Fire crews were called to the premises of Audience Systems Ltd on the West Wilts Trading Estate in Westbury this morning.
A small fire in a powder coat machine is causing concern because there is asbestos in the building.
In addition to fire crews from all over the area, the incident control unit from Devizes is in attendance.
From the scene Director of the company, Keith Ritson, said: “It’s a minor incident on a powder coat process.
“At this stage we don’t know if it’s an actual fire or just smouldering.”