Best white silicone sealant for the job in front of you
Updated: 23 October 2026
Star ratings run from 4.0 to 4.7 where a line exists, and one listing has none, so the best white silicone sealant here means best for a stated job. A bath, a short repair and a frame do not share a winner. The [Silicone white comparison](/hub/fillers-adhesives-and-sprays/silicone-white) gives Sika sanitary the top pick and Sika general purpose the best value. Neither award makes that tube the frame silicone. Prices are the 21 October 2026 snapshot. A qualifying purchase through our amazon.co.uk links can earn us a commission at no extra cost to you.
Star ratings run from 4.0 to 4.7 where a line exists, and one listing has none, so the best white silicone sealant here means best for a stated job. A bath, a short repair and a frame do not share a winner.
Star ratings run from 4.0 to 4.7 where a line exists, and one listing has none, so the best white silicone sealant here means best for a stated job. A bath, a short repair and a frame do not share a winner. The Silicone white comparison gives Sika sanitary the top pick and Sika general purpose the best value. Neither award makes that tube the frame silicone. Prices are the 21 October 2026 snapshot. A qualifying purchase through our amazon.co.uk links can earn us a commission at no extra cost to you.
Our top picks
| Badge | Product | Job in this set | Stars and reviews | Cure on the listing | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Unibond UniBond Triple Protection silicone, white, 291 g | Bath with stated times | 4.6 from 4,120 | 20 min / 24 h | 9.4 | about £13.49 | View offer |
 Sika Sika sanitary silicone, white | White bath or shower | 4.5 from 10,620 | Not stated | 9.6 | about £7.69 | View offer | |
| Best value |  Sika Sika general purpose silicone, white | One general cartridge | 4.5 from 7,959 | Not stated | 9.4 | about £5.00 | View offer |
On this page
Why stars do not pick a winner
The highest star line is 4.7 from 24 reviews, on a Dowsil pair at about £18.99. The deepest file is 4.5 from 10,620 reviews, on a sanitary cartridge at about £7.69. A 4.6 from 32 reviews does not outrank that. B0HDTST6TY has no star line. This page uses the comparison counts, including 10,620 and 4,120, and does not mix in a later snippet. The top pick is the sanitary cartridge. The best value is the £5 general-purpose cartridge.
For a white bath or shower
For a white bath or shower, start with Sika sanitary, about £7.69, 4.5 from 10,620 reviews. The title says mould resistant. The title also says 295 ml and a bullet says 310 ml. There is no cap, and no EN class or cure time.
UniBond, about £13.49, prints touch dry in 20 minutes and fully dry in 24 hours. That mould line is the listing's claim, not a lifetime white bead. Dowsil 785, about £12.00, names acetoxy and a 24-hour full cure. The brand field says AIGHER and the manufacturer says Dow. Soap film is on the bathroom page.
For a short repair
For a tap or a short edge, the 151 tube is about £3.35, 70 g, 4.3 from 3,448 reviews, with a 24-hour cure and no gun. The metal tube can burst if you force it after the paste has started to dry. Reviewers cut the nozzle to about 1.5 mm. There is no fungicide, and the model number says 4x while the pack is one tube.
The Shopstop kit adds a tool and prints 70 g, 150 g and 140 g. The second 151 tube at about £6.99 has no reviews. A full bath still wants a cartridge.
For a white frame
Siroflex LMN is the only listing with a movement figure: 12.5 percent, 300 ml, about £6.99, 4.3 from 18 reviews. One review reports adhesion on a uPVC frame. The mould question is unanswered, and several reviews describe other colours, so check the cartridge. A 25 percent frame silicone is outside this set. Dow 796 at Screwfix was about £11.29 on 21 October 2026, and it is not one of these ASINs.
Sika general purpose at about £5.00 is the best value, with an EN 15651 line and no class digit. One cartridge was dated 20 May 2024. It is not a printed 12.5 percent frame product.
What to skip
Skip Enócilis at about £31.95, 4.0 from 19 reviews, if you need a bright white match. The colour field says yellow and white, and reviews describe a semi-transparent cure. Skip the Soudal packs when you need a stated volume or a class. The three-pack is about £12.30 with no cure time. The six-pack is about £21.28 with a 7-minute and 24-hour line, and still no volume. Do not borrow an S1 code from a different Soudal declaration. Skip the Dowsil two-pack if you only need white. A 4.6 from 32 reviews does not outrank a 4.5 from 10,620.
Common questions
Which white silicone in this set is for a bath?
Sika sanitary at about £7.69 is the top pick for a white bath, with 10,620 reviews and a mould-resistant title. UniBond at about £13.49 is the alternative when you want 20 minutes and 24 hours printed. None of the bath rows is a 25 percent frame silicone.
Is the 4.7 two-pack better than the 4.5 sanitary cartridge?
The 4.7 is 24 reviews on a white-and-clear pair at about £18.99. The 4.5 is 10,620 reviews on one sanitary cartridge at about £7.69. A higher star line on a thin sample does not beat a deep file that matches the job. Buy the pair only when you will use both colours.
Is the £5 general-purpose cartridge a false economy in a shower?
It can be. Sika general purpose at about £5.00 has an anti-fungal line and no class digit, and one reviewed cartridge was old stock. For a shower bead that has already gone black, the sanitary cartridge at about £7.69 is the closer match.
Which listing is the small repair, not a full bath?
The 151 tube at about £3.35, 70 g, 4.3 from 3,448 reviews. Reviewers use it without a gun on taps and short edges. The metal tube crumples. A whole bath is a cartridge job, and neither 151 listing states a fungicide.
Why skip the £31.95 box even though the price per tube looks low?
Because the colour is in dispute and the reviews are thin. Enócilis is 4.0 from 19 reviews. The colour field says yellow and white, and reviewers describe a semi-transparent white that is too thick to tool cleanly. A low price per tube only helps if the cured bead matches the white bath you are repairing. This file does not support that match.
What should you buy if the joint is a window, not a bath?
Siroflex at about £6.99 is the only row that states 12.5 percent movement and puts windows in the title. The file is 18 reviews, and some describe other colours, so check the cartridge. A 25 percent low-modulus uPVC silicone is outside this set.
Related pages
Sources
Public UK sources used for this comparison. amazon.co.uk prices, stars and review counts were taken from the listings on 21 October 2026.
- BSI, BS EN 15651-3:2017 sanitary sealants (retrieved 21 October 2026)
- GOV.UK construction products regulation in Great Britain (retrieved 21 October 2026)
- GOV.UK acetic acid general information (retrieved 21 October 2026)
- Sika Everbuild Everflex 500 bath and sanitary silicone (retrieved 21 October 2026)
- Sika Everflex 500 EN 15651-3 declaration of performance (retrieved 21 October 2026)
- DOWSIL 785 sanitary acetoxy silicone technical data sheet (retrieved 21 October 2026)
- Bostik SX Contractors LMN silicone technical data sheet (retrieved 21 October 2026)
- UniBond Triple Protection technical data sheet (retrieved 21 October 2026)
- Soudal UK, acetoxy and neutral silicones (retrieved 21 October 2026)
- Soudal UK, painting over silicone sealant (retrieved 21 October 2026)
- Screwfix, how to silicone a shower (retrieved 21 October 2026)
- Toolstation sealant buying guide (retrieved 21 October 2026)