Chapter 4001 — Customs Tariff Headings

Adhesive-Grade Natural Rubber Latex

Adhesive-grade natural rubber latex is a liquid primary form of natural rubber, formulated with tackifiers that remain within the limits permitted for raw material classification. It retains its essential character as a raw natural rubber latex, suitable for use in water-based adhesives and pressure-sensitive tapes.

Balloon-Grade Natural Latex

Balloon-grade natural latex is a fine-particle natural latex concentrate used for producing party and latex balloons. It includes optical brighteners solely for identification purposes, which are permitted under Chapter 40 Note 5, and remains in a liquid primary form.

Carpet Backing Latex

Carpet backing latex is natural rubber latex used to impregnate tufted carpet backings. It is a liquid primary form of natural rubber, uncompounded with any additives beyond those permitted for raw material classification, and is intended for further processing.

Centrifuged Natural Rubber Latex HA Type

Centrifuged natural rubber latex HA type is a high-ammonia latex concentrated by centrifugation to 60% dry rubber content. It is an uncompounded liquid primary form with minimal allowed stabilizers, making it suitable for tire cord dipping and adhesive production.

Condom Manufacturing Latex

Condom manufacturing latex is an ultra-low protein natural latex used for producing barrier condoms. It is a raw, uncompounded liquid primary form of natural rubber, with only minimal additives for stabilization and preservation, and is intended for further processing.

Field Latex Natural Rubber Concentrate

Field latex natural rubber concentrate is fresh natural latex concentrated in-field to 30-50% dry rubber content before further processing. It is a liquid primary form with allowed coagulants, used in mattress foam production, and retains its raw material character.

Foam-Grade Natural Rubber Latex

Foam-grade natural rubber latex is specially stabilized natural latex for producing latex foam rubber in upholstery and bedding. It is an uncompounded liquid primary form with permitted foaming agents, retaining its raw character for further processing.

High Ammonia Natural Rubber Latex

High ammonia natural rubber latex is preserved with 0.7-1.0% ammonia to prevent coagulation during storage and transport. It is a liquid primary form of natural rubber, uncompounded with any additives beyond preservatives, and is used in foam mattresses and carpets.

Industrial Glove Dipping Latex

Industrial glove dipping latex is heavy-duty natural latex for chemical-resistant work gloves, and may be prevulcanized for thickness. As prevulcanized latex is explicitly included in the tariff item, it remains a liquid primary form of natural rubber.

Low Ammonia Natural Rubber Latex LA Type

Low ammonia natural rubber latex LA type has reduced ammonia (0.2-0.4%) with secondary stabilizers for sensitive applications like condoms and balloons. It remains a liquid primary form with permitted viscosity-control agents, retaining its raw character.

Mattress Foam Natural Latex

Mattress foam natural latex is stabilized natural latex for Dunlop or Talalay mattress foam production. It is a liquid primary form with emulsifiers, which are permitted under Chapter 40 Note 5, and retains its essential character as a raw material.

Medical Glove Dipping Latex

Medical glove dipping latex is high-purity, low-antigen natural latex for powder-free medical examination gloves via ceramic former dipping. It is a prevulcanizable primary form, uncompounded with any additives beyond those permitted for raw classification.

Pre-vulcanized Natural Rubber Latex

Pre-vulcanized natural rubber latex is natural latex that has been partially cross-linked with sulfur and accelerators for dipping processes in glove manufacturing. It is explicitly included in the tariff item as 'whether or not pre-vulcanized' and remains a liquid primary form.

Tire Cord Dipping Latex

Tire cord dipping latex is RFL-compatible natural latex for tire cord adhesion. It is a raw liquid primary form, uncompounded with any additives beyond those permitted for raw material classification, and is used in tire manufacturing processes.

Vulcanization-Accelerated Natural Latex

Vulcanization-accelerated natural latex contains minimal accelerators for controlled prevulcanization in surgical glove dipping lines. It is a liquid primary form, and the accelerators are permitted under Chapter 40 Note 5 for prevulcanized latex, retaining its raw character.

