The best Decorators caulk cartridges, compared.
Top pick: Soudal six-pack Best value: SX Siroflex 310 ml – Best value as the lowest spend for one named white UK cartridge, about £4.99, with 4.4 from 134 reviews and no printed skin time. Updated October 2026.
Decorator's caulk is a white, paintable acrylic for skirting, architraves, coving, and window boards, not a shower silicone. A bullet that says water resistant is a listing claim, not a sanitary class. Quality shows up as a named acrylic, a paint window you can read, and UK review text rather than a US fluid-ounce file. Twins cost less per millilitre if you will use both tubes. That figure does not replace the single-tube badge. The full-cure field of 15 minutes on repeats the tack line. Sika's sheet puts full cure at 3 to 5 days. The checks for type, gap, and pack are in the [decorators caulk buying guide](/hub/painting-supplies/decorators-caulk/sub/decorators-caulk-buying-guide). Decorator's caulk is a water-based acrylic cartridge sealant for gaps that will be painted. Typical joints are skirting to wall, architraves, coving, window boards, and small cracks in sound plaster. UK buyers here are DIY decorators and jobbing painters who want a white, paintable bead.
Decorator's caulk is a white, paintable acrylic for skirting, architraves, coving, and window boards, not a shower silicone. A bullet that says water resistant is a listing claim, not a sanitary class.
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Personal buying guide
Question 1 of 2
How many tubes will you use?
This Soudal six-pack is six decorator cartridges at £11.73, with 4.7 from 364 UK reviews. The first 50 texts mostly praise the price and how easily the paste fills cracks, and one review reports little shrinkage so far. The colour field says clear, not white, and the browse rank sits in Silicone Caulk while the title still says acrylic decorator caulk. Skin time is 20 minutes and the full-cure field is 24 hours. One buyer found a 24 hour wait before paint frustrating. Two of six cartridges split along the side in one order, and another review described later shrinkage on ceiling and skirting lines. Buy the six-pack only when the photo and the colour field match a clear joint. It is not the white default, even at about £1.96 a tube.
Pros
Cons
Best for: A clear or stained trim run where you will actually use several tubes.
Less suitable: A white painted skirting job, or anyone who needs a gun in the box.
Specifications
Common questions
Is this six-pack white?
The colour field says clear. The title does not say white. Check the product photo before you buy it for a painted white joint.
Why is it listed under silicone caulk?
The best-sellers line places it at number 6 in Silicone Caulk. The title and bullets still describe a paintable acrylic decorator caulk with a 10 mm gap.
What went wrong in the UK reviews?
Praise is mostly price and ease. Complaints in the first 50 texts include cartridges that split, shrinkage on ceiling and skirting lines, and a 24 hour wait before painting.
The Soudal white twin is two acrylic cartridges, about 290 ml each, at £6.18, with 4.6 from 1,051 amazon.co.uk reviews. The first 50 UK texts praise easy flow and a neat finish on door frames and skirting, and one buyer said it dried in about an hour depending on temperature. The listing allows a 10 mm gap and says the paste is paintable and can be papered over. Initial hardening is 20 minutes. The full-cure field reads 2E+1 minutes, which is not a usable cure time. One buyer wanted more flexibility and said it still cracked after extra coats. Another said both tubes in an order were not fit for use, and a review that expected 310 ml received 290 ml, which matches the volume field. It is the plain white Soudal pack when you want a stated gap and a higher star line than Caulk Once, on a smaller review count.
Pros
Cons
Best for: White door frames and skirting where a stated 10 mm gap matters more than the largest review count.
Less suitable: A joint that keeps moving, or a job that needs an hour-count printed on the Amazon page.
Specifications
Common questions
Can you paint this twin pack?
The bullets say it is paintable and can be papered over. They do not give an hour count. Initial hardening is 20 minutes. The full-cure field reads 2E+1 minutes, which is not a usable cure time.
How wide a gap does the listing allow?
Maximum gap fill is 10 millimetres. That figure is a width, not a depth, and the listing does not mention a backer rod.
What do UK reviewers say about cracking?
Most of the first 50 texts praise the finish on door frames and skirting. One buyer said it still cracks and that they would want something more flexible next time. Another said a 310 ml claim arrived as 290 ml, which matches the volume field.
