Kiln dried sand for block paving
Updated: 21 October 2026
The bags on amazon.co.uk do not describe the same job. Some are kiln dried sand for block paving, some add a mineral and a weed sentence, and one is meant to harden after you wet it. Measure the joint, choose loose or curing, then check the bag weight against a coverage claim you can use. Prices and the seven listings sit on the [joint sand comparison](/hub/flooring-tools-and-accessories/joint-sand), captured on 19 October 2026. If the label already says it sets, read [kiln dried sand vs setting sand](/hub/flooring-tools-and-accessories/joint-sand/sub/joint-sand-kiln-dried-or-setting) first. A purchase through our links can earn a commission at no extra cost to you.
The bags on amazon.co.uk do not describe the same job. Some are kiln dried sand for block paving, some add a mineral and a weed sentence, and one is meant to harden after you wet it.
The bags on amazon.co.uk do not describe the same job. Some are kiln dried sand for block paving, some add a mineral and a weed sentence, and one is meant to harden after you wet it. Measure the joint, choose loose or curing, then check the bag weight against a coverage claim you can use. Prices and the seven listings sit on the joint sand comparison, captured on 19 October 2026. If the label already says it sets, read kiln dried sand vs setting sand first. A purchase through our links can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Type | Bag weight | Joint width | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Sika Sika setting sand, buff, 20 kg | Moisture-curing setting sand | 20 kg | 2–5 mm | 8.4 | about £21.99 | View offer |
| Best value |  Laeto Laeto kiln dried sand, 20 kg | Kiln-dried paving sand | 20 kg | Not stated | 8.2 | about £16.14 | View offer |
| Alternative |  Dansand Dansand No Grow kiln dried, 20 kg | Kiln-dried sand with a weed claim | 20 kg | Up to 5 mm | 7.8 | about £20.39 | View offer |
On this page
What joint you are filling
Block paving joints are narrow. Trade guidance treats about 2–5 mm, measured between the vertical faces and not across the chamfer, as the usual place for dried fine sand. Sika’s setting sand is specified at 2–5 mm wide and at least 25 mm deep. Dansand’s No Grow sheet is about 1–5 mm and at least 40 mm deep. A finger-width flag joint is a jointing compound, not a bag of paving sand. Measure three joints. A drive that has lost sand often mixes tight gaps and opened ones. Empty old sand, roots and grit before you judge the depth. If the blocks rock, or the edge restraint has moved, sand will not put that right.
Loose sand, mineral sand, or a sand that cures
Flexible block paving stays flexible because the joint is dried fine silica, not cement. Tobermore’s homeowner guide says the jointing sand should contain no cement or lime. You brush it in dry. That loose job is Laeto at £16.14 and UHL at £13.50. Laeto’s bullets talk about locking. Reviewers say it does not set. Mineral-additive sand is still brushed in like kiln-dried sand. Dansand No Grow, 10 kg at £12.32 and 20 kg at £20.39, and Easy Fix at £23.99, sit there. The product sheet describes a high-pH mineral. Use that high-pH line. It is a weed inhibitor, not a weedkiller. The limit is on does jointing sand stop weeds. Sika setting sand, buff, 20 kg, at £21.99, is specified to cure after a soak, for light vehicles, on joints of 2–5 mm. The polymeric dark grey 20 kg bag at £32.72 is sold as firm-setting, and the reviews both say it set and say it did not. The title says setting sand, not the Silicone or Liquid, Paste fields.
Bag weight and coverage
A 10 kg bag is a small top-up. A 19–20 kg bag is the usual pack. UHL is about £0.71 per kilo and Laeto about £0.81, but UHL is 5.0 from two reviews. Dansand’s 10 kg bag is about £1.23 per kilo, dearer than the 20 kg No Grow at £20.39. The polymeric bag is about £1.64 per kilo. A bullet on the 10 kg listing says twenty kilogram bags. Plan on the title weight. Coverage claims disagree, and this page will not average them. Dansand estimates about 5–10 m² from 20 kg. Laeto claims 20 m². Holcim’s July 2025 sheet, for a different 25 kg product, quotes about 7.6 m², 5.6 m² and 4.4 m² by block thickness, while Holcim’s product page says about 3–4 m². Neither is a yield for these ASINs. The brush-in is on how to brush sand into block paving.
What the listing must show
None of these seven listings prints a sieve curve. Tobermore’s professional guide cites BS 7533-101:2021 and a BS EN 12620 GF 85 0/1 grading: 2 mm 100% passing, 1 mm 85–99%, 0.5 mm 55–100%, and 0.063 mm 0–2%. Complies on a merchant bag does not transfer onto an amazon.co.uk listing that never prints the grading. A locking bullet is not a cure if reviewers say the sand stays loose. RED Dansand on Easy Fix and on the other 20 kg No Grow does not make them the same ASIN. Building sand will not flow into a 3 mm joint, and cement is what flexible block paving is meant to avoid. If the blocks are rocking, the edge has failed, or the base under a trafficked drive is unknown, stop buying sand.
Common questions
Is kiln-dried sand the right joint for concrete block paving?
For a flexible concrete block pavement, dried fine jointing sand with no cement or lime is the usual joint. Tobermore’s homeowner guide says that plainly. It locks the blocks by friction, and you top it up when rain or early traffic empties the joint. It is the wrong product once the joint is a wide flag gap, or once you need a moisture-curing sand and you can meet that sand’s width, depth and weather limits.
What joint width should I measure, and do I include the chamfer?
Measure the gap between the vertical faces. Do not include the chamfer, which makes the top of the joint look wider than the sand actually fills. Sika states 2–5 mm. Dansand No Grow states up to about 5 mm, and the sheet says about 1–5 mm with at least 40 mm of depth. Three joints on the drive will tell you more than one neat gap by the door.
Is a 10 kg Dansand bag better value than a 20 kg bag?
Not on price per kilo in this file. The 10 kg bag is £12.32, about £1.23 per kilo, and the 20 kg No Grow is £20.39. The small bag is the better buy only when you will not use 20 kg, for a short top-up of joints up to 5 mm. One bullet on the 10 kg listing also says twenty kilogram bags, so confirm the title weight before you order.
Why does one listing say 20 m² and another 5–10 m²?
They are different claims, not one measurement. Laeto states 20 m² for 20 kg. Dansand states about 5–10 m² for 20 kg, depending on joint width. Holcim publishes two different figures for its own 25 kg sand, a data-sheet range by block thickness and a product-page line of about 3–4 m². This page does not pick a winner among those claims.
When is this the wrong product and I need a resin compound?
When the joints are wide flag gaps rather than 2–5 mm block joints, or when the blocks rock and the edge restraint has failed. Resin mortar is a different product from these sands, including from Sika setting sand. If cars use a drive and you do not know the base, a contractor should see the pavement before you fill the joints.
Related pages
Sources
Public UK sources and amazon.co.uk listings, checked on 19 October 2026. Shelf prices and star lines are the figures in the display file.
- Pavingexpert dry sand jointing (retrieved 19 October 2026)
- Pavingexpert loose fill (retrieved 19 October 2026)
- Interpave concrete block paving (retrieved 19 October 2026)
- Tobermore block paving installation guide (retrieved 19 October 2026)
- Holcim UK kiln-dried sand sheet, July 2025 (retrieved 19 October 2026)
- Sika UK setting sand how-to (retrieved 19 October 2026)
- HSE indg463 silica dust (retrieved 19 October 2026)
- Dansand joint filling sand product sheet (retrieved 19 October 2026)