Sourcing polymer modelling clay from China

0% duty where heading 3407 applies

Read from the UK Trade Tariff on 30 September 2026, heading 3407 covers modelling pastes, including those for children's amusement, alongside specified dental preparations. This guide concerns polymer modelling clay only. The table shows product formats sharing the supplied commodity line, subject to classification.

The supplied line, 3407 00 00 00, carries 0% duty for goods from China, with no listed anti-dumping or countervailing measure, tariff suspension or attached import control. This tariff result does not replace product safety checks.

Oven-hardening polymer clay may classify with plastics, as explained in the wider modelling clay and play dough guide. Confirm the commodity code using the composition, product description and intended use before applying this duty rate.

Specify conditioning and oven curing

Agree the formulation, intended users, colour references, block weight, conditioning effort and finished texture. Specify opaque, translucent or metallic effects separately. Ask the factory to supply curing temperature and time for the agreed piece thickness, then approve samples after baking and cooling. Do not substitute air-dry clay for oven-hardening polymer clay.

For clay designed or intended for children's play, ask the relevant product regulator whether toy safety rules apply. For Great Britain, confirm any applicable conformity assessment, declaration of conformity and CE or UKCA marking requirements with that regulator. Adult craft products supplied in Great Britain must also be safe. Agree product-specific testing through testing and certification.

Worked duty example

Illustrative example, not a quote: Illustrative small-business wholesale batch of mixed-colour polymer modelling clay blocks, assuming classification under this code under 3407 00 00 00, invoiced at £20,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £22,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £22,500, so it is £4,500. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Conditioning: compare production blocks with the approved sample for kneading effort, crumbling, stickiness and visible contamination.

Colour: check each shade before and after curing, including unwanted colour transfer, changes in translucency and uneven metallic effects.

Curing: bake samples at the stated settings using a checked oven temperature, then assess cracking, distortion, tackiness and brittleness after cooling.

Packaging and documents: check block weights, wrapper seals, colour identification and batch references. For toy products, check conformity documents, markings, age warnings and the UK importer address against the supplied product.

What goes wrong

Polymer clay can arrive too firm to condition, crumble during shaping or transfer colour between shades. Pieces may scorch, remain soft or crack when the stated curing instructions do not match the formulation or thickness. Approve a cured sample as well as an unopened block, and repeat the agreed checks on production stock.

A report for a different formulation or colour selection gives little confidence in the shipment. Match reports to the ordered clay and investigate substitutions before dispatch. An adult craft description also deserves review if the packaging and intended use point towards children's play.

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.