can spray foam be used over/seal around electrical romex cabling? voids between roof rafters and drywall?

Thank you for the question. It is possible to use OSI QUAD Foam to seal around electrical Romex cabling, provided that the sheathing of the cable is not damaged or punctured to expose bare wire. However, using it to fill blind cavities or enclosed spaces that are not fully accessible generally does not work, and the end result is typically hollow spots that did not cure properly due to suffocation.