The Everbuild Caulk Once twin is two 295 ml white acrylic cartridges listed at £5.38 on amazon.co.uk. Across a 4.5 score from 11,926 reviews, the first 50 UK texts describe an easy bead on skirting and other decorating gaps, with a finish buyers can smooth and paint. The bullet gives a tack of about 15 minutes and says you can overpaint in 1 hour, depending on site conditions. The full-cure field repeats 15 minutes, which matches that tack line rather than a through-cure. A cartridge without a nozzle turns up more than once. One of two tubes failed at the back and emptied in a powered gun, and at least one pack was short-dated, so a tube was wasted. In this set it is the top pick for a white painted trim job, because the review count and a published paint window sit together. Water resistant on the listing is not a sanitary class for a bath.
Pros
Cons
Best for: A white skirting, architrave, or frame job where you will use both tubes and you can wait out the real cure.
Less suitable: A bath or shower joint, or a first job that needs a gun in the box.
Specifications
Common questions
How soon does this listing say you can paint it?
The bullet says a tack time of 15 minutes and that it can be overpainted in 1 hour, depending on site conditions. The separate full-cure field also says 15 minutes, which repeats the tack figure rather than a longer cure.
Is a gun in the box?
No. Included components name a caulk cartridge. The title and pack count say two 295 ml cartridges, while that components line says one.
What do the UK reviews repeat?
The first 50 UK texts praise easy flow on skirting and the price. Repeated snags are a missing nozzle and, in one case, a tube that failed at the back in a powered gun.
Red Devil 0770 is one white 10.1 fl oz acrylic latex cartridge at £11.95. The amazon.co.uk line is 4.4 from 3,390 reviews, but the 46 stored texts are marked as reviewed in the United States. Those US comments praise a smooth, paintable, matte white bead on trim and indoor seams, with water clean-up. The full-cure field is 24 hours. At least one US review calls it runny, with a lot of shrinkage if the bead is not overfilled, and cracking appears both as a problem solved and as a remaining fault. The title says acrylic latex while a details field says Rubber. At this price it is a single US-size tube, and the written reviews are not British buyers.
Pros
Cons
Best for: A buyer who specifically wants this US latex cartridge and will not treat the stored texts as UK opinion.
Less suitable: A British decorating job you want judged on UK reviews and a white tube under £7.
Specifications
Common questions
Are the written reviews from the UK?
The star line is 4.4 from 3,390 on the amazon.co.uk listing. The stored review texts are all marked Reviewed in the United States.
Is it paintable?
The bullets say superior paintability, interior or exterior use, and water clean-up. The full-cure field says 24 hours. No paint-hour count is in the listing.
What is the material?
The title says premium elastomeric acrylic latex. A details field says Rubber. Treat the title as the product type and the Rubber field as a conflicting line.
SX Siroflex is one white 310 ml acrylic cartridge at £4.99, the lowest single-tube price in this set, with 4.4 from 134 amazon.co.uk reviews. Seventeen UK texts praise an easy bead on new skirting, a quick dry, and paint over the bead. The bullet says you can overpaint with water-based and synthetic paints, with no primer on most surfaces, and that clean-up is soap and water. No skin time or full-cure field is on the listing. Several deliveries arrived without a nozzle. One review quotes an interior-and-exterior claim from a 380 ml title, so some comments may be about a different size. The number-of-items field says 25, which does not match the £4.99 price, the 570 g weight, or the content bullet of one cartridge. It is the best value when you need one named white UK tube and you already have a nozzle.
Pros
Cons
Best for: One room of white skirting when you already own a gun and can spare a nozzle if the cap arrives empty.
Less suitable: A whole-house multipack, or a buyer who needs a printed paint window before they start.
Specifications
Common questions
Is this one cartridge or a box of 25?
The content bullet and included components say one 310 ml cartridge. Weight is 570 g and the price is £4.99. The number-of-items field says 25, which does not match those lines.
Can you paint it?
The bullet says it can be overpainted with water-based and synthetic paints, with no primer on most surfaces, and that clean-up is soap and water. No skin time or full-cure field is on the listing.
What do UK reviews complain about?
Seventeen UK texts praise flow and painting on skirting. The repeated fault is a missing nozzle. One review quotes a 380 ml interior-and-exterior title, so some comments may be about a different size.
