Sourcing fluoroelastomer sheets from China

UK duty on vulcanised fluoroelastomer sheets

Heading 4008 covers plates, sheets, strip, rods and profile shapes of vulcanised rubber other than hard rubber. This guide covers fluoroelastomer sheet and strip. The table repeats the non-cellular sheet code for different buying formats; these are not separate tariff subdivisions.

Read from the UK Trade Tariff on 1 October 2026, the supplied cellular and non-cellular sheet lines carry 2% duty for goods from China. The supplied data lists no anti-dumping or countervailing duty, suspensions or attached import controls for these lines.

Confirm the commodity code using the cellular structure and supplied form. Finished cut gaskets and seals fall under heading 4016, as explained in the reference guide. For wider heading coverage, see nitrile rubber sheets.

Specify the fluoroelastomer compound and service conditions

Specify the fluoroelastomer grade, cure system, permitted fillers and whether the sheet is solid or cellular. Give the factory the fluids, cleaning chemicals, operating temperature and compression conditions it will encounter. Ask for test results for the proposed compound under those conditions rather than accepting a generic chemical-resistance chart.

Agree hardness, tensile strength, elongation, compression set, thickness tolerances, width, usable length and surface finish. State whether the buyer needs flat sheets, rolls or strip, and whether surface marks are acceptable. Keep an approved sample and link production reports to the compound and batch supplied.

UK REACH restrictions cover chemicals in articles, and registration can apply to substances in articles in limited cases. Check the compound and intended use before sale. For long or repeated skin contact, confirm any applicable PAH restrictions with HSE rather than relying solely on the reference guide. For food-contact grades, confirm the applicable requirements and supporting evidence with the relevant food safety authority. Arrange testing and certification around the intended application.

Worked duty example

Illustrative example, not a quote: 20 rolls of non-cellular vulcanised fluoroelastomer sheet, illustrative only under 4008 21 90 00, invoiced at £40,000 free on board, with £3,000 of freight and insurance to the UK. The customs value is £43,000. Duty at 2% is £860. Import VAT at 20% is charged on the customs value plus duty, £43,860, so it is £8,772. Import taxes total £9,632; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £860 of duty. The import duty and VAT guide explains each step.

Inspection checklist

Compound identity: check batch markings and compound records against the order; compare independently tested material with the approved sample where substitution is a concern.

Dimensions and surfaces: measure thickness across the width and along the roll; check usable width, flatness, pores, cracks, inclusions, bloom and roll distortion.

Sealing performance: compare hardness, tensile strength, elongation and compression set with the agreed specification; test fluid exposure and heat ageing for the intended service.

Traceability and packing: match test reports to delivered batches; check that protective packing prevents creases and contamination, and inspect sampled rolls on arrival.

What goes wrong

A sheet can match the colour and hardness of the sample while using a different polymer blend or filler loading. In service, it may swell, harden or lose its seal. Accept production on compound identity and agreed performance tests, rather than appearance alone.

Uneven thickness leaves an inconsistent sealing gap, while pores and inclusions can create leakage paths after cutting. Reports for a different formulation or batch do not establish the performance of the delivered sheet. Resolve these differences before shipment and record arrival defects against the batch.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.