Canada Balsam is also known as Canada Turpentine, used in oil painting, toxic, and very irritating to the lining of the nasal pasages and lungs. Just the thing for a snake with an RI!

OP, if you want to give your snake RI relief until you can get it to the vet, here is what mind suggested:
- Bump up the hot spot to 93-94*F, just be very careful not to overheat! This simulates having a fever.
- Bump up the humidity so that mucus stays moist and the snake can expel it more easily.
- Isolate your snake from the rest of your collection so they don't get sick.
- Clean and disinfect your snake's enclosure daily; any germs it sheds and doesn't pick back up (because you removed the germs when you cleaned the tank) its immune system won't have to fight off.