The best paving joint compounds, compared.
Top pick: Mainbrick Easy Joint, 15 kg Best value: Sika setting sand, buff, 20 kg – Best value on the same bag. A miniature £7.99 tub and a 5.0 from one review do not undercut that price per kilogram. Updated October 2026.
A paving joint compound is the prepared filler you brush into patio, sett or block-paving gaps so the joint stays put better than loose sand. On amazon.co.uk most of these buys are a patio top-up or a finished path. The split that matters is width: about 2–5 mm for moisture-curing setting sand, and about 5 mm and wider for a ready-mixed brush-in. A 5.0 from one review does not outrank it. For the tub, the UK technical sheet decides driveway use, not the amazon bullet. The [paving joint compound buying guide](/hub/flooring-tools-and-accessories/paving-joint-compound/sub/paving-joint-compound-buying-guide) sets the width, the surface and the exclusions. The sheet from wants at least 25 mm.
A paving joint compound is the prepared filler you brush into patio, sett or block-paving gaps so the joint stays put better than loose sand. On amazon.co.uk most of these buys are a patio top-up or a finished path.
36 products checked · 64 hrs invested · +21,400 readers
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Personal buying guide
Question 1 of 2
How wide is the narrowest joint?
Mainbrick Easy Joint is a 15 kg ready-mixed filler at £41.80, with compatible material listed as stone and bullets mentioning permeability plus frost and salt resistance. The star line shows 5.0 from one review, but the listing has no review text, so that score is not evidence you can read. No joint width in millimetres appears anywhere on the page, which is awkward when you are comparing against Sika or Bostik width bands. Weed volunteers are said to be discouraged on the listing without UK narratives to test that. For a full patio you are buying on brand claims alone at a higher per-kilogram price than the reviewed Sika bag. It may suit stone paths if your gaps match what Mainbrick expects, but measure first.
Pros
Cons
Best for: Small stone paving repairs when you already know your joint size fits a generic filler and accept thin review proof.
Less suitable: Block-paving refills, porcelain, or anyone who needs a stated width and hundreds of reviews.
Specifications
Common questions
What joint size does this Easy Joint listing state?
None. The bullets say water and air permeability, frost and salt resistance, and no weed volunteers.
What surface is named?
The compatible-material field says stone. A listing question asks about all paving stones, with no answer text.
Is the 5.0 rating backed by a written review?
The star line says 5.0 from 1 review. The listing has no review text.
Bostik All Weather basalt is a 15 kg ready-mixed paste for permeable joints from 5 mm up to 30 mm, brushed in without mixing on site. The star line is 4.4 from 46 UK ratings, a modest but readable sample for a tub product. Writers who match the width often describe a neat finish on patios and paths, while one UK review found the opened tub had gone solid before the next section. The UK technical sheet for this family excludes block paving and driveways even though the amazon bullets mention driveways, so read that sheet before you treat a car lane. One review still describes a crumbly joint after application. At £39.35 it costs more per kilogram than the Sika setting sand, but it covers a different joint width band.
Pros
Cons
Best for: Patios and paths with 5–30 mm joints on a free-draining base when you accept the manufacturer exclusions on driveways.
Less suitable: Block paving refills, constant vehicle loading, or jobs where the base stays wet.
Specifications
Common questions
What joint width does the Bostik listing state?
The bullets say permeable joints of 5 mm to 30 mm, for paving, patios and driveways.
Does it need mixing?
No. The listing says it is ready to use straight from the tub, with no mixing.
What happened when a reviewer resealed the tub?
One UK review says the opened tub had gone solid before the next section of the job.
Sika buff setting sand is a 20 kg bag for 2–5 mm block-paving joints, swept in dry and then soaked with a fine mist rather than a hose jet. Across 2,591 amazon.co.uk ratings it sits at 4.2, which is the only four-figure sample in this set and makes it the top pick here. Reviewers who follow the dry-brush-then-mist routine often describe a hard joint after a day or two, though full cure can take much longer on the manufacturer sheet. The same texts also report washout when the joint was still open to rain or when too much water was used at once. Weeds can still appear on the surface even when the sand has set. At £21.99 for 20 kg it is also the best value among full patio bags in this comparison.
Pros
Cons
Best for: Block paving with 2–5 mm joints when you can brush in dry sand and mist gently, not pressure-wash, until cured.
Less suitable: Wide patio gaps, porcelain slabs, or any joint where rain or a jet can reach unset material.
Specifications
Common questions
What joint width does this Sika listing state?
The bullets say it works best on joints between 2 and 5 mm, and for light vehicular traffic only.
Does the listing say the sand sets?
