The best clear silicone sealants, compared.
Top pick: Bond It HA6 RTV silicone, clear, 3 pack Best value: Bond It HA6 – Best-value single cartridge in this set: about £4.95, 4.6 from 4,904 reviews, with EN 15651-1 and EN 15651-2:2012 on the listing. Updated 22 October 2026.
Clear silicone is a moisture-curing joint sealant that stays transparent. In the UK you buy it for baths, showers, basins, glass and small repairs where a white bead would show. A wet-room joint, a short touch-up and aquarium glass are different jobs, and they do not share one cartridge. A suitable tube states the duty: a fungicide on a shower bead, a movement class and a pack count that matches the listed weight. Most trade clear silicones of this type smell of vinegar while they cure and are not paintable. A fungicidal bathroom silicone and a fungicide-free marine silicone can look the same in the cartridge. The [clear silicone buying guide](/hub/fillers-adhesives-and-sprays/silicone-clear/sub/silicone-clear-buying-guide) puts job, fungicide, movement and pack ahead of price. Skin forms in minutes, and depth cures at about 2 mm per 24 hours. A one-hour shower claim belongs to one product line, not to every cartridge. Read the tube count, not only the photograph. Neutral-cure clear silicone is a different chemistry. Ventilate while the bead cures, and do not treat a dry skin as a full cure.
Clear silicone is a moisture-curing joint sealant that stays transparent. In the UK you buy it for baths, showers, basins, glass and small repairs where a white bead would show.
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Personal buying guide
Question 1 of 2
What are you sealing?
Three clear Bond It HA6 cartridges at about £11.00 score 4.7 from 749 amazon.co.uk reviews, the highest star line in this set. Reviewers used the pack on aquariums and a large fish tank, and one note says three tubes covered two 4 ft vivariums with silicone left over. A buyer left the vivarium 48 hours before fitting lights. The listing states initial hardening of 2 minutes and a full cure of 24 hours, with a 310 ml liquid volume and a unit count of 930 ml across the three packs. The vinegar smell made one person's eyes water on a terrarium job, and it is hard to get off your fingers. One review said it did not seal a plastic pond liner and was slow to dry. A reviewer, rather than the specification, says to keep animals away while it cures. This is the top pick when you will actually use three HA6 cartridges, not the automatic choice for a bath.
Pros
Cons
Best for: You are sealing more than one aquarium or vivarium and you will use three HA6 cartridges.
Less suitable: A single small bath repair, a plastic pond liner, or a mould-resistant sanitary bead.
Specifications
Common questions
Is it described as safe for fish?
The title says marine, aquarium safe, and fish tank. The listing asks whether it is safe for fish and does not add a separate answer.
What cure times are stated?
Initial hardening time is 2 minutes. Full cure time is 24 hours.
How much silicone is in the pack?
Number of packs is 3. Liquid volume is 310 ml. Unit count is 930 ml.
The Bond It HA6 clear cartridge at about £4.95 scores 4.6 from 4,904 amazon.co.uk reviews, and the title is the marine and aquarium line in this set. Reviewers used it on fish tanks, including a repair on a 120 litre tank, on a gargoyle gecko vivarium, to stick perspex in a pond filter and to mend a birdbath. They say it holds once it has cured. The listing cites EN 15651-1 and EN 15651-2:2012, and it does not state a fill volume. A fungicide question on the page is unanswered, which fits a marine silicone rather than a sanitary anti-mould tube. The vinegar smell is strong until it dries, one reviewer's eyes watered, and at least one cartridge arrived without the nozzle tip. At this price and review count it is the best-value single cartridge here, for glass that the title names, not for a mould-resistant shower bead.
Pros
Cons
Best for: One cartridge of clear HA6 for aquarium or vivarium glass, when you can ventilate the vinegar smell.
Less suitable: A mould-resistant shower bead, or a buy that needs a printed fill volume.
Specifications
Common questions
Does the listing say it is safe for fish tanks?
The title says marine, aquarium safe, and fish tank. A separate fungicide answer is not on the listing.
Which standard is stated?
The listing states EN 15651-1,2:2012.