This ebuyergate bundle puts two 290 ml white Soudal tubes, a black steel gun, and four silicone tools in one box at £12.99. The star line is 4.4 from 3 reviews, and the stored notes contain one UK text, which calls it a starter kit for new skirting and architrave and says the gun was easy to use. That is one household, not a pattern. The bullets do not give a paint time, even though a customer asks whether the caulk is paintable. The brand field is ebuyergate and the origin is China, while the tubes are named as Soudal. A unit-count field of 1.0 ml conflicts with two 290 ml cartridges. Surfaces include sink and tub, which is not a sanitary class. The Soudal white twin without a gun is the same sealant idea with 1,051 reviews.
Pros
Cons
Best for: A one-room starter box if you accept a review count of three and you want Soudal tubes with tools.
Less suitable: A jobbing decorator, or anyone who wants more than one written review of the gun.
Specifications
Common questions
Whose name is on the listing?
The brand field is ebuyergate and the origin is China. The included components are two Soudal caulk tubes, a black gun, and four silicone tools.
Does it say you can paint the caulk?
A customer question asks if it is paintable. The bullets call the tubes Soudal acrylic caulk for gaps in walls, doors, and woodwork, but they do not give a paint time.
How many reviews are written out?
The star line says 4.4 from 3. One stored UK review calls it a starter kit for new skirting and architrave and says the gun was easy to use.
The Swiflee kit is two 290 ml white cartridges, an 11-inch steel gun, and smoothing tools at £16.99, with 4.2 from 182 UK reviews. Across 38 stored texts the caulk itself is called fine and useful on stair cracks, and it wipes with a damp cloth. The listing does not give a paint time. Water resistance is only the words water resistant. The repeated fault is the gun: the handle or trigger snapped on first use in multiple reviews, and one rod bent after half a tube so the gun stopped driving. One review calls that break a cut risk. Several buyers say a separate gun would have been cheaper. The kit suits a first box only if you accept that the reviews are about the gun, not a better sealant.
Pros
Cons
Best for: A first skirting job only if you treat the included gun as a gamble and keep another gun in the house.
Less suitable: Anyone who already owns a gun, or a wet joint around a sink or bath.
Specifications
Common questions
What is in the box?
The bullet says two 290 ml white decorator cartridges, one sealant gun, and a silicone smoothing-tool set. Interior jobs named are doors, windows, woodwork, stairs, walls, and ceilings.
Does the listing say it is paintable?
The title calls it decorator caulk. The bullets do not state a paint time. Water resistance is Water resistant. A customer question asks if it is waterproof; the listing does not answer that with a class.
What do the UK reviews say about the gun?
Across 38 UK reviews, gun failures dominate: trigger or handle snapping on first use, and a rod that bent after half a tube. Comments on the caulk itself are milder and often positive.
Seven amazon.co.uk listings, with prices saved on 19 October 2026, were scored from 0 to 100. The star rating is scaled to 75: stars divided by 5, times 75, then half-up. A review-count band adds 15 at 10,000 or more, 11 at 1,000 or more, 7 at 300 or more, 4 at 100 or more, and nothing below 100. Cartridge adjustments sit in the remaining 10: plus 3 for a named UK trade acrylic (Everbuild/Sika, Soudal, or Siroflex), minus 4 when UK reviews are mainly about a kit gun failing, and minus 20 when the review count is under 20. A thin file can therefore fall well below a simple sum of the three weights. The top pick is the highest score, once. Best value is the lowest spend for one named white UK cartridge, once, and that rule is separate from the score. A 15-minute full-cure field is treated as tack, not a through-cure. This is not a laboratory test.
Star rating
75%amazon.co.uk stars divided by 5, times 75, then half-up to a whole number. A 4.5 and a 4.7 are not the same starting point, and the star line is the largest part of the score.
Review-count band
15%15 points at 10,000 reviews or more, 11 at 1,000 or more, 7 at 300 or more, 4 at 100 or more, and none below 100. A 4.7 from 364 reviews is not scored above a 4.5 from 11,926.
Cartridge adjustments
10%Plus 3 when the cartridge brand is Everbuild/Sika, Soudal, or Siroflex. Minus 4 when UK reviews are mainly about a kit gun failing. Minus 20 when the review count is under 20. The weight of 10 is the share left in this 100-point split. The minus 20 can pull a score below that share.