Grade 1 RSS1 Smoked Rubber Sheets

Grade 1 RSS1 Smoked Rubber Sheets are high-quality smoked sheets of natural rubber, produced by coagulating latex, rolling into sheets, air-drying, and smoking over wood fires for preservation. They are uncompounded primary forms, classifying under tariff item 4001.21.00.

Heavy Smoked Rubber Sheets (RSS5)

Heavy Smoked Rubber Sheets (RSS5) are natural rubber sheets produced from coagulated latex, smoked to preserve and darken them. Despite higher impurities, they remain in primary form as smoked sheets, uncompounded and without prohibited additives, fitting tariff item 4001.21.00.

Malaysian SIR20 Equivalent RSS1 Sheets

Malaysian SIR20 Equivalent RSS1 Sheets are Grade 1 smoked sheets comparable to SIR20 standard, featuring high purity and smoke aroma for natural preservation. They are uncompounded primary forms, used in medical gloves and adhesives production, fitting tariff item 4001.21.00.

Premium Indonesian RSS1 Smoked Sheets

Premium Indonesian RSS1 Smoked Sheets are Grade 1 smoked rubber sheets sourced from Indonesian plantations, featuring light brown color, high elasticity, and low ash content. They are uncompounded primary forms, classifying under tariff item 4001.21.00.

Ribbed Smoked Blanket Sheets

Ribbed Smoked Blanket Sheets are large, blanket-style smoked natural rubber sheets without ribs, coagulated and dried in bulk for industrial use. They are in primary form as smoked sheets, uncompounded, and meet the definition of smoked sheets under tariff item 4001.21.00.

Ribbed Smoked Sheets (RSS1)

Ribbed Smoked Sheets (RSS1) are high-quality natural rubber sheets produced by coagulating latex from Hevea brasiliensis, rolling into ribbed sheets, and smoke-drying over wood fires. They are uncompounded primary forms, meeting the smoked sheets definition under tariff item 4001.21.00.

Ribbed Smoked Sheets (RSS2)

Ribbed Smoked Sheets (RSS2) are standard-grade smoked sheets of natural rubber, lightly stained but technically clean, with dirt content under 0.20%. Made via traditional coagulation and smoking, they qualify as smoked sheets in primary form under tariff item 4001.21.00.

Ribbed Smoked Sheets (RSS3)

Ribbed Smoked Sheets (RSS3) are smoked natural rubber sheets with moderate staining and slightly higher dirt content (max 0.55%), suitable for tire and footwear compounding. They are uncompounded primary forms, falling under tariff item 4001.21.00 as smoked sheets.

Ribbed Smoked Sheets (RSS4)

Ribbed Smoked Sheets (RSS4) are lower-grade smoked sheets with higher ash content (max 1.0%) and visible bark specks, used in lower-end rubber products. They meet the 'smoked sheets' definition without prohibited additives, classifying under tariff item 4001.21.00.

Sri Lankan Grade 1 Pale Smoked Rubber Sheets

Sri Lankan Grade 1 Pale Smoked Rubber Sheets are pale-colored Grade 1 RSS1 sheets from Sri Lanka, lightly smoked for optimal preservation without darkening. They are uncompounded primary forms, fitting tariff item 4001.21.00.

Sri Lankan Smoked Rubber Sheets

Sri Lankan Smoked Rubber Sheets are ribbed smoked sheets with consistent quality for automotive use. They are uncompounded natural rubber in primary form, fitting tariff item 4001.21.00 as smoked sheets.

Sumatra Smoked Rubber Sheets

Sumatra Smoked Rubber Sheets are Indonesian-origin smoked sheets known for earthy aroma, ribbed and dried traditionally. They are uncompounded primary forms, classifying under tariff item 4001.21.00 as natural rubber smoked sheets.

Thai Grade 1 Smoked Rubber Sheets

Thai Grade 1 Smoked Rubber Sheets are superior Grade 1 (RSS1) smoked sheets from Thailand, known for consistent thickness (2.5-3mm), high tensile strength, and preservation through low-temperature smoking. They are uncompounded primary forms, classifying under tariff item 4001.21.00.

