Sourcing switchable insulating glass from China

UK duty on switchable insulating glass

Heading 7008 covers multiple-walled insulating units of glass. This guide concerns sealed insulating units incorporating a switchable privacy layer. A loose privacy film, a single laminated pane or a complete framed window needs separate classification. See the wider double-glazed units guide.

Read from the UK Trade Tariff on 2 October 2026, all supplied commodity lines carried 0% duty for goods from China. The supplied facts list no anti-dumping or countervailing duty, suspensions or import controls. Only the commodity lines supplied in the facts are shown.

Confirm the commodity code using the glass construction, coatings, cavity and shipped configuration. Do not select the opacified-glass line solely because the product switches to a privacy state. Give your customs broker the pane specification and identify any separately supplied controllers or power supplies.

Specify the privacy layer and sealed unit together

Specify pane sizes, overall thickness, safety-glass construction, cavity fill, spacer and edge seals. Identify the privacy technology, its position within the glass and the required appearance when powered and unpowered. Agree acceptable haze, privacy at the intended viewing distance, switching behaviour and cable exit positions using an approved sample.

For building use, confirm declaration of performance and marking requirements with the relevant authority, and obtain supporting glass test reports as advised in the wider guide. Match safety glazing and thermal performance to the installation. Specify the controller, power supply, wiring and installation instructions as part of the order. Assess electromagnetic compatibility where the equipment can generate disturbance, subject to exclusions. For electrical equipment within scope, the importer must ensure easily understandable English instructions accompany it.

Worked duty example

Illustrative example, not a quote: Illustrative: 50 switchable privacy insulating glass units, subject to classification under 7008 00 81 00, invoiced at £36,000 free on board, with £6,000 of freight and insurance to the UK. The customs value is £42,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £42,000, so it is £8,400. 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

Privacy operation: connect each unit to the specified controller and supply, then check powered and unpowered appearance, patchy switching, residual haze and visible silhouettes against the approved sample.

Dimensions and wiring: compare sizes, thickness, cable exits and connector positions with the cutting list. Check cable protection and identify which controller serves each unit.

Seals and glass: examine edge seals, cable penetrations, moisture between panes, scratches, bubbles and separation around the privacy layer. Match the delivered glass construction to the supporting reports.

Packing and arrival: check upright support, separators, corner protection and secured cables. Record crate damage before unpacking and repeat operation checks on arrival. Use a product inspection brief covering both glass and switching.

What goes wrong

A sample may look private under factory lighting but reveal silhouettes in its intended room. Switching can become uneven, cable exits can foul the frame, and a substituted controller can produce different behaviour. Test the agreed glass and controller combination under representative lighting before approving production.

Damaged seals can cause misting between panes, while poorly supported crates can leave units cracked or chipped. Agree responsibility for controller faults, damaged cables and failed sealed units, including how replacements will match the original sizes and appearance.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For own-brand ranges, see sourcing for brands.