No one suffered an injury and damage was minimal when insulation on piping caught fire Thursday evening at the Ranbar Technology plant in Harrison City, PA.
The fire broke out as employees were filling a drum with resin used in the paint industry, said plant manager Lenny Kulbacki, who said the company is investigating the cause of the blaze.
The company makes coatings and resins.
Kulbacki said when the fire broke out it was quickly extinguished, but it did set off an alarm.
Manor Fire Chief Greg Stutz said four employees working the final shift before an Easter weekend break evacuated as firefighters responded at 9:36 p.m.
Units from Harrison City, Claridge, Penn, Adamsburg, Irwin and Westmoreland City responded along with the Westmoreland County Hazardous Materials response team.