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UK Trade & DIY Supplies
Glazing essentials. Ready for your next job.
UK-made packers, bridge packers and drainage caps — plus fixings, tools and workwear for trade and DIY.
Damp proofing: find the right treatment
For the van and the job
Packers & glazing essentials
Choose your packer width and thickness, then pick up the tools and finishing accessories for the job.
28mm Glazing Packers
Choose 1–6mm thicknesses or a mixed pack.
From £7.25
32mm Glazing Packers
32mm wide flat shims. Choose your thickness and quantity.
From £8.81
24mm Glazing Packers
24mm wide flat shims in single or mixed thicknesses.
From £6.29
24mm Bridge Packers
Check the bridge shape and dimensions against your frame.
From £7.61
Glazing Shovels
Plastic paddles for positioning glass during packing.
From £4.98
Drain Hole Covers
Replacement uPVC weep caps. Check your frame profile.
From £5.24
Why GSD
Trade supplies, without the trade counter.
Own-brand glazing consumables made in the UK, alongside the workwear brands your site already specifies.
Browse all products-
Made in the UK
Our glazing packers, bridge packers and weep caps are manufactured here and made from recyclable material.
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Colour-coded by thickness
1mm green, 2mm black, 3mm white, 4mm grey, 5mm blue, 6mm red — pick the right shim on site without measuring.
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Brands you already specify
Portwest, Snickers, Blaklader, Helly Hansen and Carhartt workwear, stocked in depth.
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Bulk packs or singles
Packers from 60 up to 10,000 mixed. Buy a bag for the van or a pallet for the contract.
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Trade prices for everyone
No account, no login, no minimum order. The price you see is the trade price.
Brands we stock
- Portwest
- Snickers
- Blaklader
- Helly Hansen
- Carhartt
Flat Packers or Bridge Packers?
Both go into the same window — they just do different jobs. Here is the quick answer.
Most PopularFlat Glazing PackersLevelling and packing
Bridge PackersLoad bearing and drainage
Levels and packs the frame sides
Carries the glass weight on the sill
Leaves the drainage channel clear
Thickness
1–6mm colour-coded
5mm fixed height
Widths available
24–32mm
15–32mm
Tips, Guides & Industry News
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Frequently Asked Questions
Still got questions? Get in touch
Do you offer free delivery?
Yes — free UK delivery is available on many qualifying orders over £50. Standard delivery is available on smaller orders for a flat fee where applicable. Supplier and destination exceptions apply; all delivery charges are shown at checkout. See our delivery policy.
Can I get next-day delivery?
Next-working-day delivery is available on selected stocked items ordered before 3pm Monday to Friday, excluding bank holidays. Manufacturer-direct brands take 5–8 working days; other brands normally arrive within 3 working days, with occasional additional delays of 1–2 working days. Check the full brand list and delivery details, or contact us before ordering if your order is urgent.
What is your returns policy?
We accept returns within 30 days of purchase on unused, unopened items. Contact us to arrange a return.
Do I need a trade account to buy?
No — all customers see trade pricing. No account or login required to purchase.