Yes. It cures in water to a hard finish and was previously known as Sika Setting Sand. Reviews describe a fine mist from a hose or a watering-can rose, not a jet.
Can it be used on indoor floors?
The bullets include indoor stone floors. The listing also asks the question, and it has no answer text.
Dansand No Grow dark grey is a 20 kg polymeric firm-setting sand at £32.72, with a 4.0 star line from 96 reviews. The listing promises a hard finish and weed resistance from high-pH minerals, but it does not state a joint width in millimetres, which makes it harder to match against a measured gap. Review texts split sharply: some say a gentle spray left the joint hard overnight, while others say it never set and washed out of the joints. Several writers also report weeds returning despite the bag claim. That mixed cure feedback is why reviews that disagree on setting cost points. It suits paths and driveways on the amazon page, yet you still need to confirm width and drainage yourself.
Pros
Cons
Best for: A dark joint on block or slab paving when you have measured the gap elsewhere and can test a small area first.
Less suitable: Anyone who needs a printed width range, or a joint that must set before the next rain shower.
Specifications
Common questions
Does this Dansand listing state a joint width?
No millimetre width is given. The bullets say it suits all paving types, including blocks, setts and slabs.
Do the reviews say it sets?
They split. Some say it set hard overnight after a gentle spray. Others say it never set and came out of the joints.
What weed claim is on the bag listing?
It describes kiln-dried sand plus minerals with a high pH, said to stop seeds germinating. Several reviews say weeds came back.
Joint-it Simple dark grey is a 12.5 kg ready-mixed paste listed for porcelain at £155.58, far above every other bag in this comparison. The star line reads 3.4 from nine ratings, but the written reviews on the listing are marked United States, so they are weak UK evidence. Coverage is quoted in square feet in the bullets without a millimetre joint width, which complicates metric planning. The manufacturer site for this family asks for a permeable base and minimum joint dimensions, yet this amazon page does not repeat those limits clearly. At this price you are paying a premium for a small tub with mixed credibility. Unless you already use Joint-it elsewhere, the reviewed mid-price tubs or Sika sand offer clearer UK feedback.
Pros
Cons
Best for: Porcelain or flagstone when you already know Joint-it Simple and accept US-only review text.
Less suitable: Budget patios, block paving, or anyone who needs UK review proof at a normal bag price.
Specifications
Common questions
Are the written reviews from the UK?
No. The three review texts on the listing are marked Reviewed in the United States. The star line is 3.4 from 9.
What coverage does the listing claim?
The bullets say the 28-pound bucket covers approximately 100 square feet. There is no square-metre figure and no joint width in millimetres.
What surface does the listing name?
Compatible material and the surface recommendation both say porcelain. The bullets also name pavers, flagstones and slabs.
NVBFOL beige grout paste is listed at £7.99 with a weight field of one gram and a 3.0 star line from a single UK review. That reviewer describes a mini plastic tub of about one hundred grams, not a patio-sized bag, which matches how misleading the listing weight looks. Bullets still name patios, pathways and outdoor porcelain, so the marketing overshoots the pack you receive. The model number in the technical block does not look like a finished product code, and included components say no. This is a tiny repair paste for a chip or a few millimetres of gap, not a substitute for a 15–20 kg jointing compound. Buy it only when the job size is literally pocket-scale and you have confirmed the delivery size on the product page photos.
Pros
Cons
Best for: A tiny beige touch-up on a tile or paving chip when you know you are buying a mini tub.
Less suitable: Whole patios, driveways, or any job that needs kilograms of compound.
Specifications
Common questions
How much product did the reviewer receive?
The only UK review says a mini plastic tub of about 100 grams, not a patio bag. The listing weight is 1 g.
Where does the listing say it can be used?
Bullets name patios, pathways, tiled floors, showers, kitchens, bathrooms and outdoor paving, including porcelain and concrete.
Does the listing say how long it takes to dry?
It asks the question. The listing has no answer and no drying time.
Rock-Tite blanched almond is a 15 kg polymer-modified cement powder sold as a brush-in grout for porcelain and natural stone. This amazon.co.uk listing carries no star line and no review text on the listing, so every performance claim rests on the bullets and material field. The page names porcelain, patio slabs and block paving but does not give a joint width in millimetres, which makes quantity planning guesswork. At £34.99 it sits in the mid band against other 15 kg bags here. The form is dry powder with no mixing stated beyond brushing in, and weed and ant resistance is claimed without UK review backup. Treat it as an unproven colour match until you have a written sample or a small trial bay.
Pros
Cons
Best for: A light-coloured porcelain or stone patio when you will trial one area first and accept listing-only evidence.
