Sourcing Chamotte Grog from China

Chamotte grog duty and waste controls

Read from the UK Trade Tariff on 2 October 2026, chamotte or dinas earths under 2508 70 00 00 carried 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing duties and no suspensions. Heading 2508 also covers other clays and refractory minerals; see the wider fireclay guide. The table shows grog grades sharing the same tariff line.

The UK Trade Tariff attaches import and export waste controls. Waste shipment controls apply only where the material is waste. For Chinese grog made from recovered refractory material, confirm its status and the applicable import requirements with your customs broker before shipment; the requirements for a particular recovered batch have not been established here.

Confirm the commodity code using the composition, processing history and supplied form. Do not treat finished refractory bricks as loose grog. Import VAT is normally 20%; see UK import duty and VAT for the calculation.

Specify grading and firing behaviour

Describe the intended ceramic body or refractory mix. Specify the sieve grading, permitted fines, moisture, alumina and silica content, iron content, bulk density and water absorption, together with agreed test methods. Ask whether the grog comes from purpose-fired clay or recovered refractory material, and require the supplier to identify any blending.

Approve a representative sample through trials in your own mix and firing cycle. Compare shrinkage, cracking, fired colour and surface texture. Ask for batch chemistry and crystalline silica information, and plan dust control during tipping and mixing. If the material is classified as hazardous and supplied for workplace use, a safety data sheet is required.

Worked duty example

Illustrative example, not a quote: Illustrative order: 25 tonnes of chamotte grog in bulk bags under 2508 70 00 00, invoiced at £6,000 free on board, with £3,000 of freight and insurance to the UK. The customs value is £9,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £9,000, so it is £1,800. 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

Grading: sieve samples from different bags against the agreed distribution; check excess fines and oversize particles.

Material: compare batch chemistry and fired trial pieces with the approved sample; look for metal, glaze fragments and other contamination.

Condition: check moisture, caking and bag leakage on arrival before feeding the material into production.

Traceability and packing: match bag labels to batch reports and delivery documents; inspect lifting loops, seams and pallet stability.

What goes wrong

A matching trade name can hide a different particle distribution or firing history. Excess fines change the mix's water demand, while different chemistry can change fired colour or behaviour. Approve performance in your process rather than accepting appearance alone.

Recovered material may introduce contamination and uncertainty over waste status. Wet or damaged bags can also make sampling and dosing unreliable. Hold questionable batches separately while checking the material history, reports and agreed acceptance criteria.

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.