Surrey · England

Remedial Sealant in Guildford

Removing failed, mouldy or leaking sealant and putting it right for homes and businesses in Guildford and across Surrey. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.

  • Sealant that came away because the surface wasn’t prepared
  • A second bead peeling off the first
  • Caulk or the wrong sealant used in a wet area

Remedial sealant in Guildford

About our remedial sealant in Guildford

Remedial jobs in Guildford usually fall into a few patterns: over-sealed joints, hidden mould, repeat leaks and split movement joints. Each is stripped back and done again properly. We are often asked to deal with a shower that leaks however often it’s resealed and black mould underneath the bead, across botched or over-sealed joints, leaking tray & enclosure joints and expansion joints.

A large town like Guildford has plenty of rented homes, and rented bathrooms and kitchens see heavy use. Sorting the joints between tenancies keeps leaks at bay and makes a property easier to let.

Each job carries a 12-month guarantee, large or small.

Mr Mastic applicator kneeling beside a white bath, sealing the joint where the bath meets beige wall tiles
Location
Guildford (GU1, GU2, GU4, GU3)
Wider area
Surrey
Cover
One year on every job
Price
Quoted before any work starts
Telephone
0345 464 0079
Last updated
26 October 2026

Remedial sealant around Guildford

There are hotels and other places to stay in and around Guildford. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room. Most of the South East has hard water, so limescale builds up on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.

In the older streets around Church of St John the Evangelist, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant. For site and facilities teams at buildings such as Sandfield Primary School, its toilets, changing areas and kitchens need their sealant renewed like any other building’s.

Guildford is about 27 miles south-west of London, in Surrey. We carry out remedial sealant for householders, landlords and businesses in Guildford and the surrounding area, as part of our work across Surrey. Guildford is one of 395 places in Surrey where we work for remedial sealant. Our Crawley page covers work nearby.

Postcode districts we cover here for remedial sealant: GU1, GU2, GU4 and GU3. You will find streets such as Church Road, Market Street and High Street, all of which we cover. With the A3 and A25 close by, Guildford is simple for us to get to. If you’re just outside Guildford, we cover Bellfields (1 mile north), Abbotswood (1 mile south-east), Stoughton (1 mile north-west), Westborough (1 mile west) and Burpham (1 mile north-east). Larger places within reach include Woking (5 miles north), Camberley (9 miles north-west), Epsom (15 miles north-east), Farnham (10 miles west), Egham (13 miles north) and Walton-on-Thames (12 miles north-east). Being one of Surrey’s larger places, Guildford has every kind of property, from flats to offices.

Landmarks near Guildford

Typical jobs here are in homes near The King's Head pub, Guildford High School and Surrey Maths School, among other places. The nearest railway station is London Road (Guildford) station, roughly 0.6 miles south-east of the centre. A little further out are Guildford Castle (0.9 miles south) and Guildford House (0.8 miles south). Open spaces near Guildford include Silent Pool and Pewley Hill.

Map of Guildford © OpenStreetMap contributors

Guildford: your questions answered

I let a flat near London Road (Guildford) station. Can you help?

Yes. We work for landlords and agents as well as homeowners. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.

Is Guildford in your area for remedial sealant?

Yes, Guildford is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.

How long should I leave it?

Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint.

Can I add another job to the visit?

Yes. Several rooms, windows or areas can go on one quote.

What should I tell you?

Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.

Can you remove sealant that’s been put over old sealant?

Yes. Both layers come out; over-sealing fails because silicone will not bond to silicone.

Are you insured?

Yes. We’re fully insured, with over 20 years’ experience in sealant work.

Do you fix expansion and movement joints?

Yes. Backing sets the depth and stops the sealant sticking to the back, which lets it stretch.

Why deal with it now?

DIY removal often leaves scratches and a film of residue, and the residue left behind stops the next bead bonding. Careful stripping is where most of our time goes. For businesses in Guildford, a room closed because of a leak or mould costs more than the sealant, so failing joints are best replaced on a planned basis.

Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.

Why choose Mr Mastic in Guildford

  • Quality sealants from Arbo and Everbuild
  • Sanitary silicone with an anti-fungal additive in wet areas
  • More than 20 years in sealant work
  • Old sealant always removed completely

Read how sealant jobs are priced or what customers say.

DIY versus a professional finish

Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.

The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.

Signs you need remedial sealant in Guildford

Products get mixed up: caulk where it gets wet, rigid sealant where things move, or an acetoxy silicone on a surface it can mark. None of them last.

Common reasons people contact us include:

  • Dark patches showing through the sealant
  • Decorators’ caulk around a bath or shower
  • Leaks that keep coming back after resealing
  • Kitchen joints letting water behind the worktop

Letting a property close to London Road (Guildford) station? Then failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak.

Comparing quotes

  • How long to leave it before use
  • Whether they seal over old material or remove it
  • What insurance they hold
  • What the quote includes, VAT included or not

10 questions to ask before you book

What the job involves on each surface

Mouldy bath & shower sealant

Mould often spreads under the bead as well as through it. We treat the exposed joint once the bead is out so the new sealant starts clean.

Windows & doors

Failed frame mastic is often hard, cracked and in several layers. All of it is cut out and the frame and wall cleaned.

What happens on the day

We keep the work tidy and contained to the area we’re working on. The job generally takes a few hours, depending on how many layers have to come out. Where a business in Guildford needs to stay open, out-of-hours working can be arranged, and homes are booked within our usual hours, Monday to Saturday.

  1. We protect the surfaces around the joint.
  2. The botched or failed sealant is cut away completely.
  3. The joint is degreased and checked for movement and leaks.
  4. New sealant goes in once the joint is dry, and is tooled smooth.
  5. You get the cure time and our view on why the joint failed.

How to prepare

  • Let us know about parking restrictions
  • Clear items away from the joints we are working on
  • For business premises, tell us about site rules or sign-in

How to get a quote

Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or drop us an email and describe the job and send photos if you have them.

Get a price

Read more

Honest limits

To be straight with you, some problems need a different trade:

  • A bath, tray or worktop that moves until it’s properly fixed
  • Leaks from a shower valve, waste or pipework (a plumber’s job)
  • Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed

If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.

Joints and surfaces we work on

  • Leaking tray & enclosure joints
  • Mouldy bath & shower sealant
  • Failed movement joints
  • Expansion joints
  • Botched or over-sealed joints
  • Shrunken worktop sealant

Aftercare tips

So the new joints stay in good condition:

  • Use a soft cloth, not a scourer, on silicone
  • Check ceilings under showers for marks
  • Ask why a joint failed before redoing it
  • Don’t add new sealant on top of old

Watch the joint over the first few weeks, particularly where the original failure was caused by movement. Should anything change, ring 0345 464 0079 or email us.

Mould trapped under over-sealed joints spreads unseen. By the time it shows through, the joint is well past saving.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job