A few failed joints
You have a short dry repair and you already own a mastic gun. The SX Siroflex 300 ml cartridge is the best value at about £7.96, with 4.2 from 1,388 reviews. Keep the joint dry and above 5°C. One tube is a few slabs, not a patio.
Paving joint mortar comparison 2026
The best paving joint mortars, compared.
Top pick: Laeto Easy Mix mortar, 20 kg Best value: SX Siroflex mortar repair, 300 ml – Best value for a short point: lowest price in the set and 1,388 reviews. Updated October 2026.
Paving joint mortar fills the gap between patio slabs, flags or blocks after they are bedded. On amazon.co.uk that can be a sand-and-cement mix, a pre-blended bag, a pointing cartridge, or a ready brush-in compound. People buy it to repoint a patio, finish a new one, or replace sand that washes out. Width, depth, a drained base, and whether you mix or brush decide the pack. Those checks are in the [paving joint mortar buying guide](/hub/flooring-tools-and-accessories/paving-joint-mortar/sub/paving-joint-mortar-buying-guide).
Paving joint mortar fills the gap between patio slabs, flags or blocks after they are bedded. On amazon.co.uk that can be a sand-and-cement mix, a pre-blended bag, a pointing cartridge, or a ready brush-in compound.
32 products checked · 64 hrs invested · +24,180 readers
9 of 9: Best paving joint mortars compared
Swipe for more
1-2 of 9Best overall
Best value
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∼ £15
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4.6(320)
4.5(5,459)
4.4(3,628)
4.4(46)
4.3(185)
4.2(1,388)
4.2(393)
3.4(9)
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Personal buying guide
Which paving joint mortar fits?
Question 1 of 2
How big is the pointing job?
The best paving joint mortars in detail
Our view
Laeto Easy Mix is a 20 kg pre-blended sand and cement at £15.29, rated 4.6 from 320 reviews, and the bullets name pointing and bedding patio slabs as well as brick repairs. You only add water. The listing does not give a joint width or a setting time in minutes, and it does not say whether a sealer is required. Many reviewers say it mixes easily and sets hard. Several also say it feels short of cement or heavy on sand, and that a 20 kg bag is awkward to handle. The higher star line sits on a much smaller sample than Cementone's 5,459 reviews. It is a reasonable bulk bag when you want one blend for bedding and pointing, not automatic proof that it outperforms the 10 kg tub.
Pros
- 20 kg pre-blended powder at £15.29
- 4.6 from 320 reviews
- Pointing and bedding patio slabs are both named
- Add water only, for indoor and outdoor patching
Cons
- No joint width or setting time in minutes
- Some reviews call the blend sand-heavy or short of cement
- 20 kg is heavy to handle
- 320 reviews is a thinner sample than Cementone or Jetcem
Best for: Bedding and pointing a modest patio when you want one pre-blended 20 kg bag and can lift it.
Less suitable: A stated millimetre joint, a small repair, or anyone who needs the largest review sample.
Specifications
- Model
- Laeto Easy Mix mortar, 20 kg
- Brand
- Laeto
- Price
- ∼£15
- Customer rating
- 4.6/5(320)
- Pack
- 20 kg
- Type
- Premixed mortar
- Mix
- Premixed powder
- Application
- Add water
- Stated use
- Pointing, bedding
- Weather
- Indoor, outdoor
- Colour
- Mortar
- Material
- Concrete
Common questions
Do you only add water to the Laeto bag?
Yes. The listing says it is a pre-blended sand and cement mix and that you just add water. It does not state a joint width or a setting time in minutes.
Can it bed patio slabs?
The bullets name pointing, bedding patio slabs, brick mortar repair and indoor and outdoor patching. Whether it needs a sealer is asked on the listing and not answered.
What do buyers say about the mix?
It is 4.6 from 320 reviews. Many say it mixes easily and sets hard. Several say it feels short of cement or heavy on sand, and that the 20 kg bag is heavy.
