Adheseal Window Packers are colour-coded, horseshoe-shaped plastic shims for levelling and spacing window frames, door frames and construction panels around installed bolts or anchors. The open slot slides into place around a fixing, so installers can adjust a frame without completely removing the bolt.
Choose these packers when you need a consistent gap behind a fixing point during frame alignment, façade work or cladding installation. The range includes different thicknesses, widths and bucket quantities, allowing you to select the combination required by the detail rather than stacking unsuitable scraps.
Where window packers are used
- Window and door installation: levelling and spacing mechanically fixed frames before final tightening.
- Façade and cladding alignment: packing compatible brackets and panels to the specified setting-out dimension.
- Building joinery: correcting small installation gaps around bolted or anchored components.
Select the right size
Available variants include thicknesses from 1mm to 10mm and widths of 75mm, 90mm and 140mm; confirm the combination and quantity shown for your selection. The horseshoe opening is designed for use around fixings, not as a substitute for correctly specified glazing setting blocks.
Confirm load requirements, fixing design and packer placement with the relevant window or cladding system. These spacers do not replace structural support, waterproofing or the specified frame fasteners.
Window Packers Physical Properties
| Property | Value |
|---|---|
| Material Type | Rigid Polymer |
| Appearance | Slotted Horseshoe |
| Colour | Colour-coded by thickness |
| Compressive Strength | Non-deforming under normal load |
| Bed Thickness | 1 mm – 10 mm |
| Thickness Options | 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm |
| Substrate Compatibility | Window frames, Door frames, Cladding, Curtain walls, Joinery, Furniture |
| Moisture Resistance | Yes |
| Dimensional Stability | Yes |
| Shelf Life | Unlimited |
| Storage Conditions | Cool, dry area away from direct sunlight |