PCBs in Caulk and Residential Demolition
Caulk containing potentially harmful polychlorinated biphenyls (PCBs) was used in many buildings in the 1950s through the 1970s.
![caulk containing PCBs](/sites/static/files/styles/medium/public/2013-06/pcb-caulk-cdc.jpg)
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.