Is a volume given?
No. Unit count is 1. Volume is not stated.
The Everbuild clear pack titled as twelve tubes is about £28.98 and scores 4.6 from 441 amazon.co.uk reviews. Reviewers who already buy Everbuild say it does the job when you apply it with care, and the listing states anti-fungal behaviour plus movement of plus or minus 12.5 percent to EN 15651-1. The title says 12; the number of packs and the unit count say 1, so the live count has to be checked before about £28.98 is treated as a bulk price. One review title says the pack was smaller than expected and tells you to check the sizes. Another says a tube left in a shed or garage over winter needs frost protection. The colour field is blank even though the title says clear. No repeated leak or cure-failure complaint shows up in the reviews that were read.
Pros
Cons
Best for: You will use several cartridges of this general-purpose clear silicone and you have checked that twelve tubes are what will arrive.
Less suitable: A single small repair, or a purchase that treats the unit count of 1 as a typo without looking.
Specifications
Common questions
How many cartridges are in the pack?
The title says 12. Number of packs and unit count say 1. Check the live pack count before you rely on twelve.
Is a movement figure stated?
Yes. The listing states movement accommodation of plus or minus 12.5 percent to EN 15651-1.
What colour is listed?
The colour field is blank. The title says clear. The colour specification is not stated.
Six clear Everbuild general-purpose cartridges are listed at about £20.11, with an item volume of 280 ml and a score of 4.6 from 121 amazon.co.uk reviews. Reviewers say it is easy to use, good value when it is on offer, and that it makes a watertight seal as it starts to dry. One buyer used it to fit bathroom wallboard, and longer-term users call it one of the better sealants they keep buying. The pack is marked waterproof. Fungicide and movement are not stated on this listing, unlike the anti-fungal and plus or minus 12.5 percent lines on the twelve-pack title in the same family. One review calls the silicone too thin. There is no reseal cap, so leftover silicone dries between uses. The image file in the product data matches the twelve-pack listing, so check the pack count on the page you are paying for.
Pros
Cons
Best for: You need several general-purpose clear cartridges and you have checked that this page is selling six.
Less suitable: An aquarium, or a buy that needs the anti-fungal and plus or minus 12.5 percent lines printed on this particular listing.
Specifications
Common questions
How many cartridges, and what volume?
Item package quantity and number of pieces are 6. Item volume is 280 ml. Container type is cartridge.
Is it waterproof?
Yes. Water resistance and the special-features field both say waterproof.
Is a fungicide or movement class stated?
No. Fungicide and movement are not stated on this listing.
The Soudal Trade clear listing at about £12.95 scores 4.6 from 32 amazon.co.uk reviews, and the eight written notes in the file are short. Buyers say it matches the description, is easy to apply, and, in one case, is good value. A bullet says it contains a fungicide, stays flexible after curing, and suits glass, metals, wood and ceramic tile. The title says a 6 pack and the part number ends in X6, while the item count is 1 and the weight is 310 g, which reads as one cartridge. Paintable is asked on the listing and not answered. Do not divide about £12.95 by six until the live pack count and the weight agree. There is no repeated defect in those eight reviews, and there is also no long account of a wet-room joint.
Pros
Cons
Best for: You want this Soudal Trade clear silicone and you will check how many tubes the live page is actually selling.
Less suitable: Anyone pricing about £12.95 as six cartridges, or a fish tank.
Specifications
Common questions
Is this a six-pack?
The title says 6 pack and the part number ends in X6. Number of packs, unit count, and number of items say 1, and the weight is 310 g.
Does the listing say it is paintable?
The listing asks whether it is paintable and does not answer. Whether it is paintable is not stated.
Does it contain a fungicide?
Yes. A listing bullet says it contains a fungicide to resist mould growth.
