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Best paving joint mortar for the job in front of you

Updated: October 2026

There is no single best paving joint mortar in this amazon.co.uk set. A 300 ml repair tube, a pre-mixed cement tub and a brush-in compound are doing different work. This page names one listing for a short repair, one for a mix-it bag and one for a brush-in patio. Cards and prices are on the [paving joint mortar comparison](/hub/flooring-tools-and-accessories/paving-joint-mortar). Joint width is the [buying guide](/hub/flooring-tools-and-accessories/paving-joint-mortar/sub/paving-joint-mortar-buying-guide). The order of work is [how to point patio slabs](/hub/flooring-tools-and-accessories/paving-joint-mortar/sub/paving-joint-mortar-how-to-point). Rigid joint versus permeable tub is [jointing compound vs sand and cement](/hub/flooring-tools-and-accessories/paving-joint-mortar/sub/paving-joint-mortar-vs-sand-and-cement).

There is no single best paving joint mortar in this amazon.co.uk set. A 300 ml repair tube, a pre-mixed cement tub and a brush-in compound are doing different work.

Our top picks

Bostik Bostik Cementone mortar, 10 kg

Best overall

Bostik Bostik Cementone mortar, 10 kg
9.0/10about £14.99
View offer
Bostik Bostik All Weather jointing compound, 15 kg

Alternative

Bostik Bostik All Weather jointing compound, 15 kg
8.8/10about £39.35
View offer
Siroflex SX Siroflex mortar repair, 300 ml

Best value

Siroflex SX Siroflex mortar repair, 300 ml
8.4/10about £7.96
View offer
On this page
  1. 1.Best for a few joints, not a whole patio
  2. 2.Best pre-mixed bag in this set
  3. 3.Best brush-in when the joint is wide enough
  4. 4.What to skip

Best for a few joints, not a whole patio

For a short run of joints, the SX Siroflex cartridge is the sensible buy. It is 300 ml of buff paste. You cut the seal, fit the V nozzle and push it with a gun the box does not include. The jobs reviewers describe are small: about two and a half slabs in one account, about six in another. It is a poor buy if the patio is the whole afternoon. A measured 5–30 mm gap on a draining patio belongs with the brush-in, not with a cement bag.

Best pre-mixed bag in this set

The top pick for a general mix-it point is Bostik Cementone, a pre-mixed blend you wet in the tub. The listing states water resistance without a joint in millimetres. Some tubs arrive cracked. Mix a little, with very little water, so the rest of the powder stays usable. Laeto Easy Mix is a fair bulk bag if you are laying as well as pointing and you can lift 20 kg. The Home Packs are 1:6 mixes that reviews say arrive as separate bags. Skip them when the label you wanted was a ready blend.
Bostik Bostik Cementone mortar, 10 kg

Testsieger

Bostik Bostik Cementone mortar, 10 kg
9.0/10about £14.99
View offer

Best brush-in when the joint is wide enough

When the joint is wide enough to state, Bostik All Weather is the brush-in to take seriously. It is ready to use with no mixing. Walk-on time on the UK page is about 24 hours. One buyer found a resealed tub solid later. Buy it for a path or patio inside the stated width and depth. Do not buy it for a drive on the strength of the amazon bullet. Dansand Kerama has no UK star line and belongs on the porcelain page, not in a general best-mortar sentence.

What to skip

Skip every product here if the slabs rock or sound hollow. Lift, re-bed, then point. A butt joint near 2 mm is the other hard skip. Bostik starts at 5 mm, and the Kerama and Joint-it maker pages start at 3 mm. None of these scores is a lab test of weeds, frost or jet washing. Stars describe mixing, colour and delivery. They do not fill in a joint width the listing left blank.

Common questions

Which listing is the sensible small repair?
The SX Siroflex 300 ml cartridge at £7.96, with 4.2 from 1,388 reviews. It is a ready buff paste for dry weather above 5°C, and the gun is extra. Reviewers describe a stiff tube and only a few slabs. If the job is bigger, move to Jetcem's 6 kg bag or Cementone's 10 kg tub, and accept that neither states a joint width.
Which pre-mixed bag has the strongest review count?
Bostik Cementone, at 4.5 from 5,459 reviews, ahead of Jetcem's 3,628 and Laeto's 320. It is a 10 kg tub at £14.99 for pointing and patching, not a stated 5–30 mm compound. The count is why it is the top pick for a general mix. It does not prove a colour match, and several buyers found the grey too light.
When is the brush-in tub the better buy than Cementone?
Choose Bostik All Weather when you have measured 5–30 mm joints at least 25 mm deep on a path or patio whose base drains. Cementone is the better buy when you want a rigid cement point and you would rather trust 5,459 reviews than 46. The compound is the wrong swap on a driveway if you follow Bostik's own sheet, which excludes drives even though the listing mentions them.
Why is Joint-it Simple at £155.58 not the default top pick?
The listing is 3.4 from 9 reviews, and the three texts in the file are from the United States. It states no joint width, one reviewer said it was not permeable, and one tub arrived hard. A high price is not a wider joint. Use it only after the live UK page matches the maker's 3 mm by 25 mm rule on a permeable base.
What should you skip if the slabs rock?
Skip the filler. A rocking or hollow flag needs the bed repaired before mortar or compound goes in the joint. Pointing it now hides the movement until the joint cracks. The cartridge, the cement bags and the brush-in tubs all fail the same way on a loose slab.
Is Laeto's 4.6 a better mortar than Cementone's 4.5?
Laeto's 4.6 is 320 reviews on a 20 kg pre-blend that names patio bedding. Cementone's 4.5 is 5,459 reviews on a 10 kg pointing tub. The higher star line is real, the sample is smaller, and some Laeto buyers call the mix sand-heavy. They are different packs. Laeto is not the winner because the number is 0.1 higher.
Who should not buy the Bostik tub for a drive?
Anyone pointing a driveway or block paving should leave this Basalt tub. The UK sheet says it is not for driveways or block paving, even though the amazon.co.uk bullets mention driveways. It also wants a permeable bed at least 25 mm deep. A rigid cement point is a different joint, with its own limits on a front garden.

Related pages

Paving joint mortar for porcelain

Paving joint mortar

Paving joint mortar buying guide: width, depth and base

How to point patio slabs with damp mortar in batches

Jointing compound vs sand and cement on a single patio

Sources

Public sources used for this comparison, with the amazon.co.uk listings read on 20 October 2026.

  1. Bostik UK TDS02249, All Weather jointing compound (retrieved 20 October 2026)
  2. Joint-it Simple (retrieved 20 October 2026)
  3. Dansand Kerama (retrieved 20 October 2026)
  4. Marshalls concrete paving installation guidelines (retrieved 20 October 2026)
  5. England: permitted development technical guidance (retrieved 20 October 2026)
  6. BSI on BS 7533-101 (retrieved 20 October 2026)
  7. HSE: cement (retrieved 20 October 2026)
  8. HSE: chasing concrete and raking mortar (retrieved 20 October 2026)