Our view
Bostik Cementone is a 10 kg tub of pre-mixed grey cement and sand at £14.99, rated 4.5 from 5,459 amazon.co.uk reviews, the deepest review file here. You add water and mix in the tub for pointing, patching and brick or block laying, inside or outside, and the listing states water resistance without a joint width in millimetres. Several buyers like the light grey once it dries. Others say that grey is too light beside existing brick mortar. Delivery complaints include a cracked tub or lid. Reviews also say to use very little water and to mix a small amount so the rest of the powder stays usable. It is the top pick in this set for a general pointing tub with a large UK review count, not for a stated 5–30 mm permeable joint.
Pros
- 10 kg pre-mixed blend, add water in the tub
- 4.5 from 5,459 reviews, the largest sample here
- Listing covers pointing, patching and masonry repairs
- £14.99 for a general interior and exterior mortar
Cons
- No joint width in millimetres
- Light grey is too pale for some existing brick mortar
- Cracked tubs or lids show up in delivery reviews
- Easy to over-water, and a large mix wastes the tub
Best for: General pointing and patching on stable masonry or concrete flags when you do not need a stated permeable width.
Less suitable: A 5–30 mm brush-in joint, a colour match to darker brick mortar, or thin porcelain.
Specifications
- Model
- Bostik Cementone mortar, 10 kg
- Brand
- Bostik
- Price
- ∼£15
- Customer rating
- 4.5/5(5,459)
- Pack
- 10 kg
- Type
- Premixed mortar
- Mix
- Premixed powder
- Application
- Add water
- Stated use
- Pointing, patching
- Weather
- Indoor, outdoor
- Colour
- Grey
- Material
- Cement
Common questions
Is Cementone already blended?
Yes. The listing calls it a pre-mixed blend of cement and dry sand that you mix with water in the tub. It is not two separate bags.
Does the tub state a joint width?
No. It is for brick and block laying, patching, pointing and masonry repairs, inside or outside. Water resistance is stated. No millimetre range is given.
What do the reviews say about colour and the tub?
It is 4.5 from 5,459 reviews. Several buyers like the light grey. Some say that grey is too light for existing brick mortar. Others report a cracked tub or lid after delivery.
Our view
Everbuild Jetcem is a 6 kg bag of premixed grey sand and cement at £10.70, with 4.4 from 3,628 reviews, the second-largest sample in this set. The listing's full-cure field is 30 minutes and the compatible material is concrete, with no joint width. Buyers still use it between paving slabs, in path cracks and on steps, which is reported use rather than a stated patio width. The practical complaint is speed: reviewers often find the mix unusable in about 10 minutes, so they mix a little at a time. Item weight is listed at 5.89 kg and the pieces field says 2, which does not match the included line of one bag, so trust the 6 kg title. It suits a small fast repair if you can work in short batches, and it is a poor choice for a long pointing session.
Pros
- Premixed powder, add water, in a 6 kg bag
- 4.4 from 3,628 reviews
- £10.70 for a small rapid repair
- Buyers report use in slab joints, path cracks and steps
Cons
- Reviews often lose the mix in about 10 minutes, inside a 30-minute listing cure
- No joint width, and the stated material is concrete
- Pack lines disagree: 6 kg title, 5.89 kg weight, pieces field says 2
- A whole-bag mix is easy to waste
Best for: A small concrete repair or a few joints when you will mix only what you can place immediately.
Less suitable: A long pointing session, or a joint that needs a stated width and a slow mix.
Specifications
- Model
- Everbuild Jetcem rapid repair, 6 kg
- Brand
- Sika Everbuild
- Price
- ∼£11
- Customer rating
- 4.4/5(3,628)
- Pack
- 6 kg
- Type
- Rapid cement
- Mix
- Premixed powder
- Application
- Add water
- Stated use
- Concrete repair
- Working time
- 30 min
- Weather
- Water resistant
- Colour
- Grey
Common questions
How fast does Jetcem set?
The listing full-cure field is 30 minutes. Reviews often say the mix is unusable in about 10 minutes, so buyers mix a small batch.
Does the listing state a joint width?
