WACKER presents a new electrically conductive silicone rubber – ELASTOSIL N 9189 – developed for sealing and bonding applications, preventing operational damage in generators.

The new electrically conductive silicone rubber ELASTOSIL N 9189.

ELASTOSIL N 9189 is a non-sag compound that becomes free flowing under shear force. The product is formulated to be tin-free and falls into the category of one component RTV-1 silicone rubber grades that cure at room temperature on exposure to atmospheric humidity. Only alcohol is released during curing. The cured rubber has a medium Shore hardness and can withstand temperatures of up to 230°C over a long period.

This rubber adheres to multiple materials commonly used in the electrical engineering sector and does not require specially pretreated surfaces.

Another feature of the material is its electrical conductivity. The specific volume resistivity of the cured rubber is 10 ohm-centimeters. This means that ELASTOSIL N 9189 conducts electrical currents better than seawater and just as well as a 10% saline solution. This allows electrical charges to be dissipated very well from the surface of other materials.

ELASTOSIL N 9189 is predestined for use in generators found in large power plants. Their stator windings are usually composed of copper bars. Bonding the copper bars at the slot exits with ELASTOSIL N 9189 optimizes the electrical field and potential distribution, thus protecting the stator from malfunctions.

WACKER presents ELASTOSIL N 9189 at CWIEME 2025, a coil winding, insulation and electrical manufacturing exhibition, on June 3-5 in Berlin, Germany.

WACKER presents a new electrically conductive silicone rubber – ELASTOSIL N 9189 – developed for sealing and bonding applications, preventing operational damage in generators.

The new electrically conductive silicone rubber ELASTOSIL N 9189.

ELASTOSIL N 9189 is a non-sag compound that becomes free flowing under shear force. The product is formulated to be tin-free and falls into the category of one component RTV-1 silicone rubber grades that cure at room temperature on exposure to atmospheric humidity. Only alcohol is released during curing. The cured rubber has a medium Shore hardness and can withstand temperatures of up to 230°C over a long period.

This rubber adheres to multiple materials commonly used in the electrical engineering sector and does not require specially pretreated surfaces.

Another feature of the material is its electrical conductivity. The specific volume resistivity of the cured rubber is 10 ohm-centimeters. This means that ELASTOSIL N 9189 conducts electrical currents better than seawater and just as well as a 10% saline solution. This allows electrical charges to be dissipated very well from the surface of other materials.

ELASTOSIL N 9189 is predestined for use in generators found in large power plants. Their stator windings are usually composed of copper bars. Bonding the copper bars at the slot exits with ELASTOSIL N 9189 optimizes the electrical field and potential distribution, thus protecting the stator from malfunctions.

WACKER presents ELASTOSIL N 9189 at CWIEME 2025, a coil winding, insulation and electrical manufacturing exhibition, on June 3-5 in Berlin, Germany.