Wipe away imperfections with a cloth soaked in great stuff foam cleaner.
Electrical conduit spray foam.
Fst is a proven solution that has been used for years to protect switchgear panels riser poles combiner boxes meters and all types of electrical and telecommunication apparatus.
Invert can and insert it into the gap between wall and electrical box.
Activate can by pulling the trigger.
When ready to change cans shake the new can of foam for a minimum of 60 seconds.
1 normal spray foam has chemicals in it including solvents and formaldehyde which dissolve the insulation on electrical wiring ditto to caulks 2 putting foam in there will thermally insulate the wiring potentially causing it to heat up more than it should.
Foam should be tack free in 10 to 15 minutes.
In their continuing education class the instructor mentioned that the national electric code is monitoring the use of field applied spray foam and electrical wiring that becomes imbedded in the process.
Store upright with a foam dispensing gun attached.
It creates a semi permanent seal and is reenterable.
Always leave a can of foam attached to the gun with the flow control screw closed.
The fst seal has excellent adhesion to pvc rigid steel emt imc fiberglass and polyethylene conduits.