PCBs in Caulk and Residential Demolition
Caulk containing potentially harmful polychlorinated biphenyls (PCBs) was used in many buildings in the 1950s through the 1970s.
PCB caulk was commonly used to seal the joints of brick, masonry, stone, and metal window frames.
PCBs in caulk have not been found in single-family homes. EPA has only found the chemical in caulk in large, older apartment complexes and some older buildings, such as schools.