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How to apply Beko silicone

Updated: 23 October 2026

The bath joint you cut out last year has opened again, and the new cartridge is already in the gun. Most of those failures are preparation, tooling or water on a soft bead. This is how to apply Beko silicone so the bead sticks to two clean faces, gets tooled before it skins, and stays dry for the cure that belongs to that cartridge. The [Beko silicone comparison](/hub/fillers-adhesives-and-sprays/beko-silicone) is the product table. Peter F., DIY and tools editor, used the maker’s joint notes and the amazon.co.uk listings dated 19 October 2026, not a site test. A qualifying purchase can earn us a commission at no extra cost to you.

The bath joint you cut out last year has opened again, and the new cartridge is already in the gun. Most of those failures are preparation, tooling or water on a soft bead.

Our top picks

Beko Beko food silicone 22701, transparent

Best overall

Beko Beko food silicone 22701, transparent
8.6/10about £15.80
View offer
Beko Beko PSS Premium sanitary, white

Rank 2

Beko Beko PSS Premium sanitary, white
6.0/10about £29.99
View offer
Beko Beko Pro4 Premium silver grey

Best value

Beko Beko Pro4 Premium silver grey
7.0/10about £14.99
View offer
On this page
  1. 1.Clear the joint before you open the nozzle
  2. 2.Beko’s order, including primer and smoothing agent
  3. 3.Depth, backer rod and the 1 mm line
  4. 4.How long to keep water off

Clear the joint before you open the nozzle

Old silicone is a release film. Fresh sealant does not weld to it, so a bead gunned over a shiny remnant lets go along the same line, often within a few months of showers. Cut the old bead out fully, including the thin smear in the corner, then wipe the slot with a dry cloth and a degreaser that will not leave soap behind. If the slot is still damp from a morning shower, wait. Water trapped against the flank is how the bond fails even when the surface looks clean. Check the date before you cut the nozzle. In reviews of the black Pro4 listing, tubes past the printed date did not cure or were already hard.

Beko’s order, including primer and smoothing agent

Beko’s joint guide is a preparation sequence. You want a backer so the bead cannot stick to the back of the joint, primer where the maker asks for it, a continuous gun pass, and a smoother that is not rinse water. On an acrylic bath, Beko calls for primer. Skipping that because another brand claims to stick to acrylic is how a neat bead lifts off a plastic rim. Cut the nozzle slightly narrower than the slot, at an angle, and gun in one pass. Stopping mid-joint leaves a notch that becomes the first leak. Tool immediately. Pro4 skins in about 15 minutes, the food line in about 5 to 10 minutes, and PSS in about 10 to 20 minutes. After the skin has formed you tear the surface instead of pressing the sealant onto the flanks. Beko points you to a smoothing agent rather than washing-up liquid. A finishing liquid must stay off the bond faces. Filling the bath before you seal is common UK practice and is not printed on Beko’s joint page. If you do it, empty the bath only after that cartridge’s own water-off time.
Beko Beko food silicone 22701, transparent

Testsieger

Beko Beko food silicone 22701, transparent
8.6/10about £15.80
View offer

Depth, backer rod and the 1 mm line

Beko’s 1 mm line is flank contact, not the depth of the joint. Trade guidance talks about a bead depth of about 5 mm to 6 mm or more, with a backer rod so the sealant sticks to two faces only. Three-sided adhesion tears a bead when the bath or the frame moves. On a 6 mm shower-tray gap, a backer that leaves a few millimetres of depth, then a bead that wets both flanks, can flex. A sausage that also sticks to the back of the slot will split. About 25% movement, on the Pro4 and food sheets, is a quarter of the joint width. Cure is millimetres a day: Pro4 about 3 mm, the food line about 2 mm, and PSS about 1 mm to 2 mm. A deep bead in a cold room is still soft in the middle when the surface feels dry. Do not load it the same afternoon.

How long to keep water off

PSS is described on the maker’s page as shower-proof after about two hours. That line is not on the Amazon PSS titles, and it does not transfer to Pro4 or the food line. Pro4’s cure of about 3 mm a day means a deeper bead needs longer than an afternoon. Ordinary UK sanitary guides often say at least 24 hours before a shower when the cartridge states no shorter time. The food line is taste-neutral after curing, not while it smells of vinegar. Reviews say that smell can last close to a week. The food-safe page sets that limit. Mould that returns is also a ventilation problem, which sits on the bathroom page. Stop and call a professional when the leak reaches a floor or a ceiling, when the joint needs fire-stopping, when you are sealing facade stone, or when damp comes back as soon as a new bead is in.

Common questions

Do I have to remove the old silicone?
Yes. New Beko silicone does not bond to the old bead. Cut it out, including the film in the corner, and let the slot dry. Gunning over a remnant is the usual reason a fresh joint opens along the same line.
Can I smooth it with washing-up liquid?
Beko points you to a smoothing agent rather than rinse water. Soapy water on the flanks weakens the bond, and dish liquid can yellow the bead. If you tool with a finger, keep the contact faces free of detergent.
When can I use the shower?
PSS is described by the maker as shower-proof after about two hours. That claim is not on the Amazon title, and it is not the wait for Pro4, which cures at about 3 mm a day. If your cartridge states no shorter time, a 24-hour wait is the cautious household rule from ordinary UK sanitary guides.
How deep should the bead be?
Beko’s 1 mm figure is contact on each flank, not the depth of the slot. Use a backer so the sealant bonds on two faces only. Trade practice is a depth of about 5 mm to 6 mm or more. A bead packed against the back of the joint tears when the two sides move.
When is this no longer a DIY job?
Call someone when water is reaching a floor or ceiling, when the gap is a fire compartment, when the joint is in facade stone, or when mould and damp return the moment the bead is replaced. Technique will not fix a leak path behind the bath.

Related pages

Beko silicone buying guide

Beko silicone

Beko silicone for bathroom joints: PSS versus Pro4

Best Beko silicone by the job, not by the star count

Beko food grade silicone: after cure, not while wet

Sources

Public sources used for this comparison. amazon.co.uk prices, stars and review counts were taken from the listings on 19 October 2026.

  1. Beko Pro4 Premium, UK product page (retrieved 19 October 2026)
  2. Beko Pro4 Premium information sheet (English PDF) (retrieved 19 October 2026)
  3. Beko PSS Premium sanitary silicone (retrieved 19 October 2026)
  4. Beko food silicone 22701 product sheet (retrieved 19 October 2026)
  5. Beko fire-protection silicone information sheet (retrieved 19 October 2026)
  6. Regulation (EC) No 1935/2004 on food contact materials (retrieved 19 October 2026)
  7. Fire safety: Approved Document B (retrieved 19 October 2026)
  8. BS EN 15651-3, sealants for sanitary joints (retrieved 19 October 2026)