Flat Glazing Packers

Precision-Level Shims for Professional Window & Glass Installation (1–6 mm)

Flat glazing packers provide stable, accurate support when setting glass units, aligning frames, or levelling window and door assemblies. Made from tough, non-compressible plastic, they hold their shape under load and help maintain correct sightlines without stressing seals or restricting drainage pathways.

Available in a full range of 1–6 mm thicknesses, each size follows a clear colour system so you can select the right packer instantly. Choose from single-thickness packs for repetitive jobs or assorted packs when you need multiple sizes on hand. All items are held in UK stock, dispatched quickly, and supplied with VAT invoices.