S-Glass Roving for Aerospace Composites
S-glass rovings offer higher strength than E-glass, used in aerospace structural composites like aircraft skins and rocket casings. Classified under HTS 7019.12.00 as continuous glass fiber rovings for advanced reinforcement applications.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If when woven into fabrics
Woven glass fabrics from rovings move to 7019.40, no longer classified as raw rovings.
If used as continuous filaments without bundling
Unprocessed continuous filaments lack roving structure, falling under drawn/wound glass profiles.
If for lower-grade mineral fiber rovings failing glass wool criteria
Non-qualifying compositions per Chapter notes classified as slag wool in mineral chapter.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide tensile strength test certificates to distinguish S-glass from standard E-glass for proper valuation
• Ensure declaration of filament diameter and twist level (zero for rovings) to prevent reclassification
• Check for anti-dumping duties on specific glass fiber origins; maintain supply chain traceability
Related Products under HTS 7019.12.00
E-Glass Roving for Wind Turbine Blades
E-glass rovings are continuous fiber bundles of glass filaments designed specifically for reinforcing composite materials in wind turbine blades. They fall under HTS 7019.12.00 as rovings, which are untwisted and lightly sized assemblies of glass strands used in filament winding and pultrusion processes.
AR-Glass Roving for Concrete Reinforcement
Alkali-resistant (AR) glass rovings resist cement's alkaline environment, used to reinforce concrete, GRC panels, and shotcrete applications. HTS 7019.12.00 covers these specialized rovings as continuous glass fiber assemblies.
C-Glass Roving for Chemical-Resistant Laminates
C-glass rovings provide corrosion resistance for pipes, tanks, and chemical processing equipment laminates. They qualify under HTS 7019.12.00 as rovings of glass fibers including fused silica variants.
Direct Roving 2400 Tex for Filament Winding
Direct-drawn rovings at 2400 tex linear density for high-speed filament winding of pressure vessels and pipes. HTS 7019.12.00 specifically includes these single-end rovings essential for automated composite manufacturing.
Powder-Bonded E-Glass Roving for Pultrusion
E-glass rovings with powder binder sizing optimized for pultrusion dies producing structural profiles. Falls under HTS 7019.12.00 as standard glass fiber rovings for thermoset composite processing.