It is necessary that connectors are reliably sealed to protect electronics from humidity, media, and corrosion. Automotive suppliers generally use silver-coated connector pins since they are more cost-efficient than gold and more reliable than copper. Silver is given an additional passivation layer to protect it from tarnish and abrasion from harsher environments. This coating is mercaptan-based and has been considered difficult to bond—that is until now.

The DELO DUALBOND GE adhesive family is optimized to reliably seal these types of pins. It not only adheres very well to the mercaptan coating, but also adheres to the typical connector housing materials PA and PBT, even under the stringent conditions of the automotive sector. Since these sealants are flexible in their cured state, they compensate for the many thermal expansions metal pins and plastic housings experience. These adhesives offer very good temperature resistance—up to +150 °C—and is able to keep connectors tightly interlocked after thermal shock tests ranging in temperature from -40 °C to +150 °C.