HS Code 3811.21 — Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline)

HS Code 3811.21: Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including
gasoline) or for other liquids used for the same purposes as mineral oils: Containing petroleum oils or oils obtained from bituminous materials

HS Code 3811.21 covers Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including
gasoline) or for other liquids used for the same purposes as mineral oils: Containing petroleum oils or oils obtained from bituminous materials under the South African Harmonised Tariff Schedule. SARS uses this code to classify Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including
gasoline) or for other liquids used for the same purposes as mineral oils: Containing petroleum oils or oils obtained from bituminous materials for all import and export customs declarations.

Customs Duty Rate

The customs duty rate for HS Code 3811.21 is free (0%). Duty is calculated on the FOB customs value (the goods value at the point of loading onto the carrier; international freight and insurance are not part of the duty base). Import VAT is then 15% of the Added Tax Value (ATV) — customs value + 10% uplift (for non-SACU origin; nil for BLNS countries) + non-rebated duty.

What Falls Under HS Code 3811.21?

This tariff heading covers Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including
gasoline) or for other liquids used for the same purposes as mineral oils: Containing petroleum oils or oils obtained from bituminous materials. All importers and exporters must use this code on SARS customs declarations (SAD500), commercial invoices, and shipping documents.

How to Import or Export Under HS Code 3811.21

To move goods under HS Code 3811.21 across South African borders, you’ll need to be registered with SARS as an importer or exporter (customs client code) before your first shipment. Once registered, JLog handles your customs clearance.

JLog Customs Clearance for HS Code 3811.21

JLog provides customs clearance for goods under HS Code 3811.21. We handle the full SARS submission — from checking documents to lodging declarations and managing SARS queries.

Contact JLog: info@jlog.co.za | 021 300 6099

Frequently Asked Questions

What is HS Code 3811.21 used for?
HS Code 3811.21 is the official tariff code for Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including
gasoline) or for other liquids used for the same purposes as mineral oils: Containing petroleum oils or oils obtained from bituminous materials under the South African Harmonised Tariff Schedule. It appears on all customs declarations for these goods.

What duty do I pay on HS Code 3811.21?
The customs duty rate is free (0%). Plus 15% VAT on import. Contact JLog for a full landed cost calculation including all applicable levies.

Do I need a customs broker for HS Code 3811.21?
Not legally, but most importers use one to ensure correct filing. JLog can clear goods under HS Code 3811.21 on your behalf.

Last updated: 2026. Source: SARS Harmonised Tariff Schedule.

Related JLog Services

JLog provides customs clearance services for goods under this HS code. Our team handles SARS submissions, documentation, and query management.

• Customs Clearance South Africa — Full SARS clearance service
• DutyCheq — HS code, duty and import VAT calculator
• SARS Tariff Book — Browse all 11,887 HS codes

JLog — Customs Clearance and Logistics Technology, Cape Town