Foam weatherstripping can quiet a drafty interior door when the gap is small and the frame is sound. The most reliable result comes from cleaning the contact surface, measuring each side separately, and fitting the foam so the door closes without being forced.
Check the gap first
Close the door and look for daylight around the jamb. Confirm the hinges are tight and the latch meets the strike normally. Foam is meant to seal a modest, even gap; it should not compensate for a twisted door or a frame that has shifted.
Prepare the surface
Remove loose old material and wipe the frame with a mild cleaner. Let it dry completely. Test a short piece of the new foam in an inconspicuous place if the frame has fresh paint or a delicate finish. Measure the head and jambs separately so the corner joints meet neatly.
Apply without stretching
Cut each strip with clean scissors and peel back only a little release paper at a time. Press the foam straight onto the frame, keeping it smooth and away from the latch opening. Do not stretch it as you apply it because it will shrink back and leave a gap at the ends.
Test the closure
Close the door several times and feel for even resistance. If the latch needs a hard push, remove and reposition the foam rather than crushing it. After a day, inspect the corners and replace only a section that has lifted. Keep spare material flat and dry for a future repair.