Solidified black liquid on electronic components

The purpose of this article is to clarify what is the solidified black substance sometimes noticed on the SIERA.AI Electronic components

Some times it has been noticed that a black solidified liquid is visible on some electronic components and on wire insulations. 

It might look like that something has burnt and melted but actually it is just the epoxy that is filled in the access control casing during the manufacturing process. Sometimes it over flows from the casing and gets solidified. It might look like something has burnt and melted but it is actually harm less.  

However if you want to be double-sure, please click a picture and send it to We will examine it and take immediate action if needed. 

Following pictures show an example of harmless epoxy creating an impression of something getting melted and solidified: