Professional U-Channel Packers
Precision-engineered U-packers designed for frame protection and precise spacing in window and door installations. Perfect for protecting frame channels and ensuring consistent glazing gaps.
🛡️ Frame Protection
Channel edge guard
📐 Precise Fit
Frame-matched profiles
🔄 Reusable
Durable construction
Frame Profile Compatibility
🪟 uPVC → Standard profiles
🥈 Aluminium → Metal frames
🌲 Timber → Wood frames
📏 Custom → Made to order
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Mixed U Packers – 5mm Green, 3mm Red & 2mm Yellow | Polypropylene Plastic Shims for Windows, Doors & Leveling
Regular price From £8.35 GBPRegular priceUnit price perSale price From £8.35 GBP🚚 Next day delivery -
U Packers 2mm Yellow - Polypropylene Plastic Shims for Windows, Doors & Leveling
Regular price From £8.35 GBPRegular priceUnit price perSale price From £8.35 GBP🚚 Next day delivery -
U Packers 3mm Red - Polypropylene Plastic Shims for Windows, Doors & Leveling
Regular price From £8.39 GBPRegular priceUnit price perSale price From £8.39 GBP🚚 Next day delivery -
U Packers 5mm Green - Polypropylene Plastic Shims for Windows, Doors & Leveling
Regular price From £9.44 GBPRegular priceUnit price perSale price From £9.44 GBP🚚 Next day delivery
U-Packer Installation & Selection Guide
🔧 Installation Process
Step-by-step guide for proper U-packer installation in frame channels.
- Measure channel: Check frame profile dimensions
- Select size: Choose packer matching channel width
- Position packer: Insert into frame channel
- Secure glazing: Install glass against packer
- Verify spacing: Check consistent gap around perimeter
📏 Size Selection Guide
Choose the correct U-packer size for your frame profile and glazing requirements.
- 10-15mm: Standard uPVC windows
- 15-20mm: Large windows, bi-folds
- 20-25mm: Commercial glazing
- 25mm+: Structural applications
💡 Pro Tip: Always use packers that match your frame profile exactly. Incorrect sizing can cause stress points and compromise weatherproofing.



