Best paving jointing compound
Updated: October 2026
The best paving jointing compound in this amazon.co.uk set is one bag, and only for narrow block joints. Sika setting sand, buff, 20 kg, is the top pick and the best value. It is the wrong buy for a wide flag joint, for porcelain, and for anyone who needed a ready-mixed tub. You want a named listing and a clear reason to leave the others on the shelf. Prices and review counts sit on the [paving joint compound comparison](/hub/flooring-tools-and-accessories/paving-joint-compound). Peter F. did not lab-test these packs. If you buy through our links, we may earn a commission at no extra cost to you.
The best paving jointing compound in this amazon.co.uk set is one bag, and only for narrow block joints. Sika setting sand, buff, 20 kg, is the top pick and the best value.
The best paving jointing compound in this amazon.co.uk set is one bag, and only for narrow block joints. Sika setting sand, buff, 20 kg, is the top pick and the best value. It is the wrong buy for a wide flag joint, for porcelain, and for anyone who needed a ready-mixed tub. You want a named listing and a clear reason to leave the others on the shelf. Prices and review counts sit on the paving joint compound comparison. Peter F. did not lab-test these packs. If you buy through our links, we may earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Type | Stated joint width | Sets hard | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Bostik Bostik all weather, basalt, 15 kg | Ready-mixed brush-in compound | 5–30 mm | Highlight says yes. One review still found it crumbly. | 8.8 | about £39.35 | View offer |
 Sika Sika setting sand, buff, 20 kg | Moisture-curing setting sand | 2–5 mm | Claimed. Most reviews say it set. Some washed out. | 8.4 | about £21.99 | View offer | |
 Dansand Dansand No Grow polymeric, dark, 20 kg | Polymeric firm-setting sand | Not stated | Claimed. Reviews both set overnight and never set. | 8.0 | about £32.72 | View offer |
On this page
Top pick for narrow block joints
Sika setting sand, buff, 20 kg (B01JYXFRFG) is £21.99, with 4.2 from 2,591 reviews. The listing says it works best on joints of 2–5 mm and for light vehicles only. The January 2026 sheet asks for at least 25 mm of depth, a dry sweep, surplus brushed off the face, then a spray rather than a jet. It bars laying at +5 °C or below or when rain is imminent. A jet, or rain on a slope, is where reviews describe washout.
That is why it is the top pick and the best value: a stated millimetre window, the only four-figure UK review count, and the lowest price per kilogram among the full bags. A 10 mm flag gap is outside 2–5 mm. How to measure before you trust a colour is the paving jointing compound buying guide.
Why the higher star rating is not the pick
Bostik all weather, basalt, 15 kg (B0F2THZPTT) is £39.35 with 4.4 from 46 reviews. A 4.4 is higher than 4.2, and 46 reviews are not 2,591. The bullets say permeable joints of 5–30 mm, ready mixed, with no mixing. That is a wet brush-in for a wider patio joint, not the narrow block job.
TDS02249, 25 April 2025, says the compound is not for block paving, driveways or constant immersion, and not for V-shaped joints. The amazon bullets mention driveways anyway. Follow the sheet. One UK review says an opened tub had gone solid before the next section. Another found the joint crumbly. It is the reviewed brush-in for 5–30 mm on a draining patio, not the top pick and not the best value next to £21.99 for 20 kg.
Packs the comparison cannot crown
Dansand No Grow, dark, 20 kg (B09SH3FTC6) is £32.72 with 4.0 from 96 reviews. The listing gives no joint width, and the reviews both say it set overnight and say it never set. Several say weeds came back. That split file is not a safe second choice.
Rock-Tite blanched almond, 15 kg, is £34.99 with no reviews and no stated width. Dansand Kerama grey, 15 kg, is £39.99, states joints up to 10 mm and 5–10 m², and has no reviews. Mainbrick Easy Joint, 15 kg, is £41.80 with 5.0 from one review and no text. Joint-it Simple, 12.5 kg, is £155.58, with 3.4 from nine United States reviews. NVBFOL at £7.99 is a miniature paste of about 100 g in the only review. Porcelain is a separate surface on porcelain patio jointing compound.
Names you will see that are not in this table
Search results often name Sika FastFix, Geo-Fix, Glean and EASYJoint. FastFix charcoal (B085WJXM7W) has 4.3 from 9,827 reviews and is not a row here. Its price was not captured, so this page will not invent one. Geo-Fix is discussed on trade guides. Its price was not captured either.
Sika’s surface guide keeps setting sand for block paving, FastFix for stone and concrete, and FlowFix for porcelain. Using the buff sand where the guide names a different product repeats that mistake. If the units are loose, do not use jointing compound to glue a rocking slab down.
Common questions
Which product in this comparison is the top pick, and for whom?
Sika setting sand, buff, 20 kg (B01JYXFRFG), at £21.99 with 4.2 from 2,591 reviews. It is the top pick and the best value for block joints of 2–5 mm that you can sweep in dry and mist. Skip it for wider joints, for porcelain, and for a ready-mixed brush-in.
Is Bostik the better buy because 4.4 is higher than 4.2?
No. Bostik’s 4.4 comes from 46 reviews, against 2,591 on the Sika bag. The products also fit different joints: Bostik’s sheet is 5–30 mm and excludes block paving and driveways, while Sika’s listing is 2–5 mm. A higher star on the smaller sample does not move the top pick. Choose Bostik only when the joint, the drainage and the sheet all allow a wet brush-in.
Why is the cheapest full bag also the best value?
Sika’s 20 kg bag is £21.99, about £1.10 a kilogram, and it is the only pack here with a review count in the thousands plus a stated 2–5 mm window. The £7.99 paste is about 100 g in the only review, not a patio bag. A low price per kilo only counts when the bag is a real paving quantity and the joint width is on the page.
Should I buy Sika FastFix instead?
Not from this table. FastFix charcoal has a large amazon.co.uk review count, 4.3 from 9,827, and it is outside the ten ASINs compared here. Its price was not captured, so it cannot be ranked against £21.99 or £39.35. Sika’s surface guide treats FastFix as the stone and concrete compound, not as a substitute for setting sand on 2–5 mm block joints. Leave it unranked.
Is Dansand No Grow a safe second choice?
Not on this file. It is £32.72 for 20 kg, with 4.0 from 96 reviews, which looks like a middle option under Bostik. The listing states no joint width in millimetres, and the reviews both say the sand set overnight and say it never set. Weeds are reported as well. A split cure story is the reason not to crown it, even though the bag is cheaper than the Bostik tub.
Related pages
Sources
Public UK sheets and guidance, plus the amazon.co.uk listing lines kept for these ten products. This is not a laboratory test.
- Sika Setting Sand product data sheet, January 2026 (retrieved October 2026)
- Bostik UK TDS02249, 25 April 2025 (retrieved October 2026)
- Sika UK surface guide: match the jointing compound (retrieved October 2026)
- HSE: dry sweeping and construction dust (retrieved October 2026)
- BS 7533-103:2026, permeable pavement design (retrieved October 2026)
- Marshalls: how to lay a porcelain patio (retrieved October 2026)
- Pavingexpert: pointing (retrieved October 2026)
- Joint-it Simple, maker page (retrieved October 2026)