Across 7,669 amazon.co.uk reviews, the Everbuild clear cartridge at about £6.00 is the general-purpose tube people use on baths, sinks and small outdoor jobs. Reviewers describe a neat clear finish on a bath and a sink, and outdoor notes cover a shed, a gate strip and a wall light that held after rain. The listing is anti-fungal, marked for interior and exterior, and it tells you to use a cartridge gun. The title says 260 ml and the unit count says 280 ml, and the item weight is listed at 172 g, which does not by itself confirm a full cartridge. One outdoor review says it shrinks and that adhesion is limited unless you apply it liberally, while calling it fine indoors. It is slightly messy in ordinary use, and several buyers say they bought more than the job needed. The maker's sheet, not this star line, is what rules it out for aquarium manufacture.
Pros
Cons
Best for: A kitchen or bathroom joint, or a small exterior gap, when you already own a sealant gun.
Less suitable: Aquarium manufacture, or a double-glazed unit edge or uPVC perimeter the Everbuild sheet excludes.
Specifications
Common questions
Is it for showers and outdoors?
The surface recommendation is shower, and the highlight says interior and exterior. Bullets cover sinks, showers, baths, toilets, worktops and laminates.
Do I need a sealant gun?
Yes. The listing says to apply it with a cartridge gun.
Which volume is stated?
The title says 260 ml. The unit count says 280 ml.
EVO-STIK Stay Clear is a 290 ml sanitary cartridge at about £7.91, scoring 4.5 from 587 amazon.co.uk reviews. The listing says it will not stain, blacken or yellow, that it stops mould, and that full cure is 24 hours. It is aimed at tiles, baths, shower trays, basins, worktops and stainless steel sink-tops. Reviewers describe a thin body that flows into cracks and tools with a wet finger, and one person used it on the outside of windows. It is easy to make a mess because it is thin, one order arrived without a nozzle, and one review talks about the bead staying white, which does not match a clear cartridge. Paintable is not answered on the listing. The maker's own page, rather than these stars, is what warns that soap film can sit over a fungicide.
Pros
Cons
Best for: A clear sanitary bead on tiles, a bath, a basin or a sink-top, when you can tool a thin sealant neatly.
Less suitable: A fish tank, a joint you intend to paint, or a deep bead you will treat as cured because the skin feels dry.
Specifications
Common questions
Will the listing say it stays clear?
Yes. The bullets say it will not stain, blacken or yellow, and the highlight says it stays clear.
Where is it meant to be used?
Around tiles, baths, shower trays, basins, kitchen worktops and stainless steel sink-tops. The surface recommendation is shower.
What cure time is stated?
Full cure time is 24 hours. An earlier ready-to-use claim is not on this listing.
The 151 clear tube is 70 g at about £4.75 and scores 4.4 from 7,078 amazon.co.uk reviews, which is a large file for a small pack. Reviewers use it for short repairs, a sink drain, a letterbox and a refresh of a bath seal, and they treat the size as the reason to buy it. It is a squeeze tube, so it does not need a gun, and the listing marks it waterproof for a bathtub, shower, tile and wall. The metal tube creases, including on delivery, and it is awkward to store once it has been opened. The nozzle needs cleaning with white spirit between uses, and the silicone is hard to get off your hands. One reviewer expected a bright white bath seal from a listing that is clear. Outdoor use is asked and not answered, and neither a fungicide nor a cure time is stated.
Pros
Cons
Best for: A short clear repair where a full cartridge would be left to harden in the nozzle.
Less suitable: A full shower reseal, a fish tank, or outdoor work the listing does not answer.
Specifications
Common questions
Is this a cartridge?
No. It is a 70 g tube, so it does not need a cartridge gun.
Which surfaces does the listing name?
Compatible material is ceramic. The surface recommendation is bathtub, shower, tile and wall.
Can it be used outdoors?
The listing asks and does not answer. Outdoor use is not stated.
The EVO-STIK 1 Hour clear sealant is about £6.49 and scores 4.4 from 641 amazon.co.uk reviews. The listing says it is ready to use in one hour, contains a fungicide, and is meant for baths, showers, trays, basins, worktops and stainless steel sink-tops. Reviewers call it easy and fast, one person sealed a bath while sitting in it because of a gap, and another stuck a glass appliqué. It is very sticky and easy to smear, there is no cap once the nozzle is trimmed, and one reviewer saw little difference in setting time against other sealants. One order arrived with no nozzle. The title says 290 ml and the unit count says 310 ml. The one-hour line is this listing's ready-to-use claim, not a measured full cure; one review expected a full cure within 24 hours.