Thin Smoked Rubber Sheets (Adi Sheets)

Thin Smoked Rubber Sheets (Adi Sheets) are premium thin smoked sheets prized for clarity and uniformity, used in high-end latex products. They qualify as primary smoked natural rubber sheets under tariff item 4001.21.00.

Vietnamese Smoked Rubber Sheets

Vietnamese Smoked Rubber Sheets are high-volume RSS-grade smoked sheets meeting international standards for export. They are uncompounded primary forms, fitting tariff item 4001.21.00 as smoked natural rubber sheets.

Brown Crepe TSNR

Brown crepe TSNR sheets are produced from low-grade coagulum and technically specified to meet international standards. They are in primary sheet form, uncut or simply cut to rectangular shape, and retain the essential character of raw natural rubber.

ESTR 20 Easy Standard Thai Rubber

ESTR 20 is an enzyme-treated TSNR in bale form, processed to improve processing ease. It meets technical specifications for dirt, ash, and nitrogen content, and is in a primary bulk form as defined in Chapter 40 Note 3.

HV Rubber High Viscosity TSR

High viscosity TSNR bales are produced via low-temperature coagulation and controlled for viscosity to suit tire tread applications. They are in primary bale form, uncompounded, and meet TSNR technical specifications.

Pale Crepe TSNR Grade

Pale crepe TSNR sheets are technically specified with low color for medical applications. They are in primary sheet form, uncut or simply cut, and retain the essential character of raw natural rubber without prohibited additives.

RSS 1 Ribbed Smoked Sheets Natural Rubber

RSS 1 is the highest grade of ribbed smoked sheets, technically specified with very low dirt content and high initial plasticity. It is in primary sheet form, produced by coagulating, rolling, and smoke-drying natural latex.

RSS 3 Ribbed Smoked Sheet Rubber

RSS 3 is a technically specified ribbed smoked sheet grade with slightly higher dirt content (0.20%) than RSS 1, suitable for tire carcasses and conveyor belts. It is in primary sheet form, uncompounded.

RSS 5 Ribbed Smoked Sheets Grade 5

RSS 5 is an economy-grade TSNR with higher dirt tolerance (0.50%), used for general compounding. It is in standard sheet form, technically specified, and in primary form as defined in Chapter 40 Note 3.

SIR 20 Technically Specified Natural Rubber

SIR 20 is a standard grade of TSNR produced from coagulated natural latex, meeting International Rubber Study Group specifications for dirt, ash, and nitrogen levels. It is in primary bale form, uncompounded.

SIR 3L Standard Indonesian Rubber Light

SIR 3L is a light-grade TSNR with low plasticity number for easy processing in soft compounds like erasers and cements. It is in baled primary form, meeting TSNR specifications.

SIR 50 Standard Indonesian Rubber

SIR 50 is a lower-grade TSNR from Indonesian plantations, coagulated into loose crumbs and compressed into bales with higher ash tolerance (1.5%). It is in primary bulk form, suitable for cost-sensitive applications.

STD 20 Standard Thai Rubber Bale

STD 20 is a TSNR from Thailand with standard bale compression of field coagulum and a dirt content of 0.15% maximum, ideal for heavy-duty tires and belts. It is in primary bale form, technically specified.

TSR 10 Technically Specified Rubber Bale

TSR 10 is a grade of TSNR consisting of air-dried natural rubber sheets granulated and compressed into uniform 35kg bales, specified for moderate dirt (0.20%) and ash (0.75%) levels. It is in primary bale form.

TSR 20 Granulated Natural Rubber

TSR 20 granulated TSNR is compressed into bales for conveyor belting, with medium specifications for industrial use. It is in primary bale form, uncompounded, and meets TSNR standards.

TSR CV60 Constant Viscosity Rubber

TSR CV60 is a technically specified natural rubber with controlled viscosity (Mooney 60±5) achieved through enzyme treatment of coagulum, baled for consistent processing in extrusion applications. It is in primary bale form.

