WACKER PRIMER G 790 is a solution of reactive siloxanes and silanes in an organic solvent. The primer composition can be applied to the substrate as such or diluted. During evaporation of the solvent and on exposure to atmospheric humidity at ambient temperature a rigid primer film is formed which firmly adheres to the substrate. Application of a silicone rubber onto the primed substrate and subsequent vulcanization will then result in a tight bond between the silicone rubber and the substrate.

• Toluene-free formulation – contains no toluene or other aromatic solvents, making it safer and more environmentally friendly.

  
  

• Reactive siloxane/silane solution – designed to chemically bond silicone rubber to various substrates.

  
  

• Strong adhesion promotion – forms a rigid primer film upon solvent evaporation and humidity exposure, ensuring tight bonding between silicone rubber and substrate.

  
  

• Versatile application methods – can be applied by dipping, brushing, or spraying, and used with both addition-curing and condensation-curing silicone rubbers.

  
  

• Wide compatibility – especially effective with WACKER ELASTOSIL® RTV-2 and LSR systems, enhancing durability of silicone-to-substrate bonds.

• Adhesion promotion — bonds silicone to metals. 

  
  

• Glass bonding — strong primer for transparent substrates. 

  
  

• Plastic adhesion — improves bonding to engineering plastics. 

  
  

• Electronics sealing — ensures RTV adhesion in housings. 

  
  

• Automotive assembly — primer for silicone gaskets and seals