WEMNO Glazing Packers - 4mm - Grey
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Product Information
Full details
WEMNO 4mm Glazing Packers are essential tools for professional glaziers, window fitters, and DIY enthusiasts who need to level, align, and support window and door frames during installation. These high-density polypropylene spacers ensure frames remain square and true, effectively carrying the weight of heavy glass units for long-term structural integrity. While they are incredibly durable and resistant to environmental factors, users should note that these specific units are fixed at a 4mm thickness, which may require combining with other sizes for precise gaps larger or smaller than 4mm.
All features
| Colour | Grey |
|---|---|
| Brand | B&Q |
Extended Product Information
FAQs
Can these be used outdoors?
Yes, they are made from rot-proof and waterproof Polypropylene, making them ideal for exterior glazing and decking applications.
Are they compatible with timber frames?
Yes, they are suitable for use with uPVC, aluminium, and timber frames.
Will these packers compress under heavy glass?
No, they are specifically engineered for high-load bearing capacity and will resist compression under the weight of standard glazing units.
Can I stack multiple 4mm packers together?
Yes, you can stack them to achieve the necessary thickness for wider gaps.
Do these react with silicone sealants?
No, the material is chemically inert and resistant to sealants and common building chemicals.
Troubleshooting
Frame remains out of level after packing
Check the structural opening for significant deviations. You may need to stack a 4mm packer with a 1mm or 5mm variant to achieve the exact height required.
Packer slips out during installation
Apply a small bead of low-modulus silicone or contact adhesive to hold the packer in position while the frame is secured.
Pros and Cons
Pros
- Resistant to chemicals and moisture
- High compression strength for heavy glass
- Easy to identify with color-coded grey finish
- Multi-purpose usage beyond glazing
- Rot-proof for long-term installation stability
Cons
- Fixed thickness requires layering for adjustments
- Limited to 4mm increments if not used with other sizes
- Requires proper shimming technique to avoid frame bowing
Setup, Compatibility & Care
Compatibility:
These 4mm packers are universally compatible with major frame materials, including uPVC, aluminium, and timber. They work seamlessly with other sizes in the WEMNO range (such as the 1mm green or 5mm blue variants) if you need to build up a specific thickness that isn't a multiple of 4.
Setup Instructions:
- Check the opening for level and plumb using a spirit level.
- Identify the required gap between the frame and the structural wall.
- Insert the WEMNO packers at load-bearing points (usually near corners and mullions) to support the weight of the glazing unit.
- Ensure the packers are positioned so they do not interfere with drainage slots in the frame.
Care:
These packers require no maintenance. Once installed and sealed, they are designed to remain in situ for the life of the frame. Ensure they are kept in a dry storage area to prevent loss until they are needed on site.