Unsaturated Polyester Resin for Fiberglass
Liquid unsaturated polyester resin in primary form used as a base for composite materials in boat hulls and automotive parts. It is classified under tariff item 3907.91.00 as an unsaturated polyester, not specifically named elsewhere in the subheading.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the resin is saturated or has a different predominant monomer
Saturated polyesters are classified under 3907.99.00.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Verify the resin is in primary form (liquid) and unsaturated
• If the resin is sold with a catalyst, section note 1 may apply, potentially changing classification
• Provide the CBSA with the resin's composition and intended use
Related Products under Tariff item 3907.91.00
Allyl Diglycol Carbonate Resin Flakes
CR-39 monomer resin (allyl diglycol carbonate) in flake primary form for optical lens casting. This unsaturated allyl polyester resin falls under tariff item 3907.91.00 as an uncompounded allyl resin with over 95% named monomer units.
Allyl Methacrylate Ester Copolymer Resin
Copolymer resin of allyl methacrylate unsaturated polyester in primary liquid form for dental composites. It fits tariff item 3907.91.00 as an allyl resin where allyl units meet the 95% threshold per the chapter notes.
Allyl Phenol Formaldehyde Hybrid Resin
Hybrid unsaturated allyl-modified phenolic polyester resin in primary form for electrical laminates. Tariff item 3907.91.00 applies as an allyl polyester where allyl exceeds other monomers by the note criteria.
Casting Unsaturated Polyester Resin
Low-viscosity unsaturated polyester resin designed for casting cultured marble countertops and decorative solid surfaces. It is in liquid primary form and qualifies as an unsaturated polyester under tariff item 3907.91.00, with the predominant monomer being unsaturated.
Clear Polyester Casting Resin
Crystal-clear unsaturated polyester resin used for embedding objects in paperweights and art sculptures. It is in primary liquid form and classified under tariff item 3907.91.00 as an unsaturated polyester, following monomer predominance rules.
Diallyl Isophthalate Resin Granules
Unsaturated polyester resin based on diallyl isophthalate in granular primary form for high-performance composites. It falls under tariff item 3907.91.00 as an allyl resin due to the allyl ester structure and over 95% qualifying monomer content.