Less suitable: Block-paving refills, driveways, or anyone who needs a stated width and a large review sample.
Specifications
Common questions
What is this Rock-Tite bag made of, on the listing?
The material field says mineral aggregates, polymer-modified cement and sand. The form is powder.
Does the listing state a joint width?
No. It names porcelain, natural stone, patio slabs and block paving, and it does not give a width in millimetres.
Are there reviews?
The listing has no star line and no review text.
Dansand Kerama grey is a 15 kg brush-in product aimed at ceramic and porcelain tiles with joints up to 10 mm and tiles about 20–30 mm thick. The listing claims roughly 5–10 m² coverage per bag and a low-nutrient finish against seeds, but the listing has no star line and no written reviews. That leaves the joint-width line and coverage band as the main buying facts. At £39.99 it matches other specialist porcelain bags in this set without the review proof Bostik or Sika carry. Bullets describe it as ready mixed with no mixing, which reads like a sweep-and-brush job rather than a wet slurry. Until UK reviews appear, budget an extra bag for waste and verify colour against your slabs outdoors.
Pros
Cons
Best for: Outdoor porcelain or ceramic with joints up to 10 mm when you will check coverage on a small panel first.
Less suitable: Block paving, narrow 2–5 mm joints, or buyers who want hundreds of UK review texts.
Specifications
Common questions
What joint width does the Kerama listing state?
The bullets say joints up to 10 mm wide, for ceramic and porcelain tiles 20 to 30 mm thick.
What coverage does the listing claim?
Each bag covers five to ten square metres.
Does the bag include a brush?
The listing asks that question. The listing has no answer and no included-components line.
Mainbrick basalt filler is a 20 kg ready-mixed joint filler at £54.82, with basalt in the title and the same permeability and frost bullets as the sand-colour sibling. This listing has no star line, no review text and no best-sellers rank on the listing, so performance is entirely unverified on amazon.co.uk. Joint width is not stated, and the surface field mentions floor and tile without the porcelain detail other bags give. At this price it is the most expensive per kilogram among the Mainbrick lines here, yet it offers no review sample to justify that spend. It may colour-match dark basalt stone if the paste tone aligns, but plan a test joint before you commit the whole patio.
Pros
Cons
Best for: Dark stone paving when colour match matters and you will trial one joint before filling the full area.
Less suitable: Block paving, budget-led buyers, or anyone who needs a stated millimetre width.
Specifications
Common questions
What colour is this Mainbrick listing?
The title says basalt. There is no colour field in the technical block.
Does the listing say it is frost resistant?
A bullet says heat, frost and salt resistant. The listing also asks the question, and it has no answer text.
Are there reviews?
The listing has no star line and no review text.
Mainbrick sand filler is a 20 kg ready-mixed joint filler at £54.82, matching the basalt listing on price and bullet set while the title and colour field say sand. Like its basalt sibling, this page has no star line and no review text on the listing, so you cannot read how the paste behaves in UK weather. No millimetre joint width is printed, which makes it hard to line up against Sika 2–5 mm or Bostik 5–30 mm products. The listing repeats permeability and frost claims without buyer stories to confirm weed control or cure time. Choose it mainly for a sand-toned finish on stone or tile floors named in the surface field, and keep a backup plan if the colour dries lighter or darker than your slabs.
Pros
Cons
Best for: Sand-toned stone or floor tile when you will test colour and fill on one joint first.
Less suitable: Block-paving gaps, porcelain patios, or buyers who need documented width limits.
Specifications
Common questions
How does this differ from the basalt Mainbrick listing?
The title says sand, the colour field says sand, and the part number is 4280001101180. The price is also £54.82 for 20 kg.
What joint width is stated?
None. The bullets match the basalt listing: permeability, frost and salt resistance, and no weed volunteers.
Are there reviews?
The listing has no star line and no review text.
Scores use the ten amazon.co.uk listings kept for this comparison, plus the UK sheets named below: Sika Setting Sand, January 2026, and Bostik TDS02249, 25 April 2025. This is not a laboratory test, and a star rating is not a patio trial. The three weights sum to 100. Sika setting sand, buff, 20 kg, is the top pick and the best value, on review volume and price per kilogram among full bags. A 5.0 from one review does not take either award.
Amazon evidence
40%Up to 40 points from the amazon.co.uk star line and the size of the review file. A large sample adds more than a single review. Points come off when a star line has no review text, when the written reviews are United States texts, when reviews both say the joint set and say it never set, and when the only review describes a miniature tub. This block does not go below zero.
