Independent comparisons. We may earn from shop links. More info

Soudal silicone for a bathroom

Updated: 23 October 2026

You are resealing a bath, a basin or a shower tray in a UK bathroom, and the tube in the basket says Soudal silicone with a line about mould. That line is not a promise of a mould-free shower. In this comparison a fungicide bullet on a general multipack is a different product from Soudal’s sanitary silicones, which are not among the eight listings. The cartridges, prices and ratings are on the [Soudal silicone comparison](/hub/fillers-adhesives-and-sprays/soudal-silicone). How the bead is cut, gunned and tooled sits on the how-to page. A qualifying purchase can earn a commission at no extra cost to you.

You are resealing a bath, a basin or a shower tray in a UK bathroom, and the tube in the basket says Soudal silicone with a line about mould. That line is not a promise of a mould-free shower.

Our top picks

Soudal Trade multi-purpose white 6-pack

Best overall

Soudal Trade multi-purpose white 6-pack
7.6/10about £21.28
View offer
Soudal Silirub LMN white 300 ml

Rank 2

Soudal Silirub LMN white 300 ml
9.3/10about £8.20
View offer
Soudal Trade multi-purpose white 3-pack

Best value

Soudal Trade multi-purpose white 3-pack
8.0/10about £12.30
View offer
On this page
  1. 1.What a bathroom joint is asking for
  2. 2.What these listings actually say
  3. 3.Ceramic, acrylic, and stone
  4. 4.When to leave this comparison

What a bathroom joint is asking for

Most bath and basin joints are splash joints. Water runs across them and then drains. They are not under water for hours. A shower tray edge is the same idea until the tray holds a puddle against the bead. None of these listings states aquarium use or continuous immersion. What the joint does ask for is a flexible seal, a colour you can live with, and some resistance to mould on soap film. Soudal’s Trade Multi-Purpose sheet names the joint between a wall and a bath or shower tray, and it declares a fungicide. A 2018 declaration classes that named trade product as a sanitary sealant of type S, class S1. That class is not printed on these Amazon files, so a multipack is not “S1” because a PDF exists. A fungicide slows mould on the bead. It does not clean the tile.

What these listings actually say

Five trade multipacks carry a fungicide bullet and name ceramic, glass and wood. They do not print Stay Fresh, sanitary or S1. The white 6-pack at £21.28 is the one a reviewer used on a shower and a bath. The white Silirub LMN 300 ml at £8.20, with 4.5 from 118 ratings, does not name a fungicide. One reviewer sealed a leaking bath-to-tile joint. A separate review says the bead discoloured. Those are single reviews, not a mould trial. The large UK sample and a named neutral cure point at the white LMN single. The fungicide sentence points at the trade multipacks, with the cure left blank. Stay Fresh and Trade Sanitary are the sanitary tubes, and neither is an ASIN in this set.
Soudal Trade multi-purpose white 6-pack

Testsieger

Soudal Trade multi-purpose white 6-pack
7.6/10about £21.28
View offer

Ceramic, acrylic, and stone

Ceramic tile is the substrate the trade bullets and the bath reviews describe. On acrylic, a blade can score the bath and a wide smear can leave the corner empty. A uPVC panel is a neutral-cure question. The trade sheet does not treat PVC as a reliable substrate, so read the neutral cure or acetoxy silicone page before you gun an unnamed multipack in a small room. Family criteria are on the Soudal silicone buying guide. Marble and granite are out: Soudal says the staining is permanent. White and brilliant white are the bathroom colours here. Clear is the LMN choice where a white line would flash on glass. Acetoxy paste smells of vinegar while it cures. Neutral LMN is quieter and still not odourless. Open a window either way.

When to leave this comparison

Leave these eight listings when the shower stays humid and you want a product Soudal names as sanitary. That is Stay Fresh beside uPVC, or Trade Sanitary on glass and ceramic if you can ventilate an acetoxy cure. Neither is in this table, so this page will not invent a price or a star rating. Leave the set for marble or granite, and when the tray or a sealed unit stays under water or has failed as a unit. A fungicide bead will not reseal a dropped tray. If you stay, the practical pair is the white LMN single for the review sample and a named neutral cure, and the white trade 3-pack at £12.30, with 4.4 from 33 ratings, when you want three tubes, a fungicide bullet, and a count the specification agrees. Those reviews do not yet say how long the fungicide lasts.

Common questions

Can I use the trade multipack on a ceramic bath?
The trade sheet names the joint between wall and bath or shower tray, and the bullets name ceramic and a fungicide. A reviewer used the white 6-pack on a shower and a bath. The Amazon pages do not name the cure. That is acceptable for ceramic if you ventilate. It is a poor match for a uPVC panel.
Is the fungicide enough for a shower?
It is a mould inhibitor on a general silicone, not a lifetime mould-free guarantee. Soap film and a ridge that holds water will still mark the joint. Stay Fresh and Trade Sanitary are the sanitary products, and they are not in this comparison.
What if the surround is marble?
Do not use these cartridges. Soudal states that silicone oil stains marble and granite and that the mark is permanent. You need a sealant sold for natural stone, which is outside this set.
Acetoxy or neutral in a small bathroom?
Neutral if the joint touches uPVC or you cannot ventilate. The three LMN listings name neutral. A silent trade multipack should be treated as the acetoxy sheet until the cartridge says otherwise. Even LMN reviewers reported a smell, so open a window.
Can it seal an aquarium or a tray that stays under water?
No listing in this set states aquarium use or continuous immersion. A splash joint at a tray edge is in scope. A joint that stays submerged is not.

Related pages

How to apply Soudal silicone

Best Soudal silicone

Soudal silicone

Soudal silicone buying guide: cure, colour and pack

Neutral cure or acetoxy silicone: which Soudal tube

Sources

Public UK sources used for this comparison. Prices, stars and review counts are the amazon.co.uk figures stored for these eight listings. This order is the listing order, not a laboratory test.

  1. Silirub LMN technical data sheet (retrieved 22 October 2026)
  2. Silirub LMN UK declaration of performance (retrieved 22 October 2026)
  3. Trade Multi-Purpose Silicone technical data sheet (retrieved 22 October 2026)
  4. Trade Multi-Purpose declaration of performance (retrieved 22 October 2026)
  5. Soudal UK paint FAQ (retrieved 22 October 2026)
  6. Soudal UK natural-stone FAQ (retrieved 22 October 2026)
  7. GOV.UK construction-product marking table (retrieved 22 October 2026)
  8. Consumer Rights Act 2015 section 11 (retrieved 22 October 2026)