HS Code for Foam rubber blocks

Foam rubber blocks are classified under HS code 4008.19. This classification is determined by the General Rules for the Interpretation of the Harmonized System (GRI), specifically focusing on the material composition and the physical form of the product. Chapter 40 covers rubber and articles thereof. Heading 4008 specifically addresses plates, sheets, strip, rods, and profile shapes of vulcanized rubber other than hard rubber. Within this heading, a distinction is made between cellular and non-cellular rubber. Cellular rubber contains many cells (either open, closed, or both) dispersed throughout its mass, typically making it lighter and more compressible than solid rubber. Subheading 4008.19 is the residual category for cellular rubber that is not in the form of plates, sheets, or strip. Therefore, blocks—which are three-dimensional masses often used as raw material for further carving, machining, or industrial applications—fall into this specific code because they do not meet the dimensional definitions of sheets or strips. The classification process requires verifying that the rubber is vulcanized and that the cellular structure is the predominant feature. If the block were made of unvulcanized rubber, it would likely fall under heading 4005. Furthermore, if the block is made of a plastic material that resembles rubber (like certain polyurethanes), it would be classified in Chapter 39 instead. Customs authorities look at the chemical composition and the degree of cross-linking to distinguish between synthetic rubber and plastic.

Products Included

• Rectangular cellular rubber blocks
• Square foam rubber blocks
• Industrial rubber profile shapes
• Vulcanized cellular rubber rods
• Thick foam rubber masses for manufacturing

Common Misclassification

Foam rubber blocks are frequently confused with HS code 4008.11, which is reserved specifically for plates, sheets, and strip. The distinction lies in the thickness and shape; blocks are generally thicker and do not conform to the flat, thin profile of sheets. Another common error is using HS code 3921.13 for polyurethane foam blocks. While they look similar, 3921.13 is for plastics, whereas 4008.19 is strictly for vulcanized rubber.

FAQ

What is the HS code for foam rubber blocks?

The HS code for foam rubber blocks made of vulcanized cellular rubber is 4008.19.

How do you distinguish between rubber and plastic foam?

The distinction is based on the chemical composition and the vulcanization process. Rubber (Chapter 40) can be stretched and will return to its original shape, whereas plastic (Chapter 39) typically does not have the same elastic recovery properties under the same conditions.