Listing fit
35%Up to 35 points. A stated millimetre range scores above an upper limit only, and a missing width scores nothing on that line. A paving job that matches the product family scores above a vague page. Points come off when an amazon.co.uk driveway or block-paving line contradicts the UK technical sheet. A pack of 12 kg or more scores for quantity. A listing weight in grams does not.
Value
25%Up to 25 points from price per kilogram in this comparison, for a patio-sized pack. The top of the band is under £1.40 per kilogram, then £1.40 to £2.00, then up to £2.50, then up to £3.20, with a low score over £10. A listing that is not a patio quantity sits at the bottom of this block. Sika at about £21.99 for 20 kg is the lowest price per kilogram among the full bags.
Paving joint compound in this set is a brush-in filler for patio, sett and block-paving gaps, not loose kiln-dried sand and not a wet mortar. The ten amazon.co.uk listings run from about £7.99 to about £155.58, and the £7.99 line is a miniature tub. Width comes first: about 2–5 mm for setting sand, and about 5 mm and wider for a ready-mixed brush-in. Depth on the Sika and Bostik sheets is at least 25 mm, with 20 mm allowed on a permeable mortar bed for Bostik.
A paving joint compound is the prepared filler you brush into patio, sett or block-paving gaps so the joint stays put better than loose sand. On amazon.co.uk the usual job is topping up a patio or finishing a path. Width decides the family. Moisture-curing setting sand is for about 2–5 mm. A ready-mixed brush-in is for about 5 mm and wider. Depth matters too. The Sika sheet from January 2026 wants at least 25 mm.
Setting sand outside 2–5 mm, or a 5–30 mm paste forced into a narrow block joint, does not follow the sheets. Soil left in the joint makes either fill worse. Measure the narrowest point and the depth before you open a bag.
Sika setting sand is swept in dry, then soaked with a spray, not a pressure washer. Rain on an unset joint, or too much water at once, is how reviews describe washout. Brush surplus off the face before you wet it. Full cure on the sheet can take up to 28 days.
The about £7.99 listing weighs 1 g on the page. The only review describes a mini tub of about 100 g. A weed-proof promise is also a weak buy: weeds still show up on set sand in the Sika reviews, and on the Dansand bag in several UK texts.
Measure the narrowest point, not the average gap, and measure the depth you can actually fill. Sika Setting Sand, on the January 2026 sheet, is for joints 2–5 mm wide and at least 25 mm deep, and not outside that range. Bostik All Weather, TDS02249 dated 25 April 2025, is for joints 5–30 mm wide and at least 25 mm deep, or 20 mm on a permeable mortar bed. That sheet is not for V-shaped joints. A listing that only says up to 10 mm, as Dansand Kerama does, is a weaker match than a from-to range.
Air-curing compound stops curing when it stays wet, so Bostik requires a free-draining site. Sika Setting Sand must not go on when rain is imminent or at 5 °C or below. Sweep it in dry, brush the surplus off the face, and soak with a spray, not a pressure washer. The sheet puts drying at about 1–2 days and full cure at up to 28 days, and it allows light vehicles when the joint is filled correctly.
Three typical situations, each with a recommendation from this comparison.
You are refilling narrow block-paving joints and you can dry-brush, then mist, not jet. Sika setting sand, buff, 20 kg, is about £21.99 with 4.2 from 2,591 ratings. The sheet limits it to 2–5 mm and at least 25 mm deep. Weeds can still sit on the surface after the sand has set.
You have a patio or path with joints from 5 mm to 30 mm and a base that drains. Bostik All Weather, basalt, 15 kg, is about £39.35 with 4.4 from 46 ratings. Read the UK sheet before a driveway: it excludes block paving and driveways, even where the amazon bullets mention them.
Do not copy a block-paving sand method onto porcelain. Marshalls says sand-and-cement brushed into 3–5 mm porcelain joints will not stay rigid and can stain. Dansand Kerama grey, 15 kg, about £39.99, states joints up to 10 mm and 5–10 m². This listing has no reviews.
The top pick and the best value are the same bag: Sika setting sand, buff, 20 kg, about £21.99, with 4.2 from 2,591 amazon.co.uk ratings. It is the only four-figure sample and the lowest price per kilogram among full bags, for joints of 2–5 mm. A 5.0 from one review, with no review text, does not take either award. For joints of 5–30 mm, Bostik All Weather is the ready-mixed tub, and its UK sheet excludes driveways and block paving.
Sika setting sand, buff, 20 kg
Best value on the same bag. A miniature £7.99 tub and a 5.0 from one review do not undercut that price per kilogram.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sheets and guidance, plus the amazon.co.uk listing lines kept for these ten products. This is not a laboratory test.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars, and review counts are the UK listing lines. We did not run a lab test.
