Independent comparisons. We may earn from shop links. More info

Best glazing packers for one window

Updated: 23 October 2026

You want one listing to open for a single uPVC window or door, and a clear list of packs to leave in the basket. Best on this search is often a star sort, which pulls kiln-dried wood shims and rubber furniture wedges into a glazing result. In this comparison the top pick for one domestic opening is the 42-piece flat pack, if you can check the thickness. The best value is the 72-piece pack, if you want more pieces and you will ignore the dye. Both are on the [shims comparison](/hub/diy-supplies/shims). Prices are amazon.co.uk shelf prices in GBP. A qualifying purchase can earn a commission at no extra cost to you. This is not a lab test.

You want one listing to open for a single uPVC window or door, and a clear list of packs to leave in the basket.

Our top picks

EVOGES EVOGES flat glazing packers, 42 mixed

Best overall

EVOGES EVOGES flat glazing packers, 42 mixed
8.8/10about £6.99
View offer
EETU EETU horseshoe shims, 200 mixed, Broadfix

Alternative

EETU EETU horseshoe shims, 200 mixed, Broadfix
8.4/10about £18.97
View offer
HuangXinyu HuangXinyu flat glazing packers, 72

Best value

HuangXinyu HuangXinyu flat glazing packers, 72
8.4/10about £5.99
View offer
On this page
  1. 1.Best for one opening
  2. 2.Better piece count for the same shape
  3. 3.When neither flat pack is the one
  4. 4.The star count to ignore

Best for one opening

The EVOGES pack, ASIN B0DJ1976Y9, is 42 flat plastic pieces, 28 × 100 mm, seven each from 1 mm to 6 mm, at about £6.99. The amazon.co.uk line is 4.7 from 347 reviews, the largest flat-packer file in the set. UK reviews describe a double-glazed window, glazing panels, a shed base and decking, and pieces that snap cleanly. That is why it is the top pick for a first flat-packer job, not a prize from a test house. Seven of one thickness can disappear if you pack both jambs, the cill and the head. One UK job still needed build-up bars because the window was the wrong size. There is no slot, so a screw already proud of the reveal wants a horseshoe, not this flat.

Better piece count for the same shape

The HuangXinyu pack, ASIN B0DP1XWJ34, is 72 polypropylene flats, 100 × 28 mm, twelve of each thickness from 1 mm to 6 mm, at about £5.99. The star line is 4.7 from 74 reviews. UK texts mention doors, windows, heel-and-toe and packing a floor. On spare pieces of the thickness you need, this is the best value in the set if you will check the size. One buyer found pieces that were not the same depth. Another said red was used for both 4 mm and 6 mm. Flat catalogues often run green for 1 mm through red for 6 mm. This bag does not promise that map. Read the moulded size.
EVOGES EVOGES flat glazing packers, 42 mixed

Testsieger

EVOGES EVOGES flat glazing packers, 42 mixed
8.8/10about £6.99
View offer

When neither flat pack is the one

Buy the EETU horseshoe bag, ASIN B0768L6TTT, when the job is studs, battens or door linings and a screw is already in the gap. It is 200 mixed U shims, 55 × 43 mm, 1 mm to 6 mm, made by BROADFIX, at about £18.97, with 4.7 from 182 reviews on linings, studs and battens. Some pieces arrive short, and the barbs can grip hard. The listing states no load, so do not paste a 25 kN line from another Broadfix page onto this bag. Wickes lists a Broadfix flat pack of 120 at about £13, and Screwfix lists 225 medium flats at about £15 to £16. Those are merchant packs, not rows in this amazon set. Skip hinge slips on a fire-resisting door, and skip rubber wedges for glazing.

The star count to ignore

Nelson wood shims, ASIN B07C38PL2N, show 4.7 from 2,418 reviews at about £9.99 for 24 kiln-dried 8 inch wedges. A star sort would call that the best packer. It is not. Only three of 47 saved texts are headed United Kingdom, and one levelled an IKEA Pax wardrobe. Wood is a dry, visible taper. Leaving it in a damp cavity is the argument on plastic packers or wooden shims. Fizzix, 100 pieces at about £5.79, does not state size or material, and one review calls the pieces tapered with a slot. It is not the first flat to open. Onspeshow and Buwoek have no star line, so they get no best sentence.

Common questions

Is the 42-piece pack enough?
It can finish one domestic opening, and it can run short of the thickness you use most. Seven pieces of 5 mm disappear if you pack both sides, the cill and the head. One review still needed build-up bars because the unit did not fit the hole. If you expect to use a lot of one size, the 72-piece pack is the safer count, provided you check each piece.
Is the cheaper 72-piece pack the better buy?
It is the better buy when you want more pieces for less money and you will not trust the colour. HuangXinyu is about £5.99 for 72 polypropylene flats, twelve of each thickness, with 4.7 from 74 reviews. That is the best value in this set. A review found uneven pieces, and red was used for both 4 mm and 6 mm. Read the moulded size.
Why not the wood shim with thousands of reviews?
Because the reviews are not a UK window test. Nelson is 4.7 from 2,418 at about £9.99, and only three of 47 saved texts are headed United Kingdom. One of those levelled a wardrobe. Kiln-dried wood is reasonable on a dry job you can still see. It can swell if you seal it into a wet reveal. The star line does not change the material.
When is the horseshoe bag the right best?
When a screw is already in the gap. The EETU bag is 200 U shims, 55 × 43 mm, mixed 1–6 mm, made by BROADFIX, at about £18.97, with 4.7 from 182 reviews on linings, studs and battens. It is the right pack for that job and the wrong best glazing packer for a sealed unit. Some pieces arrive short, and the listing states no load.
Are Broadfix packs in this comparison?
The horseshoe bag is made by BROADFIX and sold under the EETU brand line. The flat Broadfix boxes at Wickes, 120 pieces at about £13, and Screwfix, 225 pieces at about £15 to £16, are merchant packs, not rows in this amazon set. Use them for a trade colour code and a bigger count. Do not treat that price as a discount on the EVOGES listing.
Who should skip both flat packs?
Skip them if the only fault is a rubbing hinge, if you need a slot around a screw, or if you are levelling a table. Also skip both flats if the opening is badly out of square, the lintel is damaged, or the unit is too heavy to handle. Packers do not repair the wall. That is the point where a fitter should take the job.

Related pages

Which glazing packers and shims to buy

How to pack a window frame

Shims

Furniture levelling wedges for rocking tables and chairs

Plastic packers or wooden shims for windows and doors

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Scores dated 22 October 2026. Updated 23 October 2026.

  1. BPF Online — How to choose the right plastic packer (retrieved 22 October 2026)
  2. Fixfast — Plastic packing shims data sheet (retrieved 22 October 2026)
  3. Glazpart — Glazing accessories (retrieved 22 October 2026)
  4. NBS — BS 6262-1:2017 (retrieved 22 October 2026)
  5. Fix Direct — how glazing packers are used (retrieved 22 October 2026)
  6. SAJE — How to toe and heel (retrieved 22 October 2026)
  7. Wickes — fixing distances (retrieved 22 October 2026)
  8. NHBC — Section 5, first fix operations (retrieved 22 October 2026)
  9. Approved Document 7 (retrieved 22 October 2026)