No. Compatible material is concrete. Reviews use it between paving slabs, in path cracks and on steps, which is buyer use rather than a stated width.
What is in the 6 kg pack?
Included components say 1 bag of premixed sand and cement. Item weight is 5.89 kg. The number-of-pieces field says 2. Colour is grey.
Our view
Bostik All Weather jointing compound is a 15 kg Basalt tub at £39.35, rated 4.4 from 46 reviews, and it is the only listing here that states a joint of 5 mm to 30 mm. The bullets say it is ready from the tub, with no mixing, for paths, patios, driveways and domestic paving, including natural stone, concrete, slate, clay, terracotta, granite and ceramic. Nine review texts are on the listing. One buyer used a little, resealed the tub and found it solid before the next section. The manufacturer sheet for the same compound excludes driveways and block paving and asks for a permeable bed at least 25 mm deep, so the amazon driveway line and the sheet do not say the same thing. Buy it for a path or patio joint inside that width if you can empty the tub in one spell of work, not for a drive.
Pros
- Ready Basalt paste, no mixing, 15 kg at £39.35
- Stated permeable joints of 5–30 mm
- 4.4 from 46 reviews
- Paths, patios and a wide list of paving materials on the listing
Cons
- Amazon bullets name driveways; the UK sheet excludes them and block paving
- Needs a permeable bed and at least 25 mm depth on the sheet
- A part-used tub went solid for one reviewer
- 46 reviews is a small sample next to the cement tubs
Best for: A path or patio with 5–30 mm joints at least 25 mm deep on a base that drains.
Less suitable: Driveways, block paving, a wet sealed bed, or a joint under 5 mm.
Specifications
- Model
- Bostik All Weather jointing compound, 15 kg
- Brand
- Bostik
- Price
- ∼£39
- Customer rating
- 4.4/5(46)
- Joint width
- 5–30 mm
- Pack
- 15 kg
- Type
- Joint compound
- Mix
- Ready paste
- Application
- No mixing
- Stated use
- Paths and patios
- Weather
- Water resistant
- Colour
- Basalt
- Material
- Polyurethane
Common questions
What joint width does this Bostik tub state?
The bullets say permeable joints of 5 mm to 30 mm. They name natural stone, concrete, slate, clay, terracotta, granite and ceramic, on paths, patios and driveways.
Do you mix it with water?
No. The listing says it is ready to use from the tub and that no mixing is required. This colour is Basalt. Other colours are not listed on this ASIN.
What happened when a buyer resealed the tub?
It is 4.4 from 46 reviews. One buyer used a little, resealed the tub, and found it solid before the next section.
Our view
The sharp-sand Home Pack is another 5 kg, at £9.98 and 4.3 from 185 reviews, sold for pointing, patching, rendering and brick laying on brick, concrete and stone. The title calls it a ready-to-use mixed dry mortar, while the bullets still say mix 1 part cement to 6 parts sand. Reviews say the sand and cement arrived as separate bags, sometimes with damp sand. You have the same 30-minute window as the other Home Pack, and no millimetre joint is stated. At least one review calls it suitable for patio patching, and others used it on loose bricks. Square-metre coverage is not on the listing. Choose it only if you want sharp sand in a small pack and will mix the ratio yourself, not if you expected one dry blend.
Pros
- Sharp sand and cement in a 5 kg pack at £9.98
- 4.3 from 185 reviews
- Listed for pointing and patching on brick, concrete and stone
- Water-resistant claim for internal and external use
Cons
- Reviews report separate bags and sometimes damp sand
- Title says mixed dry mortar while the ratio is still 1:6
- 30-minute window and no stated joint width
- Coverage in square metres is not given
Best for: A small pointing or patching job where you want sharp sand and will mix 1:6 yourself.
Less suitable: A pre-blended single powder, or a patio that needs a stated joint width.
