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Primer G790 TF

Product information "Primer G790 TF"

WACKER Primer G 790 TF is a toluene- and aromatic-free primer that improves the adhesion of addition-curing silicones (RTV-2) to metals, glass and plastics. It is applied thinly by dipping, brushing or spraying and must dry for at least 1 hour before potting.

General Characteristics

Property
Condition
Value
Method
Active substance - approx. 17 wt. % -
Color - clear, yellowish  -
Density 23 °C 0.76 g/cm³ DIN 51757
Flash point - 2 °C ISO 13736
Ignition temperature (liquids) - 380 °C EN 14522
Viscosity, kinematic - 1 mm²/s DIN 51562
These figures are only intended as a guide and should not be used in preparing specifications.

Application tips: Apply the primer as thinly as possible and free of air bubbles. Allow the applied primer to dry for at least 1 hour at ambient temperature. The so-called "baking" of the dried primer film between 120°C and 150°C leads to improved adhesion, especially with metals.
 
Disclaimer
All the information provided is in accordance with the present state of our knowledge. Nonetheless, we disclaim any warranty or liability whatsoever and reserve the right, at any time, to effect technical alterations. The information provided, as well as the product's fitness for an intended application, should be checked by the buyer in preliminary trials. Contractual terms and conditions always take precedence. This disclaimer of warranty and liability also applies particularly in foreign countries with respect to third parties' rights.
Application: Universal
Silicone product groups: Primer
Silicone system: RTV-2 addition-curing
  • Adhesion preparation for addition-curing silicones (RTV-2, LSR) on metal, glass and plastics
  • Pretreatment of metals before bonding with acetic-curing one-component silicones: better adhesion and protection against corrosion
  • Very thin coats by spraying thanks to its very low viscosity (approx. 1 mm²/s); dipping or brushing also possible

Suitable for: Electronic potting, moulded parts and silicone-metal composites


Frequently asked questions

What is the advantage of the TF version?
G 790 TF is free of toluene and aromatics, making it more pleasant to work with, while being just as universally applicable.

How do I achieve the best adhesion on metal?
Prepare a clean, dry and grease-free surface and roughen very smooth surfaces. Apply the primer thinly and free of bubbles and let it dry for at least 1 hour. Baking at 120–150 °C further improves adhesion on metals.

Which primer suits which silicone?
G 790 TF for addition-curing silicones (RTV-2, LSR), G 718 x for one-component silicones (RTV-1), ELASTOSIL® AUX G 3243 for peroxide-curing solid silicone rubber (HTV).