Pros
Cons
Best for: A shower or bath joint where the one-hour ready-to-use claim is the reason you are buying.
Less suitable: A fish tank, or a deep bead you will treat as fully cured after one hour.
Specifications
Common questions
When does the listing say it can be used?
The highlight says ready to use in 1 hour. It also says the sealant is fast setting and stops mould.
Is it for kitchen surfaces?
Yes. Bullets include kitchen worktops and stainless steel sink-tops, as well as baths and showers.
Which volume is stated?
The title and contents line say 290 ml. The unit count says 310 ml.
Across 914 amazon.co.uk reviews, the ADVANCEDSIL tube at about £8.99 is a 120 ml squeeze pack for small kitchen and bathroom gaps, sold with a finishing tool. Reviewers use it for touch-ups around a kitchen, a bathroom, a utility floor and a window, and several say the tool helps tidy the line. A cap and a bottom key are described as helping to empty the tube and close it again. The listing calls it waterproof and mould-resistant, and it states no movement class and no cure time. The tube is small beside a cartridge, the smell is strong in a small room, and once it has set the rest cannot be squeezed out. Heat resistance and window use are asked on the listing and left unanswered. Treat it as a short clear repair with a tool in the box, not as a stated sanitary class.
Pros
Cons
Best for: You have a short kitchen or bathroom gap and want a squeeze tube with a finishing tool.
Less suitable: A full bath reseal, a fish tank, or a joint that needs a stated movement class.
Specifications
Common questions
Does this need a cartridge gun?
No. It is a 120 ml squeeze tube, and the listing includes a finishing tool.
Is it for kitchens and bathrooms?
The listing describes a clear seal for kitchen and bathroom joints, and says it is waterproof and mould-resistant.
Is it heat resistant, and can it be used on windows?
The listing asks both questions and does not answer them. Heat resistance and window use are not stated.
The Soudal Trade clear three-pack is about £12.31 and scores 4.1 from eight amazon.co.uk reviews, with four written notes in the file. One says it arrived as ordered. Another applied it on a conservatory roof and, so far, reports that it is holding in full sun. Two reviewers say the main photo shows four tubes and that three arrived, and they call the picture misleading once the price is for three. The specification does say three packs, the weight is 1.14 kg, and a bullet lists a fungicide for glass, metals, wood and ceramic tile. Paintable is asked and not answered. Eight reviews is a thin sample next to the Everbuild and HA6 files, so the star line cannot carry a wet-room decision on its own.
Pros
Cons
Best for: You want three Soudal Trade clear cartridges and you are buying the count in the specification, not the count in the photo.
Less suitable: A fish tank, or a purchase priced as four tubes because of the picture.
Specifications
Common questions
How many tubes are in the pack?
Number of packs and number of items say 3. Two reviews say the main photo shows four tubes and three arrived.
Does the listing say it is paintable?
The listing asks and does not answer. Whether it is paintable is not stated.
Does it claim a fungicide?
Yes. A bullet says it contains a fungicide to resist mould growth.
Eleven amazon.co.uk clear silicone listings were scored on a 0–100 scale from the 19 October 2026 snapshot. Amazon stars and review count were 45 points, whether the listing states the duty was 25, and price against this set was 20. Those three weights are published here as 50, 28 and 22 so they sum to 100. Deductions of up to 15 points sit beside the weights and are described under the first criterion. The highest score is the top pick. The best-value single cartridge is the separate value award. The two-point gap between the three-pack and the single cartridge of the same silicone is that split, not a claim that three tubes are a different product. The order follows the listings. This is not a laboratory test.
Amazon stars and review count
50%A 4.6 to 4.7 with hundreds of reviews sits in the low 90s on the raw scale. A 4.1 from eight reviews sits at the bottom. A 4.3 from 914 reviews does not outrank a 4.6 from several thousand. Deductions of up to 15 points cover a title that disagrees with the item weight or the unit count, a photo that reviewers say shows more tubes than arrived, a review count under 15, and a colour comment that does not match a clear bead.