Specifications
- Model
- Home Pack sharp sand and cement, 5 kg
- Brand
- DTD QUALITY MATTERS
- Price
- ∼£10
- Customer rating
- 4.3/5(185)
- Pack
- 5 kg
- Type
- Sharp sand mix
- Mix
- 1:6 split bags
- Application
- Mix, then point
- Stated use
- Pointing, patching
- Working time
- 30 min
- Weather
- Indoor, outdoor
- Colour
- Neutral
- Material
- Cement and sand
Common questions
Is this sharp sand pack a single dry mix?
The title says ready to use mixed dry mortar, and the bullets also say mix 1 part cement to 6 parts sand. Reviews say the sand and cement arrived in separate bags, and some sand was damp.
What can the listing be used on?
Pointing, screeding, patching, rendering and brick laying, on brick, concrete and stone, inside or outside. No joint width is stated.
How many UK reviews mention patio patching?
The listing is 4.3 from 185 reviews. At least one review calls it perfect for patio patching. Others used it for loose bricks. Coverage in square metres is not stated.
Our view
The SX Siroflex cartridge is a 300 ml buff paste at £7.96 for short pointing, not a patio's worth of joints. Across 1,388 amazon.co.uk reviews it sits at 4.2, which is a large sample for a tube this size. You cut the seal, fit the supplied V nozzle and drive it with a gun the box does not include, because the paste is often firm. The listing limits you to dry conditions above 5°C and wants the surface kept dry for at least five hours. Reviewers who tried a damp joint say it does not willingly stick. Coverage is small: one buyer pointed about two and a half slabs, another about six. It is the best value in this set when a few joints are all you need and you already own a gun.
Pros
- 300 ml ready paste at £7.96 with no mixing
- 4.2 from 1,388 amazon.co.uk reviews
- V nozzle supplied for a small pointing repair
- Clear dry-weather and above-5°C limit on the listing
Cons
- Applicator gun is not in the box and the paste is often stiff
- Poor bond on a damp joint, with five hours dry afterwards
- Coverage is a few slabs, not a whole patio
- No joint width in millimetres
Best for: A few dry joints on a small repair when you already own a mastic gun.
Less suitable: A full patio, a damp surface, or any joint you cannot keep dry for five hours.
Specifications
- Model
- SX Siroflex mortar repair, 300 ml
- Brand
- Siroflex
- Price
- ∼£8
- Customer rating
- 4.2/5(1,388)
- Pack
- 300 ml
- Type
- Cartridge repair
- Mix
- Ready paste
- Application
- Gun and V nozzle
- Stated use
- Small pointing
- Working time
- Dry for 5 h
- Weather
- Dry, above 5°C
- Colour
- Buff
- Material
- Cement mortar
Common questions
Can you use this SX cartridge on a damp joint?
The listing says apply only in dry conditions and keep the surface dry for at least five hours. The product and the substrate should be above 5°C. Reviews say it does not willingly stick to damp surfaces.
Do you need a gun for the 300 ml tube?
Yes. The listing says cut the seal, fit the supplied V nozzle, and use a good quality applicator gun because the paste can be firm. A gun is not in the box.
How far does one 300 ml tube go?
The listing does not state a coverage. Reviews say it is a small job: one buyer pointed about two and a half slabs, another about six. Several buyers called the tube stiff.
Our view
Home Pack's 5 kg mortar mix is £8.99 and rated 4.2 from 393 reviews, and it is sand and cement you combine yourself at 1 part cement to 6 parts sand. The listing says the parts are packed separately and that you should use the mix within 30 minutes. Reviews describe a bag of sand and a bag of cement, so this is not a single blended powder you only wet. No joint width is stated, and the stated uses run from bricklaying to pointing, rendering and screeding. Some buyers found the 1:6 joint stayed soft enough to scrape with a fingernail, others added extra cement, and one said it cracked twice. It can patch a small area if you accept a lean mix and a short working time, though it is a poor stand-in for a damp 1:4 pointing mix on ordinary flags.
Pros
- 5 kg at £8.99 for a small mix-it job
- Stated 1:6 ratio and a 30-minute working time
- 4.2 from 393 reviews
- Listed for internal and external pointing and patching
Cons
- Cement and sand are packed separately, not one blend
- 1:6 is leaner than a typical damp 1:4 pointing mix
- Reviews include a soft joint and one that cracked twice
- No joint width stated
Best for: A small patch where you will mix 1:6 yourself and can use it within 30 minutes.
