Cardiff · Wales

Bath & shower resealing (mastic) in Cardiff

Fixed-price bath resealing in Cardiff and the surrounding area, normally in one visit.

  • Silicone smeared on tiles
  • Unsealed corners
  • Discoloured, yellow sealant
Surface Doctor technician refinishing the outside of a roll-top bath

Bath resealing in Cardiff

Bath resealing in Cardiff, done in place

A good reseal is all about preparation: old silicone removed, mould treated, the joint cleaned and dried. Then the fresh sealant goes on, as one neat, continuous bead. We are frequently asked to fix black spots in the silicone and an untidy old seal, on baths, basins & vanity units and shower trays & enclosures.

We stand behind the work with a one-year guarantee, so you’re not left on your own once we’ve gone.

Area
Cardiff (CF14, CF5, CF3, CF24)
Area hub
Cardiff
Cover
One year on every repair
Quotes
Free, fixed price from pictures
Call
0345 017 0787
Updated
23 October 2026
Technician in a mask working on a freestanding roll-top bath

How it works

Once we’re through the door, the aim is to do the job without disturbing the rest of your home. Surfaces nearby are masked off, the job takes around two hours, depending on what we find, and we finish with a tidy-up and a look at the finished work together.

  1. The surrounding area is protected and the joints masked.
  2. Old sealant and residue are removed.
  3. The joint is cleaned, treated and dried.
  4. Fresh silicone is applied in a continuous bead.
  5. We smooth the bead, remove the tape and leave it to cure.

Before we arrive

  • Let us know about parking or access
  • Move bottles, mats and clutter away from the area
  • Open a window if you can

Ask for a price

Pricing is simple: take a close-up of the damage and a picture from further back, send them over with your postcode, and you’ll get a fixed quote back. There’s no charge for the quote and you’re under no obligation.

Get a fixed quote

Related advice

When we’d advise against a repair

It helps to know what we can’t do too:

  • Gaps too big for silicone alone
  • Hidden water damage
  • Movement in the bath or tray

If in doubt, send photos and we’ll say what we think before you book.

Materials we work on in Cardiff

  • Basins & vanity units
  • Baths
  • Kitchen worktops & sinks
  • Shower trays & enclosures
  • Wet rooms

Signs you need bath resealing in Cardiff

Most reseals are because of black mould. It grows into the silicone, so cleaning only removes the surface.

You may need us if you’ve spotted any of these:

  • Missing sealant behind the taps
  • Black spots in the silicone
  • Sealant that is split or lifting
  • Old sealant that looks dirty

Before booking anyone

  • What aftercare is recommended
  • Whether a trained technician does the job
  • How soon you can use it again
  • Whether the colour is mixed to match

How to compare quotes

Prices and what affects them

You will not pay by the hour. The price is based on:

  • What kind of damage it is
  • How much damage there is
  • Any earlier repairs that need removing first
  • Whether we combine several jobs

It helps to know what pushes a price up or down: access, material, the extent of the damage and whether we can do several items together. Photos let us give you a fixed figure.

How to get a fixed quote

Almost every job we do is priced from pictures. This is what we need:

  • Whether it’s been repaired or coated before
  • Your postcode, so we can check dates
  • What it’s made of, if you know
  • Daylight if possible, and no flash reflection

Call 0345 017 0787 or use the quote form. With a clear picture of the damage and one of the whole bath or shower, we can price the job without visiting.

Why it’s worth resealing in Cardiff

Putting new silicone over old doesn’t last. It peels within weeks, and mould stays trapped behind it. We remove the old sealant completely. A repair generally costs much less than people expect, particularly next to the cost of replacement. Photos let us give you the exact figure.

Why book with us

  • We will tell you if it’s not worth repairing
  • Repair technicians who travel to you, UK-wide
  • Accredited with CHAS, Constructionline and SafeContractor
  • Every repair guaranteed for a year

See our prices page.

What your bath or shower is made of matters

Shower trays

We put weight on a tray before sealing it, so the joint is at its widest.

Baths

We fill the bath before sealing, to open the joint fully.

Landlords, agents and businesses in Cardiff

We carry out planned and one-off repairs for housing associations and facilities teams. A repair avoids taking out and refitting, which matters when someone is living in the home.

For anyone letting property in or around Cardiff, we’ll quote for several properties at once. Send pictures for each one and we’ll price them together.

FAQs for Cardiff

I rent my home. Can I book you?

Yes. Ask your landlord first, and we can send them the quote if that helps.

Do you work in Cardiff?

Yes, we do. We send a technician to Cardiff for every job, and the price is the same as everywhere else.

Why does the silicone keep cracking?

Something is moving. Persistent splitting can mean the support needs attention.

When can I use the bath after resealing?

We will give you the curing time.

How quickly can you book me in?

That depends on our diary for your area. We will offer you dates when we send your quote.

Do you work for landlords and businesses?

Yes, often. We quote for multiple addresses and fit around tenancy changeovers.

What happens next?

We review the pictures and send a fixed quote.

Will the price change on the day?

It’s rare, but if it happens we talk to you first. You decide whether to go ahead.

How to care for the repair

Looking after the surface is easy:

  • Use the extractor fan
  • Open a window after bathing
  • Dry the seal after bathing
  • Do not stand toiletries on the seal

Avoid scraping the joints, and don’t stand bottles on the seal.

Reseal before water gets in. Gaps or lifting edges mean it needs doing.

About Cardiff

Cardiff (Welsh: Caerdydd) is in Wales. We visit clients in Cardiff and the surrounding area, so nothing has to leave your home. Our technicians cover 91 places across Cardiff, from the larger towns to small villages.

Every address in CF14, CF5, CF3 and CF24 is within our area, from the main roads to the quietest streets. From Queen Anne Square, Plasnewydd Square and Timbers Square or a nearby road, a technician can come to you. Cardiff is on the A48 and A469, so it’s easy for us to reach. We also travel to Roath Park (1 mile north-east), Heath (1 mile north-west), Penylan (1 mile east), Cyncoed (2 miles north-east) and Llanedeyrn (2 miles north-east). Further out, we also cover Ely (3 miles south-west), Caerau (3 miles south-west), St Mellons (4 miles north-east), Llanrumney (3 miles north-east), Morristown (5 miles south) and Fairwater (3 miles west).

Near you in Cardiff

We visit homes around Centre for Occupational and Health Psychology, Cardiff High School and St Joseph's Church, among other places. Other local landmarks include The Heath pub (within half a mile south), Roath Park (0.6 miles north-east) and Allensbank Primary School (under half a mile north-west). For rail, the closest station is Cathays station, about 0.9 miles south. Other landmarks nearby include Regimental Museum of 1st The Queens Dragoon Guards (under half a mile south-west) and University Dental Hospital on Cardiff University (0.6 miles north-west). Green spaces nearby include Roath Park Lake and Cock Hill.

Map of Cardiff © OpenStreetMap contributors
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