Cellulose Sealing Washers for HVAC Ductwork from Canada
Die-cut cellulose fiber washers sealing joints in heating, ventilation, and air conditioning duct assemblies. These paper-based seals under HTS 4823.90.8000 provide airtight barriers without chemical adhesives.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include airflow test data showing sealing performance for customs verification
• Package as finished seals, not raw material to avoid 48xx paper classifications