Less suitable: Anyone expecting a pre-blended tub, or a patio point that should follow a 1:4 damp mix.
Specifications
- Model
- Home Pack mortar mix, 5 kg
- Brand
- DTD QUALITY MATTERS
- Price
- ∼£9
- Customer rating
- 4.2/5(393)
- Pack
- 5 kg
- Type
- Sand and cement
- Mix
- 1:6 split bags
- Application
- Mix, then point
- Stated use
- Pointing, patching
- Working time
- 30 min
- Weather
- Indoor, outdoor
- Colour
- Off-white
- Material
- Cement
Common questions
Is the Home Pack mortar already blended?
No. The listing says cement and building sand are individually packed, and the mix is 1 part cement to 6 parts sand. Reviews describe a bag of sand and a bag of cement.
How long do you have once it is mixed?
The listing says use it within 30 minutes and states a 30 minute setting time. It does not give a joint width.
Did reviewers find the 1 to 6 mix strong enough?
Some did. Others said it stayed soft enough to scrape with a fingernail, or they added extra cement. One review said it cracked twice.
Our view
Joint-it Simple is a 12.5 kg dark grey ready paste at £155.58, rated 3.4 from 9 reviews, and the three review texts shown are marked United States. The listing names pavers, flagstones, slabs and porcelain, claims wet application in sun or rain, and does not state a joint width in millimetres. One of those texts says it was not permeable as advertised, and another found a tub hard as concrete before use. The material field says silicone, which is an odd label for a paving joint filler and is what the page prints. The maker asks for at least 3 mm by 25 mm on a permeable base, a depth a 20 mm porcelain slab cannot give unless you cut the bed back. At this price, with a US-only review sample on the listing, it is not the default top pick for a UK patio.
Pros
- Ready paste with porcelain named as compatible
- Wet application in sun or rain is claimed on the listing
- 12.5 kg dark grey tub
- Water resistance is stated
Cons
- £155.58 with 3.4 from 9 reviews, and the texts shown are from the US
- No joint width on the amazon.co.uk listing
- One review says it was not permeable; another tub was already solid
- A 25 mm maker depth does not fit a 20 mm slab unless the bed is cut back
Best for: Only if you have checked the live UK listing and your joint meets the maker's 3 mm by 25 mm permeable-base rule.
Less suitable: A default patio buy, a price-led choice, or porcelain you cannot cut back to 25 mm depth.
Specifications
- Model
- Joint-it Simple, 12.5 kg dark grey
- Brand
- Joint-It
- Price
- ∼£156
- Customer rating
- 3.4/5(9)
- Pack
- 12.5 kg
- Type
- Ready joint filler
- Mix
- Ready paste
- Application
- Wet, from the tub
- Stated use
- Pavers, porcelain
- Weather
- Sun or rain
- Colour
- Dark grey
- Material
- Silicone
Common questions
Does this listing state a joint width?
No. It describes a ready joint filler for pavers, flagstones and slabs, with porcelain as the compatible material. The pound line on the listing is not a UK coverage figure.
Can it be applied in the rain?
The bullets say wet application in sun or rain. Water resistance is stated. One of the three review texts says it was not permeable as advertised.
Where were the reviews written?
The rating line is 3.4 from 9 reviews. The three review texts on the listing are marked United States. One tub was hard as concrete before use.
Our view
Dansand Kerama is a 15 kg grey brush-in grout at £39.99 for ceramic and porcelain 20 to 30 mm thick, with joints up to 10 mm on the listing. The page claims 5 to 10 square metres per bag and a sweep-in method with no mixing. A brush is not confirmed in the box. The captured listing has no Customer Reviews line, so there is no UK star rating to lean on and the score stays at zero. The maker's own window is tighter than up to 10 mm: 3 to 10 mm, at least 20 mm deep, on an unbound permeable base, applied dry and above 5°C. A bound concrete bed sits outside that window because the binder does not harden the same way. It is the bag to read for 20–30 mm porcelain inside 3–10 mm, and the wrong bag for a 2 mm butt joint or for ordinary thick concrete flags.
