Standard International Trade Classification
U.S. exports of Glass Fibers (Including Glass Wool) and Related Articles (SITC 66495) totaled $112.2M in August 2026.
Importers of Glass Fibers (Including Glass Wool) and Related Articles paid $7.7M in duties in August 2026, an average duty rate of 8.94% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataGlass fibers—ranging from continuous filament rovings and woven fabrics used in fiber-reinforced plastics to discontinuous glass wool used for thermal and acoustic insulation—represent one of the most commercially significant advanced-materials categories in this section. Continuous-filament glass fiber reinforcements are a primary input for wind turbine blades, automotive composites, and printed circuit board substrates, while glass wool batts and rolls are staple construction insulation products. Section 301 tariffs have affected glass fiber imports from China, and the product's dual role in both construction and high-performance composites means buyers span a wide range of industries with very different specification requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
5.0K import shipments a month
Continuous-filament glass fibers are drawn into long, uniform strands used as structural reinforcements; glass wool consists of short, randomly oriented fibers produced by centrifugal or flame-attenuation processes and used primarily for insulation. Both fall within this heading, but they are typically separated at the HTS subheading level, so accurate product-form descriptions on commercial invoices are essential.
Wind energy (blade laminates), automotive lightweighting, marine hull construction, and printed circuit board manufacturing are the primary drivers for continuous-filament reinforcement products. Building and HVAC insulation dominate demand for glass wool. These sectors have distinct quality and certification requirements, so specification sheets and mill test reports are standard documentation for commercial shipments.
Basic heading 29 of 766 in section 6
Basic heading 66495 · $112.2M of $13.0B
Trade Directory
List your company and tag the 6-digit products you trade, so the companies trading them can find you. Be the first supplier listed.
Exports · August 2026
destination
Mexico and Canada together take 60% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$87.3MYoY · free account
Exports
$112.2MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $903.2M of Glass Fibers (Including Glass Wool) and Related Articles and exported $1.0B.
Through August 2026. Source: U.S. Census Bureau.