Duct Tape is Not for DRAFTS
Duct tape is handy for a lot of things, but is not meant to effectively fix drafts.
Researchers believe the adhesive is why duct tape fails as a sealant. When heating systems reach certain heats, the glue holding duct tape causes the tape to fall off leaving areas vulnerable to energy waste.
Fix your drafts with caulking, weather stripping and or insulation and save your duct tape for other projects!