Pros
- States ceramic and porcelain 20–30 mm thick
- Sweep-in, no mixing, joints up to 10 mm on the listing
- 15 kg at £39.99 with a claimed 5–10 m²
- Maker window adds a 3 mm floor and a 20 mm depth
Cons
- No Customer Reviews line on the captured UK listing
- Unbound permeable base only; a bound bed stops the cure
- A 2 mm butt joint is outside 3–10 mm
- Brush not confirmed in the box
Best for: 20–30 mm porcelain or ceramic on an unbound draining base, with joints from 3 mm to 10 mm.
Less suitable: Thick concrete flags, a mortar bed, a joint under 3 mm, or anyone who needs UK stars.
Specifications
- Model
- Dansand Kerama patio grout, 15 kg
- Brand
- Dansand
- Price
- ∼£40
- Joint width
- Up to 10 mm
- Pack
- 15 kg
- Type
- Brush-in grout
- Mix
- Ready mixed
- Application
- Sweep in
- Stated use
- Porcelain 20–30 mm
- Weather
- Rain claimed
- Colour
- Kerama grey
Common questions
Which slabs is Kerama stated for?
The bullets specify ceramic and porcelain tiles 20 to 30 mm thick, and joints up to 10 mm. They also mention block paving and concrete decorative surfaces. It is not stated for every slab.
How much area does one 15 kg bag claim?
Each bag covers five to ten square metres on the listing. Application is sweep-in, with no mixing. A brush is not confirmed in the box.
Is there a UK star rating?
The captured listing has no Customer Reviews line, so the rating is not available. Price on the captured page is £39.99.
How we compared
Nine amazon.co.uk listings were scored from the review line, the limits printed on the page, and the shelf price in GBP. Bostik Cementone carries the top-pick mark and the SX Siroflex cartridge carries the best-value mark from those listing awards. This is not a laboratory test. Weights follow the buying checks: joint size 30, paving and base 25, application 20, permeability and siting 15, pack size and reviews 10.
1
Joint width and depth
30%Whether the listing or the maker sheet states a width and a depth that match the gap. A butt joint of about 2 mm sits outside the windows quoted for Bostik All Weather, Joint-it Simple and Dansand Kerama.
2
Paving and base
25%Whether the pack is stated for ordinary concrete flags, for 20–30 mm porcelain or ceramic, or for a permeable unbound bed. A product that needs a draining base is not a match for a sealed mortar bed.
3
Application
20%Whether you add water to a pre-blend, combine separate sand and cement, brush a ready compound, or gun a cartridge. A 30-minute window and a missing gun are part of this check.
4
Permeability and siting
15%A rigid cement joint is the low-permeability option. A permeable compound still needs drainage under the slabs. A frontage over the planning threshold is a separate rule from the tub.
5
Pack size and reviews
10%A cartridge or a 5–10 kg bag is a repair. A 15–20 kg pack covers a patio only if the joint matches the maker’s table. Stars on a general cement do not prove the joint fit. Review count is read with the star line.
Independent review
Last updated: October 2026
8 sources checked
Paving joint mortar buying guide
Nine packs sit in this table, from a 300 ml cartridge at about £7.96 to a 12.5 kg ready paste at about £155.58. Buy the joint size and the base before the star line. A general cement tub can point ordinary flags. It does not state a 5–30 mm permeable window. A brush-in compound is a different job from a 1:6 sand-and-cement bag.
What is paving joint mortar?
Paving joint mortar fills the gap between patio slabs, flags or blocks after they are bedded. In the UK that covers a damp sand-and-cement joint, a pre-blended bag you mix with water, a pointing cartridge, and a ready-to-use brush-in compound sold as a mortar alternative. People buy it to repoint a patio, finish a new one, or replace loose sand that washes out.