Buy decorator's caulk for a gap you will paint, not for a joint that stays wet. Seven amazon.co.uk listings were scored from the saved pages of 19 October 2026. White acrylic cartridges and twins are the core. A six-pack whose colour field says clear is a different buy. A gun kit adds tools, not a better sealant. The top pick and the best value are named from those scores. Neither result is a laboratory test.
Decorator's caulk is a water-based acrylic cartridge sealant for gaps that will be painted. Typical joints are skirting to wall, architraves, coving, window boards, and small cracks in sound plaster. UK buyers here are DIY decorators and jobbing painters who want a white, paintable bead. Silicone for a wet room is a different buy, set out in the [caulk or silicone](/hub/painting-supplies/decorators-caulk/sub/decorators-caulk-vs-silicone) guide.
A tack time is not a through-cure. Caulk Once can be overpainted in about 1 hour on the bullet and on the Sika sheet, while full cure on that sheet is 3 to 5 days. The Amazon field of 15 minutes repeats the tack line. Keep the bead thin.
Painted trim wants decorator's acrylic. A joint that stays wet wants a sanitary sealant. A bullet that says water resistant is not that class. Caulk Once is not for constant immersion, and the SX sheet is not for continuous water.
The Swiflee reviews are mainly about the gun breaking. The ebuyergate box has two Soudal tubes and a review count of three. Neither kit is scored as a higher-spec sealant than the cartridge on its own.
Painted interior trim needs decorator's acrylic. A joint that stays wet needs a sanitary sealant. EN 15651-1 F-INT is an interior façade joint. Sanitary work is part 3. Do not assign an EN class to an Amazon page that does not show it. A bullet that says water resistant is not that class. Caulk Once on the Sika sheet is not for constant immersion, bitumen, or floors. The SX sheet is not for continuous water. The paint window is not the through-cure.
White is the decorating default. The Soudal six-pack colour field says clear, and the browse line sits in Silicone Caulk. Buy that pack only when the photo matches a clear or stained joint. It is 4.7 from 364 reviews at about £11.73. Red Devil 0770 is one white 10.1 fl oz acrylic latex tube at about £11.95. The star line is 4.4 from 3,390 on amazon.co.uk. The stored texts are marked as reviewed in the United States. Do not read them as British buyers.
Three typical situations, each with a recommendation from this comparison.
You are painting one room and you already own a gun. SX Siroflex is one white 310 ml cartridge at about £4.99, with 4.4 from 134 UK reviews. The bullet says you can overpaint with water-based and synthetic paints. Several deliveries arrived without a nozzle, and the listing has no skin time.
You will use more than one tube on white skirting and frames. The Everbuild Caulk Once twin is about £5.38, about £2.69 a tube if you use both, with 4.5 from 11,926 reviews and a 1 hour paint window on the bullet. The 15-minute full-cure field is the tack line, not the sheet's 3 to 5 day cure.
You are sealing painted trim for the first time, and the limits matter more than another brand. The Soudal white twin at about £6.18 states a 10 mm gap and a 20 minute initial hardening, with 4.6 from 1,051 reviews. Keep the bead thin. Do not use it on a bath. A kit gun is not the first lesson.
The top pick is the Everbuild Caulk Once white twin at about £5.38. It is the highest score, 86 out of 100: 4.5 from 11,926 amazon.co.uk reviews, tack about 15 minutes, and overpaintable in 1 hour on the bullet. The full-cure field of 15 minutes repeats that tack line, and some deliveries arrived without a nozzle. The best value is SX Siroflex at about £4.99, one named white 310 ml UK cartridge with 4.4 from 134 reviews and the lowest single-tube price in this set. Nozzles were missing on more than one delivery, and the listing has no skin time. None of these scores is a laboratory test. A water-resistant bullet is not a bath or shower class.
SX Siroflex 310 ml
Best value as the lowest spend for one named white UK cartridge, about £4.99, with 4.4 from 134 reviews and no printed skin time.
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 sources used for this comparison. Listing prices, stars and review counts are the amazon.co.uk figures saved for this set on 19 October 2026.
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 saved on 19 October 2026. We did not run a lab test.