UTSR 5 Upper Thailand Specified Rubber

UTSR 5 is a premium crumb TSNR grade with very low impurities, compressed into bales for precision molding compounds. It is in primary bulk form, technically specified for optical clarity in technical rubber parts.

Balata Gum Plates for Industrial Chewing Gum Base

Balata gum plates are rectangular sheets of natural balata gum, a similar natural gum to rubber, used as a base for industrial adhesives and chewing gum production. They fall under this tariff item as they are in primary forms (plates) and are uncompounded, per chapter notes 3 and 5.

Brown Crepe Rubber Strip Rolls

Brown crepe rubber strip rolls are continuous strips of natural rubber, simply cut to a rectangular profile and supplied in rolls. They are classified under this tariff item as primary forms (strip) of natural rubber, uncompounded, per chapter notes 3 and 9.

Chicle Natural Gum Paste for Chewing Gum

Chicle natural gum paste is a coagulated paste in primary form, used for premium chewing gum manufacturing. It falls under this tariff item as a natural gum in primary form (paste), uncompounded, per chapter notes 3 and 5.

Guayule Rubber Granules Unvulcanized

Guayule rubber granules are unvulcanized natural rubber in granular primary form, sourced from the guayule shrub and supplied in bulk bags for tire compounding. They are classified under this tariff item as 'other' natural rubber in primary forms (granules), per chapter note 3.

Gutta-Percha Lumps in Bulk Sacks

Gutta-percha lumps are irregular lumps of natural gum, packaged in 50 kg sacks for electrical insulation production. They fall under this tariff item as primary bulk forms (lumps) of natural gum, uncompounded, per chapter note 3(b).

Jelutong Natural Gum Blocks

Jelutong natural gum blocks are irregular blocks of a similar natural gum, used for blending in rubber compounds. They are classified under this tariff item as primary bulk forms (blocks) of natural gum, uncompounded, per chapter note 3(b).

Natural Rubber Latex in Bulk Drums

Natural rubber latex in bulk drums is prevulcanized latex supplied as a dispersion for industrial dipping and coating. It falls under this tariff item as natural rubber in primary form (latex), provided it is not compounded with vulcanizing agents beyond pre-vulcanization, per chapter notes 3 and 5.

Natural Rubber Powder for Compounding

Natural rubber powder is a fine powder in primary form, micronized for specialty compounding applications. It is classified under this tariff item as 'other' natural rubber in primary forms (powder), explicitly listed in chapter note 3(b).

Pale Crepe Natural Rubber Sheets

Pale crepe natural rubber sheets are low-dirt sheets in primary rectangular form, produced by acid coagulation. They fall under this tariff item as 'other' natural rubber plates/sheets, uncompounded, per chapter notes 3 and 9.

Smoked Natural Rubber Crumb

Smoked natural rubber crumb is a crumb form of lightly smoked natural rubber from Hevea trees, supplied as a primary bulk form for easy handling in compounding. It is classified under this tariff item as 'other' natural rubber in primary forms (crumbs), per chapter note 3(b).

Balata Gum Lumps

Balata gum lumps are coagulated balata sap dried into irregular lumps, a traditional natural gum used in early golf balls and chewing gum base. They are in primary bulk form without additives. As balata is named in tariff item 4001.30.00, these lumps qualify.

Balata Gum Sheets

Balata gum sheets are derived from the latex of the bully tree (Manilkara bidentata) and are presented as thin, simply cut rectangular sheets in primary form. They are used in traditional applications such as golf ball covers and mechanical belting. As balata in primary form, they fall under tariff item 4001.30.00.

Balata Waste Scrap Prevention Blocks

Balata gum blocks are formed into large irregular shapes to minimize processing waste and are maintained in primary form. These blocks are intended for industrial belting manufacture and are not compounded or further worked. They qualify as balata in primary bulk form under tariff item 4001.30.00.

Chicle-Balata Blend Primary Paste

Chicle-balata blend primary paste is a dispersion paste blending balata with similar natural gums like chicle in primary liquid form for gum bases. It retains raw character without vulcanization. As a blend of named natural gums, it falls under tariff item 4001.30.00.