Best for
- A few dry joints when you already own a mastic gun
- General pointing on stable concrete flags with a pre-mixed tub
- 20–30 mm porcelain on an unbound base that drains
Not ideal for
- A 2 mm butt joint, or a width the listing never states
- Vehicle use, rocking slabs, or a fall towards the house
- Dry-brushing sand and cement into patio joints
Mistakes to avoid
- 1
Dry-brushing sand and cement
Marshalls tells installers not to brush dry or semi-dry sand and cement into joints. A damp point on a full bed is the ordinary-flag method. Home Pack is a 1:6 split in separate bags, which is leaner than a typical 1:4 damp pointing mix.
- 2
Pointing slabs that move
Joint-it needs flags that do not move, on a permeable base. Pointing a rocking slab locks the fault in. Mixing a whole bag of Jetcem is the same kind of waste: reviews often lose the mix in about ten minutes.
- 3
Using Kerama on a bound base
Dansand Kerama is for an unbound permeable base, dry, above 5°C, in a 3–10 mm joint. A bound concrete bed stops that cure. A promise that a joint stops weeds is not a permanent result, and a permeable joint does not grant planning permission.
What to weigh up
Joint width and depth
HighThe first check is the gap, not the star line. Bostik All Weather is specified at 5–30 mm wide and at least 25 mm deep. Joint-it Simple wants at least 3 mm by 25 mm and is not for V joints. The amazon listing for Joint-it does not print that width. Dansand Kerama is 3–10 mm wide and at least 20 mm deep. The Kerama listing says joints up to 10 mm. The maker window adds the 3 mm floor. A butt joint of about 2 mm is outside all three.
Base, mix and permeability
HighOrdinary concrete flags with joints around 10 mm can take a damp sand-and-cement point on a full mortar bed. Marshalls tells installers not to brush dry or semi-dry sand and cement into the joints, and to sponge cement off the face. Home Pack is 1 part cement to 6 parts sand, packed separately in the reviews, and that is leaner than a 1:4 damp mix. Cementone and Laeto are pre-blended powders you wet. Jetcem is premixed and fast: the listing says 30 minutes, and reviews often say about ten.
Which option suits you?
Three typical situations, each with a recommendation from this comparison.
General pointing on flags
You want a pre-mixed tub for pointing and patching, and you do not need a stated permeable width. Bostik Cementone is the top pick: 10 kg, add water, 4.5 from 5,459 reviews, about £14.99. The light grey can look pale beside darker brick mortar.
20–30 mm porcelain
The slabs are ceramic or porcelain about 20–30 mm thick, on an unbound base that drains, and the joints are 3–10 mm. Dansand Kerama is the bag that states that use. The captured listing has no UK star line. A 2 mm butt joint is outside the window.
Common questions about paving joint mortars
Which paving joint mortar is the top pick?
The top pick is Bostik Cementone, a 10 kg tub of pre-mixed grey cement and sand at about £14.99. You add water in the tub for pointing, patching and brick or block laying. amazon.co.uk shows 4.5 from 5,459 reviews, the deepest file in this set. The listing does not state a joint width. Some buyers find the light grey too pale beside existing brick mortar.
Which paving joint mortar is the best value?
The best value is the SX Siroflex 300 ml buff cartridge at about £7.96, with 4.2 from 1,388 reviews. It is a ready paste for a few dry joints, not a patio. You need an applicator gun, which is not in the box. The listing wants dry conditions above 5°C, with the surface kept dry for at least five hours. Reviewers who tried a damp joint say it does not willingly stick.
How much does paving joint mortar cost?
Captured amazon.co.uk prices in this set run from about £7.96 to about £155.58. The cartridge and the 5–10 kg mixes sit from about £7.96 to about £15.29: SX, both Home Packs, Jetcem, Cementone and Laeto. Mid-pack is Bostik All Weather at about £39.35 and Dansand Kerama at about £39.99. Joint-it Simple is about £155.58 for 12.5 kg. These are captured listings, not a market survey.
What joint width should the product state?
