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Project History
The PJM Building in Pennsburg, Pennsylvania is home to
PJM Interconnection, one of the world’s largest competitive
wholesale electricity markets. This square-shouldered
building was once a part of the Bell Telephone switching
network. Years of weathering and neglect took its toll
on the exterior cast-in-place concrete building, leaving it
blotchy and discolored. Architect Kling Stubbins asked
Conproco to provide coating options. The overall goal
was to make the building’s exterior more uniform without
imparting a heavy, painted appearance. A set of oversized
sample panels helped determine that the best solution
would be M3P Stain. Culbertson Restoration applied
two coats of M3P Stain, which provided the best balance
of good hiding power with a natural appearance.
M3P Stain provides permanent protection from water entry
and carbonation. Also, unlike traditional paints, M3P Stain
does not form a film; therefore it cannot peel, blister or flake.

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Architect
Kling Stubbins,
Philadelphia, PA

Contractor
Culbertson
Restoration, Ltd.,
West Chester, PA

Distributor
TB Philly, Inc.,
Phoenixville, PA