILBIONE PRIM 70073 is to be applied as an adhesion promoter, in layers of just a few microns.

SILBIONE PRIM 70073 enhances the adhesion of elastomeric coatings like SILBIONE CAF 72576 (red), SILBIONE DISPERSION CAF 71528 (black), SILBIONE DISPERSION CAF 71500G (Grey) on metal moulds.

These coatings are intended for use in dough baking, for bread and cake production.

SILBIONE PRIM 70073 provides improved adhesion to these elastomeric release coatings on various metal surfaces:

  • Baking trays or grids.
  • Stainless steel trays or moulds.
  • Stainless steel mesh trays.
  • Perforated aluminium trays.
  • Aluminium trays or moulds.

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Flash point12MonocompAFNOR T 60°C
Specific Gravity​0.83Monocomp