Match the width and depth to the gap you have. Bostik All Weather is specified at 5–30 mm wide and at least 25 mm deep. Joint-it Simple wants at least 3 mm by 25 mm. Dansand Kerama is 3–10 mm wide and at least 20 mm deep. A butt joint of about 2 mm is outside those windows. Cementone, Laeto, Jetcem, both Home Packs and the SX cartridge state no millimetre width.
Should you brush dry sand and cement into the joints?
Marshalls tells installers not to brush dry or semi-dry sand and cement into joints. Ordinary concrete flags with joints around 10 mm can take a damp point, often around 1:4, on a full mortar bed, with cement sponged off the face. Both Home Pack listings are a 1:6 split, and reviews describe separate bags, which is leaner than that damp mix. Stars on a general cement do not prove the joint will fit your slabs.
Can the same mortar point porcelain slabs?
Porcelain and outdoor ceramic about 20–30 mm thick are the Dansand Kerama job: an unbound permeable base, dry, above 5°C, joints of 3–10 mm and at least 20 mm deep. A bound concrete bed sits outside that window. A 20 mm slab cannot give Joint-it’s 25 mm depth unless you cut the bed back. A ready brush-in is a separate comparison: see paving joint compound.
When should you call a professional?
Call a professional for vehicle use, hollow or rocking slabs, a fall towards the house, a listed building or conservation area, an impermeable frontage over the planning threshold, or dry-grinding a large area of old mortar. Mixing a whole bag of Jetcem often goes off before you can place it. Wet cement can burn. Raking old mortar makes silica dust.
Does a permeable joint grant planning permission?
A permeable joint does not grant planning permission. In England, a hard surface between the front wall and a highway that exceeds 5 m² must be porous or drain to a permeable area in the curtilage. Scotland’s frontage rule has no 5 m² exception. Wales allows up to 5 m² of repair without a permeable build. BS 7533-101:2021 is the design standard for modular paving. It does not approve a retail tub.
Our verdict
The top pick is Bostik Cementone at about £14.99. It is a 10 kg pre-mixed tub with 4.5 from 5,459 reviews, and the listing does not state a joint width. The best value is the SX Siroflex cartridge at about £7.96, with 4.2 from 1,388 reviews, for a few dry joints when you already own a gun. Laeto has higher stars on 320 reviews and names patio bedding. Bostik All Weather is the listing that states 5–30 mm. Joint-it Simple is the dearest pack, at about £155.58, with 3.4 from 9 reviews.
Best value
View offer
SX Siroflex mortar repair, 300 ml
Best value for a short point: lowest price in the set and 1,388 reviews.
Editorial
DIY & tools editor
Paving jointsFlooring toolsamazon.co.uk listings
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.
Updated: October 2026
8 sources checked
Guides to paving joint mortars
Guides on what to look for, how to use a product, and common mistakes.
Paving joint mortar buying guideChoose a type from joint size, paving and whether you will mix. The main page lists the packs.Best paving joint mortarWhich kept listing fits a small repair, a mix-it bag, or a brush-in patio.How to point paving joint mortarPoint without staining the face or wasting a fast mix. Method, not a ranking.Paving joint mortar for porcelainNarrow joints on 20–30 mm porcelain or outdoor ceramic. Concrete flags stay on the how-to.Paving joint mortar vs sand and cementA mortar bag against a ready jointing compound. One trade-off.
Related comparisons
Sources
Public sources used for this comparison, with the amazon.co.uk listings read on 20 October 2026.
- Bostik UK TDS02249, All Weather jointing compound (retrieved 20 October 2026)
- Joint-it Simple (retrieved 20 October 2026)
- Dansand Kerama (retrieved 20 October 2026)
- Marshalls concrete paving installation guidelines (retrieved 20 October 2026)
- England: permitted development technical guidance (retrieved 20 October 2026)
- BSI on BS 7533-101 (retrieved 20 October 2026)
- HSE: cement (retrieved 20 October 2026)
- HSE: chasing concrete and raking mortar (retrieved 20 October 2026)
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are from the listings. This is not a laboratory test.