G790 Primer is used with Wacker RTV-2 Addition Curing Silicone Rubbers. It is a low-viscosity liquid containing reactive silanes or silicone resins. After the solvent has evaporated, a rigid film of resin is formed on exposure to atmospheric moisture at room temperature or elevated temperatures. This resin film performs two functions: to adhere both to the substrate and to the coating of RTV-2 silicone rubber.
Primer G790, undiluted: If the primer is applied undiluted, it is advisable to subsequently heat-treat the substrate. A stoving time of 15 minutes at 100C* is recommended.
Primer G790, diluted 1: 1 with white spirit: To achieve good adhesion, it is often sufficient to allow the solvent to evaporate and to cure the primer in air at room temperature for 30 minutes. Heating is then no longer necessary.