HS Code 40.02 – Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of heading no. 4001 and 4002, in primary forms or in plates, sheets or strip

HS code 4002 is a 4-digit heading in the Harmonized System that covers: Synthetic rubber and factice derived from oils, in primary forms or in plates, sheets or strip; mixtures of heading no. 4001 and 4002, in primary forms or in plates, sheets or strip. Heading 4002 covers synthetic rubber and factice derived from oils, presented in primary forms or in plates, sheets, or strip. It also explicitly includes mixtures of natural rubber (4001) and synthetic rubber (4002) in these primary forms. This classification is vital for distinguishing man-made elastomers from their natural counterparts, encompassing a vast array of polymers like Styrene-Butadiene Rubber (SBR), Butadiene Rubber (BR), Ethylene Propylene Diene Monomer (EPDM), Nitrile Butadiene Rubber (NBR), and many others. The scope is limited to unvulcanized forms, whether solid or in latex, and typically includes crumbs, bales, pellets, or uncompounded sheets/strips. This heading is critical for trade compliance due to the diverse chemical compositions and specialized applications of synthetic rubbers, which often have different tariff rates, environmental regulations, and technical standards compared to natural rubber. Key sub-categories are often defined by the specific type of synthetic polymer (e.g., SBR, BR, EPDM, IIR). The development of synthetic rubber in the 20th century revolutionized industrial manufacturing, offering properties superior to natural rubber for specific uses (e.g., oil resistance, heat resistance). Its inclusion of mixtures acknowledges the common practice of blending natural and synthetic rubbers to achieve desired performance characteristics. This heading, alongside 4001, forms the foundational raw material base for Chapter 40, allowing for precise classification of the building blocks of the rubber industry before they are further processed into articles.

Styrene-butadiene rubber (SBR) in bales, polybutadiene rubber (BR) in crumbs, ethylene-propylene-diene monomer (EPDM) in pellets, nitrile-butadiene rubber (NBR) sheets, chloroprene rubber (CR) in primary forms, butyl rubber (IIR) in bales, silicone rubber gum, polyisoprene rubber (IR) strips, synthetic rubber latex, hydrogenated nitrile butadiene rubber (HNBR) in primary forms, acrylic rubber (ACM) in blocks, fluorocarbon rubber (FKM) in pellets, polysulfide rubber, factice derived from oils in sheets, mixtures of natural and SBR rubber in bales, thermoplastic elastomers (TPEs) in primary forms (if classified as synthetic rubber), solution SBR, emulsion SBR, liquid synthetic rubber, bromobutyl rubber, chlorobutyl rubber, ethylene vinyl acetate (EVA) rubber (if synthetic rubber).

A common mistake is confusing synthetic rubber (4002) with natural rubber (4001); the origin is the critical distinction, requiring knowledge of the material's chemical synthesis. Another frequent error is classifying compounded unvulcanized synthetic rubber under 4002 instead of 4005, as 4002 is for uncompounded or basic mixtures, while 4005 includes additional compounding ingredients. Lastly, some advanced thermoplastic elastomers (TPEs) might be confused with plastics (Chapter 39); the key is whether they exhibit the characteristic properties of rubber, such as elastic recovery after deformation.

In 2025, the top exporters of HS code 4002 in UN Comtrade data were Thailand ($3.9B, 14% of world exports), South Korea ($3.1B) and the United States ($2.5B). World exports came to about $27.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

In 2025, the top importers of HS code 4002 in UN Comtrade data were China ($10.2B, 35% of world imports), India ($1.4B) and Thailand ($1.4B). World imports came to about $29.0B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

HS code 4002 is a 4-digit heading under Chapter 40 of the Harmonized System. The first 2 digits (40) identify the chapter, and digits 3-4 (02) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.