What is duct seal used for?

Related questions

1. Which is better a heat pump or AC?
2. Is cleaning air ducts worth it?
3. Can PVC pipe be used for HVAC duct?
4. Where do you put return air vents?
5. How do you calculate return air flow?
6. Is duct cleaning a waste of money?
7. Is flexible ductwork vs rigid ductwork?
8. What is the best duct cleaning method?
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Tags

1. #permanently
2. #designed
3. #compound
4. #clean
5. #toxic
6. #putty
7. #around
8. #electrical
9. #sealing
10. #boxes
11. #surfaces
12. #conduit
13. #adheres
14. #rectorseal
15. #which