Stated duty
28%A fungicide line, an EN 15651 reference, a cure time, or an aquarium title counts. A blank standard does not.
Price against this set
22%A single cartridge under £7 scores higher here than a £20 to £29 multipack of the same silicone.
Match the job before the price. A shower bead, a short repair and aquarium glass do not share one cartridge. A fungicide, a movement class and a pack count that matches the weight matter more than a star rating in a narrow band.
Clear silicone sealant is a moisture-curing joint sealant that stays transparent. UK shoppers use it where a white bead would show: baths, showers, basins, glass and small repairs. A smaller group seals aquarium or vivarium glass. A fungicidal bathroom silicone and a fungicide-free marine silicone are different products even when both look clear. Neutral-cure clear silicone is sold in the UK and is not what these acetoxy cartridges are. Choose the job first.
A fungicidal bathroom cartridge and a marine silicone can both look clear. Everbuild general-purpose silicone is not for aquarium manufacture. HA6 is the specified aquarium silicone in this set.
Two reviews of the Soudal three-pack say the photo shows four tubes. The Soudal title that says six has an item weight of 310 g. Read the specification, not the picture.
The trade sheets for the identified products are acetoxy and not paintable. Do not lay fresh silicone over old silicone, and do not treat a dry skin as a full cure. Depth is about 2 mm per 24 hours.
A sanitary wet joint, a short touch-up and aquarium glass are different jobs. A shower bead wants a fungicide. Aquarium glass wants a silicone specified with no fungicides or oils that might leach. Acetoxy silicone grips glass and glaze, smells of vinegar while it cures, and needs ventilation. Avoid natural stone, bitumen, lead and a double-glazed unit edge unless the sheet allows that substrate. The identified trade sheets are not paintable.
Everbuild general-purpose silicone publishes plus or minus 12.5 percent to EN 15651-1. Stay Clear and Soudal Trade Multi-Purpose publish plus or minus 25 percent on their sheets. One cartridge is about 10 metres of a 6 mm bead. A 70 g tube is a repair. Skin forms in minutes and depth cures at about 2 mm per 24 hours. A one-hour shower claim is one listing, not the category.
Three typical situations, each with a recommendation from this comparison.
You will use three cartridges on aquarium or vivarium glass. The Bond It HA6 three-pack is the top pick at about £11.00, 4.7 from 749 reviews, with a stated 24-hour full cure. One review covered two 4 ft vivariums. It did not seal a plastic pond liner, and a fungicide is not stated.
You need one cartridge of that HA6 silicone and you can ventilate the vinegar smell. The single cartridge is the best value at about £4.95, 4.6 from 4,904 reviews, with EN 15651-1 and EN 15651-2:2012 on the listing. The fill volume is not stated. It is not a fungicidal shower bead.
The joint is a bath, basin, tray or sink-top and you want the bead to stay clear. EVO-STIK Stay Clear is about £7.91, 4.5 from 587 reviews, with a mould line and a 24-hour full cure. It is thin and smears. It is not a fish-tank silicone.
The top pick is the Bond It HA6 three-pack at about £11.00: 4.7 from 749 amazon.co.uk reviews, the highest stars in this set, with a stated 24-hour full cure. It is the pick when you will use three HA6 cartridges on aquarium or vivarium glass, not the shower winner. The best value is one HA6 cartridge at about £4.95, 4.6 from 4,904 reviews, with EN 15651-1 and EN 15651-2:2012 on the listing. It is not a fungicidal bath bead. The two-point gap is the award split, not a claim that three tubes are a different silicone. Everbuild general-purpose clear at about £6.00 has the largest review file and does not receive a second award. This order is the listing order. It is not a laboratory test.
Bond It HA6
Best-value single cartridge in this set: about £4.95, 4.6 from 4,904 reviews, with EN 15651-1 and EN 15651-2:2012 on the listing.
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. amazon.co.uk prices, stars and review counts were taken from the listings on 19 October 2026.
Expert source (DIY & tools): Charlie White (Charlie DIYte) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
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.
