Cranberry firefighters dowse remaining hot spots on the structure fire that closed north and southbound lanes of Route 19 north of Cranberry Township on Tuesday.

JACKSON TWP — A two-alarm fire closed a significant portion of Route 19 for more than two hours Tuesday.

A two-story commercial building housing Line-X & Krown of North Pittsburgh, a car protective coatings business, caught fire just before 11:30 a.m. Fire police shut down Route 19 between Jackson's Pointe Drive and Air Turbine Propeller as fire crews from Cranberry, Harmony, Callery, Adams, Connoquenessing, Butler Township, Portersville-Muddy Creek, New Sewickley and Prospect worked to control the blaze.

According to Harmony firefighters, the blaze started at the rear wall of the southernmost extension of the building. The roof on that part of the building, a metal construction, had caved in almost entirely by the time the departments left the scene around 2 p.m.

Because there were no fire hydrants in the immediate area, they activated the second alarm, bringing in tanker trucks from surrounding areas.

No cause of the fire or estimate of damage was immediately determined. The fire marshal is investigating.

Stefen Boehringer, manager of Flooring Discounters across Route 19, said he was working in the back when he smelled what he described as burning plastic. He said when he looked outside the road was filled with “brown smoke,” which obscured a ladder truck that entered Line-X & Krown's parking lot.

Two employees were inside the business at the time, firefighters said, and they escaped without injury.

Line-X & Krown provides vehicles with protective coatings, such as anti-rust underbody and pickup bed coatings. It opened last year.

Fire crews were seen cutting through the building's walls and roof to find ways to extinguish the fire. Foam was sprayed upward from openings created in the walls, and down into the partially-collapsed roof by firefighters in a ladder truck.