The wrong chemicals mixed together made for a bad reaction, and a hazmat team to be called in on Friday afternoon.
Langley Township fire crews were called to a warehouse on 62 Avenue at 205 Street around 2 p.m.
Employees at PM Coating were mixing a polymer paint with the wrong kind of chemical, which caused an instant chemical reaction, said assistant fire chief Pat Walker.
They had to wait for the chemical smoke to burn off.
The nearby buildings were evacuated for precaution. A private hazmat company was called in to clean it up, said Walker. No injuries were reported.
